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What is a monad?

Getting started with Haskell

What is Haskell used for in the real world?

Is functional GUI programming possible?

What are free monads?

Abusing the algebra of algebraic data types - why does this work?

What is Weak Head Normal Form?

Haskell: Converting Int to String

Are there pronounceable names for common Haskell operators?

What is the difference between Int and Integer?

How to split a string in Haskell?

How to define a function in ghci across multiple lines?

Why not be dependently typed?

Why is there “data” and “newtype” in Haskell?

What is “lifting” in Haskell?

Multi-line commands in GHCi

Difference between `mod` and `rem` in Haskell

Memoization in Haskell?

What does the “@” symbol mean in reference to lists in Haskell?

What are the primary differences between Haskell and F#?

Reducing garbage-collection pause time in a Haskell program

foldl versus foldr behavior with infinite lists

Shorthand way for assigning a single field in a record, while copying the rest of the fields?

How do you represent a graph in Haskell?

Why is the minimalist, example Haskell quicksort not a “true” quicksort?

What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?

Java's Interface and Haskell's type class: differences and similarities?

What are the best Haskell libraries to operationalize a program?

What is the purpose of Rank2Types?

Why doesn't Haskell's Prelude.read return a Maybe?

What's the fuss about Haskell?

Guards vs. if-then-else vs. cases in Haskell

When is memoization automatic in GHC Haskell?

How can I get nth element from a list?

Haskell composition (.) vs F#'s pipe forward operator (|>)

Haskell export current module with additional imported module

What's the point of 'const' in the Haskell Prelude?

How do I clear the terminal screen in Haskell?

Exponentiation in Haskell

Does Haskell have tail-recursive optimization?

When are higher kinded types useful?

Orphaned instances in Haskell

Why can I not make String an instance of a typeclass?

Why is Haskell (sometimes) referred to as “Best Imperative Language”?

Haskell: lift vs liftIO

How to provide explicit type declarations for functions when using GHCi?

What do “reify” and “reification” mean in the context of (functional?) programming?

How and why does the Haskell Cont monad work?

Haskell or Standard ML for beginners?

Text or Bytestring

How to run a Haskell file in interpreted mode

How does foldr work?

Good Haskell coding standards

Haskell types frustrating a simple 'average' function

Cartesian product of 2 lists in Haskell

What is () in Haskell, exactly?

How can I write multiline strings in Haskell?

How to compare two functions for equivalence, as in (λx.2*x) == (λx.x+x)?

Lazy Evaluation and Time Complexity

Left and Right Folding over an Infinite list

What are arrows, and how can I use them?

How to create a polyvariadic haskell function?

What characters are permitted for Haskell operators?

Haskell IDE for Windows?

DatatypeContexts Deprecated in Latest GHC: Why?

The Pause monad

Monads with Join() instead of Bind()

What is Haskell's Stream Fusion

Difference between OOP interfaces and FP type classes

Haskell: how to map a tuple?

Why is the bind operator (>>=) defined as it is?

Why does Haskell use mergesort instead of quicksort?

Haskell type vs. newtype with respect to type safety

What is monoid homomorphism exactly?

How to print integer literals in binary or hex in haskell?

My cabal packages are FUBAR; how can I purge them and start over?

Why use null function instead of == [] to check for empty list in Haskell?

What is the difference between Pattern Matching and Guards?

How to import a .hs file in Haskell

Is there a function to flatten a nested list of elements?

How do you use Control.Applicative to write cleaner Haskell?

How to “debug” Haskell with printfs?

How to install a package using stack?

What is the benefit of purely functional data structure?

Sets, Functors and Eq confusion

Haskell function application and currying

How to reduce duplication in the build-depends fields of a .cabal file?

Why are Haskell algebraic data types “closed”?

An example of a Foldable which is not a Functor (or not Traversable)?

Integral operators quot vs. div

What is the most production-level Haskell to JavaScript compiler, to write code running in the browser?

Why is Haskell missing “obvious” Typeclasses

Haskell record syntax

unique elements in a haskell list

In Haskell, how do you trim whitespace from the beginning and end of a string?

Haskell (:) and (++) differences

Haskell's ($) is a magic operator?

Algebraically interpreting polymorphism

Is there a better way to have optional function arguments in Haskell?

How do I write, “if typeclass a, then a is also an instance of b by this definition.”

Scala: How to define “generic” function parameters?

ghci 'Not in scope:' message

Is there a nice way to make function signatures more informative in Haskell?

What does the term “reason about” mean in computer science?

Web Scraping With Haskell

Currying subtraction

Why is there no IO transformer in Haskell?

Why is the F# version of this program 6x faster than the Haskell one?

zipWith analogue in Python?

Avoiding lift with monad transformers

In what sense is the IO Monad pure?

Testing IO actions with Monadic QuickCheck

Haskell guards on lambda functions?

What does the : infix operator do in Haskell?

How to go back to prelude> in ghci

What is a monad in FP, in categorical terms?

Higher-kinded Types with C++

Y Combinator in Haskell

Lazy Evaluation vs Macros

Why is `2 + x = 7` valid Haskell?

Doubly Linked List in a Purely Functional Programming Language

What does data … where mean in Haskell?

How atomic are GHC's thunks?

How does Haskell tail recursion work?

Profiling high-performance Haskell code

Haskell function composition operator of type (c→d) → (a→b→c) → (a→b→d)

How to define function signatures partially in Haskell?

How to extract value from monadic action

Better Way to Define an Enum in Haskell

Printing elements of a list on new lines

Do ghc-compiled binaries require GHC or are they self-contained?

If return a = return b then does a=b?

Explanation of “tying the knot”

What are Alternative's “some” and “many” useful for?

Why is this Haskell program so much slower than an equivalent Python one?

Java tagged union / sum types

Can I constrain a type family?

What is the Store comonad?

Differences between functors and endofunctors

How are Dynamic Programming algorithms implemented in idiomatic Haskell?

Haskell ranges and floats

Python faster than compiled Haskell?

How to tell if a list is infinite?

functions as applicative functors (Haskell / LYAH)

What is the connection between laziness and purity?

Haskell Convert Integer to Int?

How can I set up a simple test with Cabal?

Does Haskell have List Slices (i.e. Python)?

Is everything in Haskell stored in thunks, even simple values?

Preferred method for viewing code generated by Template Haskell

Haskell pattern matching - what is it?

String formatting in Haskell

Haskell Thrift library 300x slower than C++ in performance test

Does Haskell provide min/max constants for the range of Int?

What are some problems best/worst addressed by functional programming?

Lazy evaluation of terms in an infinite list in Haskell

Haskell operator vs function precedence

How to set a program's command line arguments for GHCi?

List of showables OOP-style in Haskell?

What is a contravariant functor?

`String' is applied to too many type arguments

How do I define Lisp’s apply in Haskell?

How do experienced Haskell developers approach laziness at *design* time?

Is there an inverse of the Haskell $ operator?

Functional equivalent of decorator pattern?

How to configure GHCi to automatically import modules

What are Prisms?

How can I use GHCi with the new cabal 1.17 sandboxes?

How do I get text-icu working on Windows?

Find the longest common starting substring in a set of strings

STArray documentation for newbies and State/ST related questions

Why does the 2-tuple Functor instance only apply the function to the second element?

How can I bind the second argument in a function but not the first (in an elegant way)?

Wrong IO actions order using putStr and getLine

Converting IEEE 754 floating point in Haskell Word32/64 to and from Haskell Float/Double

Can a compiler automatically detect pure functions without the type information about purity?

Why MonadPlus and not Monad + Monoid?

What advantage does Monad give us over an Applicative?

Where can I find a list of all GHC extensions

What's the reason of 'let rec' for impure functional language OCaml?

Haskell file reading

Is there a way to see the list of functions in a module, in GHCI?

Efficient heaps in purely functional languages

Difference between 'return' and 'pure'

How to generate arbitrary instances of a simple type for quickcheck

Is there any chance to write “C major” instead of “major C”?

Haskell Monad bind operator confusion

How to use (->) instances of Monad and confusion about (->)

What are the definitions for >>= and return for the IO monad?

Haskell: hide specific function(s) in module exports?

Getting a list of all possible data type values in Haskell

Using Maybe type in Haskell

Explanation of Monad laws

What's the best workaround for not having “cabal upgrade”?

Why is (a,b,c,d) not sugar for (a,(b,(c,(d,()))))?

Int vs Word in common use?

How to mock for testing in Haskell?

Idiomatic efficient Haskell append?

Have you used Quickcheck in a real project

the behavior of “const id”

Pattern Matching - Prolog vs. Haskell

Arrows are exactly equivalent to applicative functors?

Goto in Haskell: Can anyone explain this seemingly insane effect of continuation monad usage?

Yesod: Getting a database entity by ID from an Int

Optimizing numerical array performance in Haskell

Split a number into its digits with Haskell

Can parser combinators be made efficient?

simple Haskell loop

How can I simulate Haskell's “Either a b” in Java

Ranges in Haskell (GHCi)

Why does this Haskell code work successfully with infinite lists?

What does a Haskell comment starting with `{- |` generally mean?

Are there any purely functional Schemes or Lisps?

Haskell syntax for 'or' in case expressions

Make GHC only type-check?

What exactly does “effectful” mean

What are the pros and cons of Enumerators vs. Conduits vs. Pipes?

Haskell Graphics Library that works in GHCi on MacOS X

What are some interesting uses of higher-order functions?

Do you find you still need variables you can change, and if so why?

Higher-kinded generics in Java

What are the main differences between Scala and Frege (in programming paradigms)?

How to reduce memory usage in a Haskell app?

Haskell program outputs `<<loop>>`

What is the relationship between ghc-pkg and cabal?

Hidden features of Haskell

How to get every Nth element of an infinite list in Haskell?

How to install Haskell on Mac OS

How do I use constants in haskell, to avoid magic numbers?

Maybe “kind-of” monad in Python

Haskell: Force floats to have two decimals

What is the relationship between unboxed types and strictness?

How, why and when to use the “.Internal” modules pattern?

Advantages of strict fields in data types

How do I get ghci to see packages I installed from cabal?

Why there needs to be a $ in calls like “runSomeMonad $ do …”?

How to compose `not` with a function of arbitrary arity?

Finding index of element in a list in Haskell?

Have I upgraded my cabal-install?

Haskell Constraint is no smaller than the instance head

Haskell: Deriving Show for custom type

Haskell's TypeClasses and Go's Interfaces

Haskell Stack install package dependency from github

Is there any way to define flags for cabal dependencies?

Idris eager evaluation

What to use instead of a main loop in Haskell?

Lax monoidal functors with a different monoidal structure

How to find the index of an element in a list?

Constructing efficient monad instances on `Set` (and other containers with constraints) using the continuation monad

How to force evaluation in Haskell?

What does a comma in the guard syntax do?

How does ArrowLoop work? Also, mfix?

How much does it cost for Haskell FFI to go into C and back?

Is it possible to program and check invariants in Haskell?

How do you compute the difference between successive elements of a list of unknown size, functionally?

Deploying Yesod to Heroku, can't build statically

Applying multiple functions to the same value point-free style in Haskell

Defining own Ord for a data type

Pattern matching string prefixes in Haskell

Can good type systems distinguish between matrices in different bases?

Does C# support function composition?

Should I use typeclasses or not?

Why do we need 'seq' or 'pseq' with 'par' in Haskell?

What is the difference between $ (dollar) and $! (dollar exclamation point)

Examples of a monad whose Applicative part can be better optimized than the Monad part

Are Lists Inductive or Coinductive in Haskell?

Why can Haskell exceptions only be caught inside the IO monad?

Why can't I use record selectors with an existentially quantified type?

Generating documentation for my own code with Haddock and stack

How to uninstall a Haskell package installed with stack?

Haskell random numbers suddenly start to “converge” after months of running

Replace individual list elements in Haskell?

Grouping a list into lists of n elements in Haskell

const function in Haskell

How to call the same function 'n' times?

Is there a Python equivalent of the Haskell 'let'

How do I create an operator in Haskell?

Is it possible to get the infinite kind error in Haskell 98?

GHCi “let” — what does it do?

Combine state with IO actions

Haskell type signature with multiple class constraints

Static types, polymorphism and specialization

Saving my running toplevel for later

Haskell: read input character from console immediately, not after newline

Get evaluation timings in GHCi

How are mutable arrays implemented in Haskell?

How has Haskell changed?

Haskell - What is Control.Applicative.Alternative good for?

Flipped / reversed fmap (<$>)?

Haskell plotting library similar to MATLAB

Installing Haskell packages on Mac

Get sqrt from Int in Haskell

In Haskell, is there infinity :: Num a => a?

efficiently checking that all the elements of a (big) list are the same

Prompting for a password in Haskell command line application

What does it mean to compose two Functors?

Installing ghc binaries on Linux (can't find libgmp.so)

Why does Scala not have a return/unit function defined for each monad (in contrast to Haskell)?

Defining a function by equations with different number of arguments

How to get the ASCII value of a character in Haskell?

repeatedly applying a function until the result is stable

F# Type declaration possible ala Haskell?

What's the conceptual difference between Machines and Conduits (or other similar libraries)?

Why Haskell doesn't have a single element tuple?

Where to find programming exercises for applicative functors?

One REPL to bind them all?

Converting Data.Text to Int in Haskell

How do I avoid writing this type of Haskell boilerplate code

QuickCheck: Arbitrary instances of nested data structures that generate balanced specimens

Removing duplicates from a list in Haskell without elem

Rotate a list in Haskell

How do I convert a list to a tuple in Haskell?

Why is length of “Níðhöggr” 9?

Why does foldr use a helper function?

Is there ever a good reason to use unsafePerformIO?

Overloading function signatures haskell

Decrementing ranges in Haskell

Is there a canonical haskell type for “One or Both”?

Haskell Bytestrings: How to pattern match?

Haskell line of code not compiling: “Illegal datatype context”

What monads can be expressed as Free over some functor?

Haskell: Parsing command line arguments

Lazy List of Prime Numbers

Restructuring an OOP datatype into Haskell types

Boilerplate-free annotation of ASTs in Haskell?

Can record's field be matched with some value and assigned to a parameter at the same time?

Why can Haskell handle very large numbers easily?

Haskell date parsing and formatting

Can Haskell functions be serialized?

How do you combine filter conditions

Where do values fit in Category of Hask?

Lambda for type expressions in Haskell?

Haskell/GHC UndecidableInstances - example for non-terminating type check?

withFile vs. openFile

Understanding Haskell's Bool Deriving an Ord

How to get Haskell QuickCheck 2.4 to increase # tests?

Implementation of null function

Haskell, multiplying Int and Float within a function

How to make a type with restrictions

What does concatMap do?

Using Haskell to output a UTF-8-encoded ByteString

Haskell as REST server

How to list all the installed packages and their version with Cabal?

How do I check what version of a package is installed with stack?

How to add type annotation in let binding

how do I print a list in haskell?

Is there an unsigned integer type that will warn about negative literals?

Is it possible to place inequality constraints on haskell type variables?

All matches of regex in Haskell

How does seq force functions?

What are the reasons that protocols and multimethods in Clojure are less powerful for polymorphism than typeclasses in Haskell?

Is there a practical way of using natural numbers in Haskell?

How to embed images in Haddock documentation

`Integer` vs `Int64` vs `Word64`

Installing & Building GHC with OSX Mavericks GHC

Haskell: What monad did I just reinvent?

Threading extra state through a parser in Scala

Why are if expressions frowned upon in Haskell?

Is there a language with constrainable types?

Clean and type-safe state machine implementation in a statically typed language?

Purely functional concurrent skip list

Get all permutations of a list in Haskell

How do I re-write a Haskell function of two argument to point-free style

Can you recognize an infinite list in a Haskell program?

Are closures a violation of the functional programming paradigm?

What are some compelling use cases of infinite data structures?

How to prevent common sub-expression elimination (CSE) with GHC

Efficient queue in Haskell

How to compile a resource into a binary in Haskell?

How to invoke bash or shell scripts from a haskell program?

Haskell where clause syntax inside a do block

Why doesn't TypeSynonymInstances allow partially applied type synonyms to be used in instance heads?

ExitFailure 9 when trying to install ghc-mod using Cabal

Haskell syntax for a case expression in a do block

Get Unix / Epoch time as Int

Haskell Could not find module `System'

What is the equivalent to (+1) for the subtraction, since (-1) is seen as a negative number?

How to view the generated code for derived instances / deriving in Haskell

Haskell infix function application precedence

Haskell String-> Int Type Conversion

What are the advantages and disadvantages of using lenses?

Haskell — how to use multiple modules in the same file?

What exactly are the categories that are being mapped by Applicative Functors?

Template Haskell: reify in GHCi

What is the type of Nothing in Haskell?

Why is ListT monad transformer considered buggy - what monad laws it breaks?

Need a tutorial for using GHC to parse and typecheck Haskell

Is RxJS.Observable a monad?

Merging two lists in Haskell

Splitting list into a list of possible tuples

String interpolation in Haskell

confused about function as instance of Functor in haskell

Can Haskell be used to write shell scripts?

Is there some way to define an Enum in haskell that wraps around?

Program design in Haskell: how to do simulation without mutability

Division by zero in Haskell

Installing Haskell on Ubuntu 12

How do I test if a floating point number is an integer in haskell?

Play a wav file with Haskell

Create a static Haskell Linux executable

Does Haskell have variadic functions/tuples?

Do Haskell imports have side effects?

Is operational really isomorphic to a free monad?

Or-patterns in Haskell

Cabal doesn't work on Mac OS X Lion because of gcc path

Relax ordering constraints in monadic computation

What makes Iteratees worth the complexity?

Haskell (haskeline) word completion

Unicode console I/O in Haskell on Windows

Have J style adverbs, forks etc been emulated via libraries in mainstream functional languages?

How can one distribute Haskell programs to non-technical end users?

Has anyone ever compiled a list of the imports needed to avoid the “not polymorphic enough” definitions in Haskell's standard libraries?

Why is function definition for all types at once not allowed in Haskell?

Is there a better way to write a “string contains X” method?

What does a fullstop or period or dot (.) mean in Haskell?

Convert a Lazy ByteString to a strict ByteString

Haskell range notation to generate list. Unexpected output

Why does Maybe include Just?

Haskell Typeclass shorthand

Must mplus always be associative? Haskell wiki vs. Oleg Kiselyov

Haskell How to convert Char to Word8

How to catch a no parse exception from the read function in Haskell?

Can I speed up this Haskell algorithm?

Comparing lists in Haskell, or more specifically what is lexicographical order?

Inheritance to extend a data structure in Haskell

Confusion over the State Monad code on “Learn you a Haskell”

Where can I learn advanced Haskell?

Why Int Does Not Implement 'Monoid'?

Type for representing a list with 0 to 5 values

Is monad bind (>>=) operator closer to function composition (chaining) or function application?

Num vs Integral

How does the Haskell rec keyword work?

Why Do We Need Maybe Monad Over Either Monad

Are there non-trivial Foldable or Traversable instances that don't look like containers?

Difference between Haskell's Lazy and Strict monads (or transformers)

How does one write efficient Dynamic Programming algorithms in Haskell?

What are super combinators and constant applicative forms?

how to easily get https post response data?

Importing function with an alias in Haskell

Depending on a local package in cabal

How to add a changelog to a Cabal package?

Image drawing library for Haskell?

Finding where <<loop>> happened

Is there a Functor that cannot be a law-abiding Apply?

Monad laws expressed in terms of join instead of bind?

Expand type synonyms, type families with GHCi

Can all typechecking occurrences of `coerce` safely be replaced with `unsafeCoerce`?

Emacs Haskell indentation

Parsec: Applicatives vs Monads

What's the syntax for single-line pattern matching?

Mapping over Either's Left

How to pick a random list element in a pure function?

Haskell cabal-install errors

Pattern matching identical values

Haskell “where” indentation: why must it be indented past identifier?

Ambiguous type variable `a0' in the constraints

Specifying package name for module-related commands in ghci

count occurrences of elements

replacement / substition with Haskell regex libraries

Why are polymorphic values not inferred in Haskell?

How is Data.Void.absurd different from ⊥?

How to concisely express function iteration?

Debugging infinite loops in Haskell programs with GHCi

Is foldl ever preferable to its strict cousin, foldl'?

Why does Haskell not have an I Monad (for input only, unlike the IO monad)?

When to use STRef or IORef?

Is performance of partial or curried functions well defined in Haskell?

Haskell quickcheck - how to generate only printable strings

Infinite loop in haskell? (newbie)

case on monadic value

Producing multiple executables from single project

What does the UNPACK pragma do, in this case?

How to avoid recompiling in this cabal file?

Creating instance of Read type class in Haskell for custom data type

How to call Haskell from Javascript with GHCJS

How does this definition of ArrowLoop.loop work?

What is a monad-transformer as distinct from a monad?

How to read character in whitespace language

Using guards in let .. in expressions

Learning Haskell: How to remove an item from a List in Haskell

Contrasting C# generics with Haskell parameterized types

Haskell: Function to determine the arity of functions?

Could not find module `Data.Map' — It is a member of the hidden package

Haskell pattern matching - how to use constants variable

More on generic Scala functions

Round number to specified number of digits

Why is it so uncommon to use type signatures in where clauses?

Why don't Haskell compilers facilitate deterministic memory management?

Trick for “reusing” arguments in Haskell?

Integer to float

Why does Haskell force data constructor's first letter to be upper case?

fmap and “flat map” in Haskell

Folding across Maybes in Haskell

How to install haskell 8 on ubuntu 16.04

Haskell Function Application

How do you make a generic memoize function in Haskell?

Comparing design by contract to type systems

How to get normal value from IO action in Haskell

Haskell caching results of a function

Using a Lens to read multiple fields

Haskell scoping in nested function definitions using where

What is an alternative to a prelude with qualfied imports

Haskell: Lists vs Streams

What are type quantifiers?

How to create a type bounded within a certain range

How to convert Char to Int in Haskell?

Evaluation strategy

Why are monad transformers different to stacking monads?

Why isn't Kleisli an instance of Monoid?

How can I do an HTTPS request in Haskell?

Isn't it redundant for Control.Lens.Setter to wrap types in functors?

Haskell: `Map (a,b) c` versus `Map a (Map b c)`?

Is implementing this words function possible without a postprocessing step after folding?

Cabal install gtk failing

What is going on with the types in this ghci session?

Why is this a useful warning in Haskell when pattern matching? “Defined but not used”

Convert a String list to an Int list

What is the difference between liftM and mapM in Haskell

Trees in Haskell

Why doesn't sortBy take (a -> a -> Bool)?

How to find the longest word in list?

Haskell replace element in list

Why is the type of this function (a -> a) -> a?

Generate a random integer in a range in Haskell without a seed

Implement zip using foldr

What is the role of 'bottom' (⊥) in Haskell function definitions?

Haskell lazy I/O and closing files

Get a sublist in Haskell

Why Haskell range needs spaces when using [LT .. GT]?

Why does Haskell lack a literal Data.Map constructor syntax?

Can't compile haskell project: linking step fails

Reasonably efficient pure-functional matrix product in Haskell?

stack new command failing to download build plan for lts-14.1

Haskell “collections” language design

What is the effect of type synonyms on instances of type classes? What does the TypeSynonymInstances pragma in GHC do?

GHCi ignores type signature

Haskell - pattern matching syntactic sugar and where

How do I take the last n elements of a list

How to catch (and ignore) a call to the error function?

how to increment a variable in functional programming

Extending an existing type in OCaml

Getting started with Haskell

What is Haskell used for in the real world?

Is functional GUI programming possible?

What are free monads?

Abusing the algebra of algebraic data types - why does this work?

What is Weak Head Normal Form?

Haskell: Converting Int to String

Are there pronounceable names for common Haskell operators?

What is the difference between Int and Integer?

How to split a string in Haskell?

How to define a function in ghci across multiple lines?

Why not be dependently typed?

Why is there “data” and “newtype” in Haskell?

What is “lifting” in Haskell?

Multi-line commands in GHCi

Difference between `mod` and `rem` in Haskell

Memoization in Haskell?

What does the “@” symbol mean in reference to lists in Haskell?

What are the primary differences between Haskell and F#?

Reducing garbage-collection pause time in a Haskell program

foldl versus foldr behavior with infinite lists

Shorthand way for assigning a single field in a record, while copying the rest of the fields?

How do you represent a graph in Haskell?

Why is the minimalist, example Haskell quicksort not a “true” quicksort?

What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?

Java's Interface and Haskell's type class: differences and similarities?

What are the best Haskell libraries to operationalize a program?

What is the purpose of Rank2Types?

Why doesn't Haskell's Prelude.read return a Maybe?

What's the fuss about Haskell?

Guards vs. if-then-else vs. cases in Haskell

When is memoization automatic in GHC Haskell?

How can I get nth element from a list?

Haskell composition (.) vs F#'s pipe forward operator (|>)

Haskell export current module with additional imported module

What's the point of 'const' in the Haskell Prelude?

How do I clear the terminal screen in Haskell?

Exponentiation in Haskell

Does Haskell have tail-recursive optimization?

When are higher kinded types useful?

Orphaned instances in Haskell

Why can I not make String an instance of a typeclass?

Why is Haskell (sometimes) referred to as “Best Imperative Language”?

Haskell: lift vs liftIO

How to provide explicit type declarations for functions when using GHCi?

What do “reify” and “reification” mean in the context of (functional?) programming?

How and why does the Haskell Cont monad work?

Haskell or Standard ML for beginners?

Text or Bytestring

How to run a Haskell file in interpreted mode

How does foldr work?

Good Haskell coding standards

Haskell types frustrating a simple 'average' function

Cartesian product of 2 lists in Haskell

What is () in Haskell, exactly?

How can I write multiline strings in Haskell?

How to compare two functions for equivalence, as in (λx.2*x) == (λx.x+x)?

Lazy Evaluation and Time Complexity

Left and Right Folding over an Infinite list

What are arrows, and how can I use them?

How to create a polyvariadic haskell function?

What characters are permitted for Haskell operators?

Haskell IDE for Windows?

DatatypeContexts Deprecated in Latest GHC: Why?

The Pause monad

Monads with Join() instead of Bind()

What is Haskell's Stream Fusion

Difference between OOP interfaces and FP type classes

Haskell: how to map a tuple?

Why is the bind operator (>>=) defined as it is?

Why does Haskell use mergesort instead of quicksort?

Haskell type vs. newtype with respect to type safety

What is monoid homomorphism exactly?

How to print integer literals in binary or hex in haskell?

My cabal packages are FUBAR; how can I purge them and start over?

Why use null function instead of == [] to check for empty list in Haskell?

What is the difference between Pattern Matching and Guards?

How to import a .hs file in Haskell

Is there a function to flatten a nested list of elements?

How do you use Control.Applicative to write cleaner Haskell?

How to “debug” Haskell with printfs?

How to install a package using stack?

What is the benefit of purely functional data structure?

Sets, Functors and Eq confusion

Haskell function application and currying

How to reduce duplication in the build-depends fields of a .cabal file?

Why are Haskell algebraic data types “closed”?

An example of a Foldable which is not a Functor (or not Traversable)?

Integral operators quot vs. div

What is the most production-level Haskell to JavaScript compiler, to write code running in the browser?

Why is Haskell missing “obvious” Typeclasses

Haskell record syntax

unique elements in a haskell list

In Haskell, how do you trim whitespace from the beginning and end of a string?

Haskell (:) and (++) differences

Haskell's ($) is a magic operator?

Algebraically interpreting polymorphism

Is there a better way to have optional function arguments in Haskell?

How do I write, “if typeclass a, then a is also an instance of b by this definition.”

Scala: How to define “generic” function parameters?

ghci 'Not in scope:' message

Is there a nice way to make function signatures more informative in Haskell?

What does the term “reason about” mean in computer science?

Web Scraping With Haskell

Currying subtraction

Why is there no IO transformer in Haskell?

Why is the F# version of this program 6x faster than the Haskell one?

zipWith analogue in Python?

Avoiding lift with monad transformers

In what sense is the IO Monad pure?

Testing IO actions with Monadic QuickCheck

Haskell guards on lambda functions?

What does the : infix operator do in Haskell?

How to go back to prelude> in ghci

What is a monad in FP, in categorical terms?

Higher-kinded Types with C++

Y Combinator in Haskell

Lazy Evaluation vs Macros

Why is `2 + x = 7` valid Haskell?

Doubly Linked List in a Purely Functional Programming Language

What does data … where mean in Haskell?

How atomic are GHC's thunks?

How does Haskell tail recursion work?

Profiling high-performance Haskell code

Haskell function composition operator of type (c→d) → (a→b→c) → (a→b→d)

How to define function signatures partially in Haskell?

How to extract value from monadic action

Better Way to Define an Enum in Haskell

Printing elements of a list on new lines

Do ghc-compiled binaries require GHC or are they self-contained?

If return a = return b then does a=b?

Explanation of “tying the knot”

What are Alternative's “some” and “many” useful for?

Why is this Haskell program so much slower than an equivalent Python one?

Java tagged union / sum types

Can I constrain a type family?

What is the Store comonad?

Differences between functors and endofunctors

How are Dynamic Programming algorithms implemented in idiomatic Haskell?

Haskell ranges and floats

Python faster than compiled Haskell?

How to tell if a list is infinite?

functions as applicative functors (Haskell / LYAH)

What is the connection between laziness and purity?

Haskell Convert Integer to Int?

How can I set up a simple test with Cabal?

Does Haskell have List Slices (i.e. Python)?

Is everything in Haskell stored in thunks, even simple values?

Preferred method for viewing code generated by Template Haskell

Haskell pattern matching - what is it?

String formatting in Haskell

Haskell Thrift library 300x slower than C++ in performance test

Does Haskell provide min/max constants for the range of Int?

What are some problems best/worst addressed by functional programming?

Lazy evaluation of terms in an infinite list in Haskell

Haskell operator vs function precedence

How to set a program's command line arguments for GHCi?

List of showables OOP-style in Haskell?

What is a contravariant functor?

`String' is applied to too many type arguments

How do I define Lisp’s apply in Haskell?

How do experienced Haskell developers approach laziness at *design* time?

Is there an inverse of the Haskell $ operator?

Functional equivalent of decorator pattern?

How to configure GHCi to automatically import modules

What are Prisms?

How can I use GHCi with the new cabal 1.17 sandboxes?

How do I get text-icu working on Windows?

Find the longest common starting substring in a set of strings

STArray documentation for newbies and State/ST related questions

Why does the 2-tuple Functor instance only apply the function to the second element?

How can I bind the second argument in a function but not the first (in an elegant way)?

Wrong IO actions order using putStr and getLine

Converting IEEE 754 floating point in Haskell Word32/64 to and from Haskell Float/Double

Can a compiler automatically detect pure functions without the type information about purity?

Why MonadPlus and not Monad + Monoid?

What advantage does Monad give us over an Applicative?

Where can I find a list of all GHC extensions

What's the reason of 'let rec' for impure functional language OCaml?

Haskell file reading

Is there a way to see the list of functions in a module, in GHCI?

Efficient heaps in purely functional languages

Difference between 'return' and 'pure'

How to generate arbitrary instances of a simple type for quickcheck

Is there any chance to write “C major” instead of “major C”?

Haskell Monad bind operator confusion

How to use (->) instances of Monad and confusion about (->)

What are the definitions for >>= and return for the IO monad?

Haskell: hide specific function(s) in module exports?

Getting a list of all possible data type values in Haskell

Using Maybe type in Haskell

Explanation of Monad laws

What's the best workaround for not having “cabal upgrade”?

Why is (a,b,c,d) not sugar for (a,(b,(c,(d,()))))?

Int vs Word in common use?

How to mock for testing in Haskell?

Idiomatic efficient Haskell append?

Have you used Quickcheck in a real project

the behavior of “const id”

Pattern Matching - Prolog vs. Haskell

Arrows are exactly equivalent to applicative functors?

Goto in Haskell: Can anyone explain this seemingly insane effect of continuation monad usage?

Yesod: Getting a database entity by ID from an Int

Optimizing numerical array performance in Haskell

Split a number into its digits with Haskell

Can parser combinators be made efficient?

simple Haskell loop

How can I simulate Haskell's “Either a b” in Java

Ranges in Haskell (GHCi)

Why does this Haskell code work successfully with infinite lists?

What does a Haskell comment starting with `{- |` generally mean?

Are there any purely functional Schemes or Lisps?

Haskell syntax for 'or' in case expressions

Make GHC only type-check?

What exactly does “effectful” mean

What are the pros and cons of Enumerators vs. Conduits vs. Pipes?

Haskell Graphics Library that works in GHCi on MacOS X

What are some interesting uses of higher-order functions?

Do you find you still need variables you can change, and if so why?

Higher-kinded generics in Java

What are the main differences between Scala and Frege (in programming paradigms)?

How to reduce memory usage in a Haskell app?

Haskell program outputs `<<loop>>`

What is the relationship between ghc-pkg and cabal?

Hidden features of Haskell

How to get every Nth element of an infinite list in Haskell?

How to install Haskell on Mac OS

How do I use constants in haskell, to avoid magic numbers?

Maybe “kind-of” monad in Python

Haskell: Force floats to have two decimals

What is the relationship between unboxed types and strictness?

How, why and when to use the “.Internal” modules pattern?

Advantages of strict fields in data types

How do I get ghci to see packages I installed from cabal?

Why there needs to be a $ in calls like “runSomeMonad $ do …”?

How to compose `not` with a function of arbitrary arity?

Finding index of element in a list in Haskell?

Have I upgraded my cabal-install?

Haskell Constraint is no smaller than the instance head

Haskell: Deriving Show for custom type

Haskell's TypeClasses and Go's Interfaces

Haskell Stack install package dependency from github

Is there any way to define flags for cabal dependencies?

Idris eager evaluation

What to use instead of a main loop in Haskell?

Lax monoidal functors with a different monoidal structure

How to find the index of an element in a list?

Constructing efficient monad instances on `Set` (and other containers with constraints) using the continuation monad

How to force evaluation in Haskell?

What does a comma in the guard syntax do?

How does ArrowLoop work? Also, mfix?

How much does it cost for Haskell FFI to go into C and back?

Is it possible to program and check invariants in Haskell?

How do you compute the difference between successive elements of a list of unknown size, functionally?

Deploying Yesod to Heroku, can't build statically

Applying multiple functions to the same value point-free style in Haskell

Defining own Ord for a data type

Pattern matching string prefixes in Haskell

Can good type systems distinguish between matrices in different bases?

Does C# support function composition?

Should I use typeclasses or not?

Why do we need 'seq' or 'pseq' with 'par' in Haskell?

What is the difference between $ (dollar) and $! (dollar exclamation point)

Examples of a monad whose Applicative part can be better optimized than the Monad part

Are Lists Inductive or Coinductive in Haskell?

Why can Haskell exceptions only be caught inside the IO monad?

Why can't I use record selectors with an existentially quantified type?

Generating documentation for my own code with Haddock and stack

How to uninstall a Haskell package installed with stack?

Haskell random numbers suddenly start to “converge” after months of running

Replace individual list elements in Haskell?

Grouping a list into lists of n elements in Haskell

const function in Haskell

How to call the same function 'n' times?

Is there a Python equivalent of the Haskell 'let'

How do I create an operator in Haskell?

Is it possible to get the infinite kind error in Haskell 98?

GHCi “let” — what does it do?

Combine state with IO actions

Haskell type signature with multiple class constraints

Static types, polymorphism and specialization

Saving my running toplevel for later

Haskell: read input character from console immediately, not after newline

Get evaluation timings in GHCi

How are mutable arrays implemented in Haskell?

How has Haskell changed?

Haskell - What is Control.Applicative.Alternative good for?

Flipped / reversed fmap (<$>)?

Haskell plotting library similar to MATLAB

Installing Haskell packages on Mac

Get sqrt from Int in Haskell

In Haskell, is there infinity :: Num a => a?

efficiently checking that all the elements of a (big) list are the same

Prompting for a password in Haskell command line application

What does it mean to compose two Functors?

Installing ghc binaries on Linux (can't find libgmp.so)

Why does Scala not have a return/unit function defined for each monad (in contrast to Haskell)?

Defining a function by equations with different number of arguments

How to get the ASCII value of a character in Haskell?

repeatedly applying a function until the result is stable

F# Type declaration possible ala Haskell?

What's the conceptual difference between Machines and Conduits (or other similar libraries)?

Why Haskell doesn't have a single element tuple?

Where to find programming exercises for applicative functors?

One REPL to bind them all?

Converting Data.Text to Int in Haskell

How do I avoid writing this type of Haskell boilerplate code

QuickCheck: Arbitrary instances of nested data structures that generate balanced specimens

Removing duplicates from a list in Haskell without elem

Rotate a list in Haskell

How do I convert a list to a tuple in Haskell?

Why is length of “Níðhöggr” 9?

Why does foldr use a helper function?

Is there ever a good reason to use unsafePerformIO?

Overloading function signatures haskell

Decrementing ranges in Haskell

Is there a canonical haskell type for “One or Both”?

Haskell Bytestrings: How to pattern match?

Haskell line of code not compiling: “Illegal datatype context”

What monads can be expressed as Free over some functor?

Haskell: Parsing command line arguments

Lazy List of Prime Numbers

Restructuring an OOP datatype into Haskell types

Boilerplate-free annotation of ASTs in Haskell?

Can record's field be matched with some value and assigned to a parameter at the same time?

Why can Haskell handle very large numbers easily?

Haskell date parsing and formatting

Can Haskell functions be serialized?

How do you combine filter conditions

Where do values fit in Category of Hask?

Lambda for type expressions in Haskell?

Haskell/GHC UndecidableInstances - example for non-terminating type check?

withFile vs. openFile

Understanding Haskell's Bool Deriving an Ord

How to get Haskell QuickCheck 2.4 to increase # tests?

Implementation of null function

Haskell, multiplying Int and Float within a function

How to make a type with restrictions

What does concatMap do?

Using Haskell to output a UTF-8-encoded ByteString

Haskell as REST server

How to list all the installed packages and their version with Cabal?

How do I check what version of a package is installed with stack?

How to add type annotation in let binding

how do I print a list in haskell?

Is there an unsigned integer type that will warn about negative literals?

Is it possible to place inequality constraints on haskell type variables?

All matches of regex in Haskell

How does seq force functions?

What are the reasons that protocols and multimethods in Clojure are less powerful for polymorphism than typeclasses in Haskell?

Is there a practical way of using natural numbers in Haskell?

How to embed images in Haddock documentation

`Integer` vs `Int64` vs `Word64`

Installing & Building GHC with OSX Mavericks GHC

Haskell: What monad did I just reinvent?

Threading extra state through a parser in Scala

Why are if expressions frowned upon in Haskell?

Is there a language with constrainable types?

Clean and type-safe state machine implementation in a statically typed language?

Purely functional concurrent skip list

Get all permutations of a list in Haskell

How do I re-write a Haskell function of two argument to point-free style

Can you recognize an infinite list in a Haskell program?

Are closures a violation of the functional programming paradigm?

What are some compelling use cases of infinite data structures?

How to prevent common sub-expression elimination (CSE) with GHC

Efficient queue in Haskell

How to compile a resource into a binary in Haskell?

How to invoke bash or shell scripts from a haskell program?

Haskell where clause syntax inside a do block

Why doesn't TypeSynonymInstances allow partially applied type synonyms to be used in instance heads?

ExitFailure 9 when trying to install ghc-mod using Cabal

Haskell syntax for a case expression in a do block

Get Unix / Epoch time as Int

Haskell Could not find module `System'

What is the equivalent to (+1) for the subtraction, since (-1) is seen as a negative number?

How to view the generated code for derived instances / deriving in Haskell

Haskell infix function application precedence

Haskell String-> Int Type Conversion

What are the advantages and disadvantages of using lenses?

Haskell — how to use multiple modules in the same file?

What exactly are the categories that are being mapped by Applicative Functors?

Template Haskell: reify in GHCi

What is the type of Nothing in Haskell?

Why is ListT monad transformer considered buggy - what monad laws it breaks?

Need a tutorial for using GHC to parse and typecheck Haskell

Is RxJS.Observable a monad?

Merging two lists in Haskell

Splitting list into a list of possible tuples

String interpolation in Haskell

confused about function as instance of Functor in haskell

Can Haskell be used to write shell scripts?

Is there some way to define an Enum in haskell that wraps around?

Program design in Haskell: how to do simulation without mutability

Division by zero in Haskell

Installing Haskell on Ubuntu 12

How do I test if a floating point number is an integer in haskell?

Play a wav file with Haskell

Create a static Haskell Linux executable

Does Haskell have variadic functions/tuples?

Do Haskell imports have side effects?

Is operational really isomorphic to a free monad?

Or-patterns in Haskell

Cabal doesn't work on Mac OS X Lion because of gcc path

Relax ordering constraints in monadic computation

What makes Iteratees worth the complexity?

Haskell (haskeline) word completion

Unicode console I/O in Haskell on Windows

Have J style adverbs, forks etc been emulated via libraries in mainstream functional languages?

How can one distribute Haskell programs to non-technical end users?

Has anyone ever compiled a list of the imports needed to avoid the “not polymorphic enough” definitions in Haskell's standard libraries?

Why is function definition for all types at once not allowed in Haskell?

Is there a better way to write a “string contains X” method?

What does a fullstop or period or dot (.) mean in Haskell?

Convert a Lazy ByteString to a strict ByteString

Haskell range notation to generate list. Unexpected output

Why does Maybe include Just?

Haskell Typeclass shorthand

Must mplus always be associative? Haskell wiki vs. Oleg Kiselyov

Haskell How to convert Char to Word8

How to catch a no parse exception from the read function in Haskell?

Can I speed up this Haskell algorithm?

Comparing lists in Haskell, or more specifically what is lexicographical order?

Inheritance to extend a data structure in Haskell

Confusion over the State Monad code on “Learn you a Haskell”

Where can I learn advanced Haskell?

Why Int Does Not Implement 'Monoid'?

Type for representing a list with 0 to 5 values

Is monad bind (>>=) operator closer to function composition (chaining) or function application?

Num vs Integral

How does the Haskell rec keyword work?

Why Do We Need Maybe Monad Over Either Monad

Are there non-trivial Foldable or Traversable instances that don't look like containers?

Difference between Haskell's Lazy and Strict monads (or transformers)

How does one write efficient Dynamic Programming algorithms in Haskell?

What are super combinators and constant applicative forms?

how to easily get https post response data?

Importing function with an alias in Haskell

Depending on a local package in cabal

How to add a changelog to a Cabal package?

Image drawing library for Haskell?

Finding where <<loop>> happened

Is there a Functor that cannot be a law-abiding Apply?

Monad laws expressed in terms of join instead of bind?

Expand type synonyms, type families with GHCi

Can all typechecking occurrences of `coerce` safely be replaced with `unsafeCoerce`?

Emacs Haskell indentation

Parsec: Applicatives vs Monads

What's the syntax for single-line pattern matching?

Mapping over Either's Left

How to pick a random list element in a pure function?

Haskell cabal-install errors

Pattern matching identical values

Haskell “where” indentation: why must it be indented past identifier?

Ambiguous type variable `a0' in the constraints

Specifying package name for module-related commands in ghci

count occurrences of elements

replacement / substition with Haskell regex libraries

Why are polymorphic values not inferred in Haskell?

How is Data.Void.absurd different from ⊥?

How to concisely express function iteration?

Debugging infinite loops in Haskell programs with GHCi

Is foldl ever preferable to its strict cousin, foldl'?

Why does Haskell not have an I Monad (for input only, unlike the IO monad)?

When to use STRef or IORef?

Is performance of partial or curried functions well defined in Haskell?

Haskell quickcheck - how to generate only printable strings

Infinite loop in haskell? (newbie)

case on monadic value

Producing multiple executables from single project

What does the UNPACK pragma do, in this case?

How to avoid recompiling in this cabal file?

Creating instance of Read type class in Haskell for custom data type

How to call Haskell from Javascript with GHCJS

How does this definition of ArrowLoop.loop work?

What is a monad-transformer as distinct from a monad?

How to read character in whitespace language

Using guards in let .. in expressions

Learning Haskell: How to remove an item from a List in Haskell

Contrasting C# generics with Haskell parameterized types

Haskell: Function to determine the arity of functions?

Could not find module `Data.Map' — It is a member of the hidden package

Haskell pattern matching - how to use constants variable

More on generic Scala functions

Round number to specified number of digits

Why is it so uncommon to use type signatures in where clauses?

Why don't Haskell compilers facilitate deterministic memory management?

Trick for “reusing” arguments in Haskell?

Integer to float

Why does Haskell force data constructor's first letter to be upper case?

fmap and “flat map” in Haskell

Folding across Maybes in Haskell

How to install haskell 8 on ubuntu 16.04

Haskell Function Application

How do you make a generic memoize function in Haskell?

Comparing design by contract to type systems

How to get normal value from IO action in Haskell

Haskell caching results of a function

Using a Lens to read multiple fields

Haskell scoping in nested function definitions using where

What is an alternative to a prelude with qualfied imports

Haskell: Lists vs Streams

What are type quantifiers?

How to create a type bounded within a certain range

How to convert Char to Int in Haskell?

Evaluation strategy

Why are monad transformers different to stacking monads?

Why isn't Kleisli an instance of Monoid?

How can I do an HTTPS request in Haskell?

Isn't it redundant for Control.Lens.Setter to wrap types in functors?

Haskell: `Map (a,b) c` versus `Map a (Map b c)`?

Is implementing this words function possible without a postprocessing step after folding?

Cabal install gtk failing

What is going on with the types in this ghci session?

Why is this a useful warning in Haskell when pattern matching? “Defined but not used”

Convert a String list to an Int list

What is the difference between liftM and mapM in Haskell

Trees in Haskell

Why doesn't sortBy take (a -> a -> Bool)?

How to find the longest word in list?

Haskell replace element in list

Why is the type of this function (a -> a) -> a?

Generate a random integer in a range in Haskell without a seed

Implement zip using foldr

What is the role of 'bottom' (⊥) in Haskell function definitions?

Haskell lazy I/O and closing files

Get a sublist in Haskell

Why Haskell range needs spaces when using [LT .. GT]?

Why does Haskell lack a literal Data.Map constructor syntax?

Can't compile haskell project: linking step fails

Reasonably efficient pure-functional matrix product in Haskell?

stack new command failing to download build plan for lts-14.1

Haskell “collections” language design

What is the effect of type synonyms on instances of type classes? What does the TypeSynonymInstances pragma in GHC do?

GHCi ignores type signature

Haskell - pattern matching syntactic sugar and where

How do I take the last n elements of a list

How to catch (and ignore) a call to the error function?

how to increment a variable in functional programming

Extending an existing type in OCaml

Haskell function composition (forward pipe) - why does this work?

Finite automaton in Haskell

Nicely printing/showing a binary tree in Haskell

A basic Monoid definition gives “No instance for (Semigroup MyMonoid) arising from the superclasses of an instance declaration”

Is it possible to get all contexts of a Traversable lazily?

Within Scala, is it possible to alias a type but disallow cross-use of aliased/non-aliased types like Haskell?

What can Arrows do that Monads can't?

Data families vs Injective type families

Why can't GHC derive instances for Monoid?

Is it possible to extend free monad interpreters?

Parsing with user-defined operator precedence

Haskell equivalent to Scala's groupBy

How can I recover sharing in a GADT?

A ghci session without Prelude

How to implement a game loop in reactive-banana?

Why aren't there existentially quantified type variables in GHC Haskell

How to write platform-independent code in Haskell (ghc)

What are hyperfunctions in the context of computer science?

Lens / Prism with error handling

How can I specify which LLVM binaries GHC should use?

How to zip multiple lists in Haskell?

On control flow structures in Haskell (multiple if-then-else)

Haskell: Double every 2nd element in list

How do you write the function 'pairs' in Haskell?

Closed type classes

Haskell Tuple Size Limit

How to find the frequency of characters in a string in Haskell?

Haskell apply single value to a list of functions

Haskell shying away from probabilistic data structures?

How does ap fromMaybe compose?

Writing a C# version of Haskell infinite Fibonacci series function

is there any way for multiple where statement in Haskell

Is it recommended to always have exhaustive pattern matches in Haskell, even for “impossible” cases?

How can I set my GHCi prompt to a lambda character on Windows?

Does Haskell have return type overloading?

If I enter [1/0..1/0] on GHCI I am getting Infinite Infinity. Why?

Merge sort in Haskell

Parsing JSON string into record in Haskell

Haskell read raw keyboard input

Extracting the exponent and mantissa of a Javascript Number

Is “List” specially handled in Haskell's pattern matching?

Haskell lists difference

Why do you have to use both a compiler flag and a run-time flag to get multicore-support in Haskell?

“resource busy (file is locked)” error in Haskell

Sum all numbers from one to a billion in Haskell

Unlike a Functor, a Monad can change shape?

How do I combine monads in Haskell?

Can I print in Haskell the type of a polymorphic function as it would become if I passed to it an entity of a concrete type?

Why is this version of 'fix' more efficient in Haskell?

Are monad laws enforced in Haskell?

Reading large file in haskell?

Haskell Precedence: Lambda and operator

What does ':..' mean in Haskell?

How would I write this function in point-free style?

How to check Haskell infix operator precedence

Haskell mutable map/tree

Haskell: how to tell hlint not to: `Warning: Use string literal`

What does “lax” mean in “lax monoidal functor”?

Haskell: Can I perform several folds over the same lazy list without keeping list in memory?

Why does GHC take so long to link?

Making (a, a) a Functor

In what scenarios does Haskell's `reads` return more than one list item?

Trying out “cabal sandbox init” and cabal not recognizing the command “sandbox”

Haskell: How is join a natural transformation?

Run-time exception when attempting to print a Unicode character

Why can't there be an instance of MonadFix for the continuation monad?

All combinations of elements of two lists in Haskell

Type inference interferes with referential transparency

Haskell Pattern Matching on the Empty Set

Subdividing a list in haskell

Is Haskell's mapM not lazy?

Is there a quick-starting Haskell interpreter suitable for scripting?

Implement reverse in Haskell that runs in linear time

Is there any way to inline a recursive function?

Why can't one put type signatures in instance declarations in Haskell?

Haskell: define list over multiple lines

Haskell and random numbers

Haskell Pattern Matching Fails on Negative Number

A way to avoid a common use of unsafePerformIO

Laziness and tail recursion in Haskell, why is this crashing?

Show progress of Haskell program

GHC: insert compilation date

In Haskell how can you multiply a string?

Is it better to define Functor in terms of Applicative in terms of Monad, or vice versa?

equal sign with haskell literals

Haskell: No instance for (Eq a) arising from a use of `=='

Why is my Haskell code saying 'variable not in scope: main'?

Set vi as editor in GHCi

Haskell: Get data constructor name as string

Are there any LL Parser Generators for Functional Languages such as Haskell or Scala?

Short circuiting (&&) in Haskell

The need for pure in Applicatives

Why Functor class has no return function?

How to import an exclamation point (or other operator) from Haskell module

Is there a good reason why `deleteBy` does not have its most general type?

Is it possible to implement `(Applicative m) => Applicative (StateT s m)`?

max and min with NaN in Haskell

Is there a Haskell/ML-like compiler to C?

Cabal: build dir with source

How do I create an in-memory handle in Haskell?

Avoid warning Defaulting the following constraint(s) to type `Integer'

Can this functionality be implemented with Haskell's type system?

GHC refuses to export qualified modules

What happens to missing type variables in Church-style core?

Why does GHC consider the LHS *syntactically* when inlining?

Expressive and composable error types

What was wrong with Control.MonadPlus.Free?

GHCJS: How do I import a high order javascript function using FFI?

How do I implement a shutdown command in a WAI server?

A category of type-changing substitutions

Benchmarking Filter and Partition

Ways to get the middle of a list in Haskell?

Index of element in list in Haskell

Haskell replace characters in string

Idiomatic way to sum a list of Maybe Int in haskell

Why can applicative functors have side effects, but functors can't?

IO and Maybe monad interaction

Is it bad form to make new types/datas for clarity?

Project Euler - How is this haskell code so fast?

Meaning of “closed under composition”

Double map in haskell?

haskell polymorphism and lists

Permutations of a list - Haskell

State Monad, sequences of random numbers and monadic code

No output will be generated because there is no Main module

Syntax for list construction / concatenation

How much overhead do function calls have in Haskell?

How do you check the type of a local variable?

How do I organize my pure functions with my monadic actions idiomatically

Convert a string representing a binary number to a base 10 string haskell

Checking for empty list in Haskell: Is (length list == 0) or (list == []) more efficient?

What programming languages have something like Haskell’s `newtype`

Grouping in haskell regular expressions

Read case class object from string in Scala (something like Haskell's “read” typeclass)

Haskell: “instance (Enum a, Bounded a) => Random a” and “=> Arbitrary a”

Haskell: converting a list of (a, b) key-value pairs (with possibly repeated keys) to a list of (a, [b]) grouped by key

Why does this Haskell code compile?

PCRE in Haskell - what, where, how?

Software Transactional Memory - Composability Example

How do I make a do block return early?

Why is this Haskell code snippet not infinitely recursive?

Writing in pointfree style f x = g x x

Call main function with arguments

C++ equivalent of algebraic datatype?

(emulated) Macros in Haskell?

Binding functions that take multiple arguments

Is there some directory walker in Haskell?

newtype with RankNTypes

How do i use runhaskell with cabal-dev?

how to install modules in haskell

What is the lifetime of a memoized value in a functional language like Haskell?

Type error with rank-2 types and function composition

Many types of String (ByteString)

Can I tell which ghc version a program was built with?

Memory leak in recursive IO function - PAP

Why do all Haskell typeclasses have laws?

Optimization of Function Calls in Haskell

Haskell let expression converges while similar expression using fix does not

Why does a more general type affect runtime in Haskell?

Am I using reactive-banana right?

Get a Haskell record's field names as a list of strings?

Is coproduct the same as sum types?

LHS and Markdown: Codeblocks

Why the cycle function cannot work with empty list?

GHC -ddump-splices option — Template Haskell

Lazy Pattern matching in Data.List

How to write fixed point build rules in Shake, e.g. Latex

How do I write a Data.Vector.Unboxed instance in Haskell?

Why isn't every type part of Eq in Haskell?

What is a good reason to use a type signature for functions when the compiler can infer the types

How would you define map and filter using foldr in Haskell?

What are some better ways to write [(-1,-1),(-1,0),(-1,1),(0,-1),(0,1),(1,-1),(1,0),(1,1)] in Haskell?

Zipping same value over a list of tuples Haskell

Haskell: Detect current OS

Read from stdin in Haskell using IO.readLn

What do people use the identity function for?

How to compose a binary function with a unary function?

What's the practical value of all those newtype wrappers in `Data.Monoid`?

Calculating list cumulative sum in Haskell

Shorter way to write this code

How do I do automatic data serialization of data objects?

Can compilers deduce/prove mathematically?

Why is init a partial function?

Replacing “->”s with “→”s, “=>”s with “⇒”s and so on in Haskell

How could I remove the “if … then … else …” keywords in Haskell (GHC)?

Foldr/Foldl for free when Tree is implementing Foldable foldMap?

Please explain in the simplest, most jargon-free English possible, the “universal property of fold”?

export from module

Two parameter memoization in Haskell

When is a generic function not generic?

Why is there only one non-strict function from Int to Int?

How to tell QuickCheck to generate only valid list indices for a parameter?

In Haskell, I want to read a file and then write to it. Do I need strictness annotation?

Haskell: Parse error: module header, import declaration or top-level declaration expected

Comparing Haskell and Scala Bind/Flatmap Examples

Killing a Haskell binary

haskell - let/where equivalent within list comprehension?

Function Composition in R (and high level functions)

How to avoid superfluous variables in do notation?

Haskell pattern match “diverge” and ⊥

Cabal to setup a new Haskell project?

How to decorate a Tree in Haskell

Haskell $! operator and infinite lists

Is there a name for this function or pattern?

Lazily Tying the Knot for 1 Dimensional Dynamic Programming

Control.Parallel compile issue in Haskell

How to convert a Integer to a ByteString in Haskell

How do I get to haskell to output numbers NOT in scientific notation?

Bug in Data.Map implementation?

Assigning literals to terms in GHC

How do you manage an object graph in Haskell?

Tracking down errors in Haskell

How to upgrade gtk2hsC2hs?

Scheduling a Timeout in Haskell

GHC Generating Redundant Core Operations

why are the state and reader monads functions while the writer monad is a tuple?

Applying a fixed-length-vector-function to the inital part of a longer fixed-length-vector

How does one statisfy a class constraint in an instance of a class that requires a type constructor rather than a concrete type?

How to find out GHC's memory representations of data types?

No cradle found for filename.hs. Proceeding with implicit cradle

How am I meant to split code between src/Lib.hs and app/Main.hs in a new stack project?

Polymorphism within higher-order functions?

What is the haskell way to copy a directory

Mutable Array in GHC Compact Region

Haskell Cabal: “package indirectly depends on multiple versions of the same package”

Is there a van Laarhoven representation of `Optional`

How to trace back parsing errors with Aeson? [+Answer]

Is it possible to introduce additional type variables into a superclass-constraint?

“Data types à la carte” vs. nested FreeT transformers

How to type cast

Zip with default value instead of dropping values?

How to abstract over a “back and forth” transformation?

Stack overflow in OCaml and F# but not in Haskell

Removing duplication (with Applicative ((->) t), perhaps?)

Haskell: surprising behavior of “groupBy”

How does Haskell process a list?

Haskell: type inference and function composition

Temporary namespace/context in Haskell

I/O in Haskell is Functional?

Finding maximum of a list of lists by sum of elements in Python

How can I print a newline properly in Haskell?

How to find the number of cores at runtime in Haskell

Better way to write the following program in Haskell

How can I speed up my Haskell program (to the level of Python)

json parsing in haskell

Poor performance parsing binary file in haskell

Is Erlang “single assignment” different from Haskell “immutable values”?

How do I define a data type that only accepts numbers?

what is the meaning of “let x = x in x” and “data Float#” in GHC.Prim in Haskell

Understanding Type of IO () in `let` Expression

Showing two different fibonacci functions are equivalent

How do you do an in-place quicksort in Haskell

Monadic expressions in conditionals - GHC compiles, cabal refuses

Efficient table for Dynamic Programming in Haskell

How to avoid OOP deep class hierarchies when switching to Haskell?

Is it good style to use a case expression on a Unit value just to use guards?

What's the way to determine if an Int is a perfect square in Haskell?

Is `x >> pure y` equivalent to `liftM (const y) x`

How to avoid quadratic explosion of typeclass instances?

Are mapM and forM interchangeable?

What's with the 'in' keyword?

Defining variables inside a function Haskell

Haskell: Check if integer, or check type of variable

Haskell Time Limit on Evaluation

What's the cleanest way to do case-insensitive parsing with Text.Combinators.Parsec?

Haskell pattern match on type

Seething over MSYS shell - is it replaceable?

Return specific type within Haskell

How to compare two lists in Haskell?

How to use MonadRandom?

Extracting a Maybe value in IO

Writing a high order function to capture common pattern haskell

How to set current directory in GHCi?

Haskell newtype with parentheses

Why does Haskell stop short of inferring the datatype's typeclasses in the function signatures?

Type classes in Haskell data types

Restricting a monad to a type class

How is Ratio implemented in Haskell?

“inject” progress logging/tracing in haskell computation?

Haskell - Is effect order deterministic in case of Applicative?

How do I handle the Maybe result of at in Control.Lens.Indexed without a Monoid instance

Why are `take` and `drop` defined for negative arguments?

Pattern-matching Seq's in Haskell

Why can Haskell not handle characters from a specific website?

How can I elegantly invert a Map's keys and values?

Using Haskell's type system to enforce modularity

GADT's failed exhaustiveness checking

Output Integer to stdout in Haskell

Standard way of joining two Data.Texts without `mappend`

Does Haskell have a splat operator like Python and Ruby?

What is AllowAmbiguousTypes and why is it needed in this “forall” example?

Select which test to run with Hspec and stack

How to format UTCTime as ISO 8601 in Haskell

How to take out a value out of a monad in Haskell?

Any way to print out a type of a variable in a do / while / let block?

How to specify dependency on external C library in .cabal?

Since “fold” isn't powerful enough to write a tree pretty-printer with indentation, what high-order combinator is?

Nondeterminism for infinite inputs

Haskell: How to parse an IO input string into a Float (or Int or whatever)?

Defining Eq instance for Haskell GADTs

Proper way to import things already defined in the Prelude in Haskell

Type class constraint on type family instances

Pseudo-quicksort time complexity

Which haskell library will let me save a 2D array/vector to a png/jpg/gif… file?

Polyvariadic Functions in Haskell

Transforming a function to point-free style changes its type

Clojure's substitute for Haskell's ADTs and pattern matching?

How to selectively link certain system libraries statically into Haskell program binary?

A point-free function is shared, yet evaluated twice

Is there a way to get version of Cabal package in source code of the package?

Is it possible to use extended precision (80-bit) floating point arithmetic in GHC/Haskell?

Eliminate Haskell array bounds check for Bounded type?

Managing a stateful computation system in Haskell

OCaml functors, Haskell type classes, and multiple derivation

Haskell vector C++ push_back analogue

Free Monad of a Monad

Haskell Typeclass for Tuples

Frege's equivalent of Haskell's getLine and read

documentation for cabal-install configuration file

List of items of types restricted by typeclass

Haskell record syntax and type classes

Functor is for (a -> b) -> (f a -> f b), what is for (Category c) => c a b -> c (f a) (f b)?

Total real-time persistent queues

Haskell explicit recursion vs `iterate`

Should a Haskell parser allow Unicode digits in numeric literals?

Efficient parallel strategies

How to implement Dijkstra Algorithm in Haskell

How to keep very big elements on memory without exhausting the garbage collector?

Why is there not 'Alternative' instance for 'Control.Applicative.Const'

Can the continuation monad transformer be given an Alternative instance with some and many?

Why can you reverse list with foldl, but not with foldr in Haskell

Problems on migrating from functional to OO

Haskell Monad Transformer Stack and Type Signatures

Can 'all' be applied to a list of Maybe?

What does eta reduce mean in the context of HLint

how to list all files in current directory

Why is Identity monad useful?

Haskell - Counting how many times each distinct element in a list occurs

'Repeat' in Haskell?

How does Haskell deal with documentation?

An example of using Data.Map in Haskell

Can Haskell optimize function calls the same way Clang / GCC does?

Haskell - alternating elements from two lists

need to know what <*> <$> and . do in haskell

Why doesn't Haskell sequence these IO actions properly?

Generate function of given arity in Haskell using type numbers

Applicative functors other than monads and ZipList?

Has the Control.Monad.State API changed recently?

Sort a list of tuples by their second elements

Modular Program Design - Combining Monad Transformers in Monad Agnostic functions

Proper way to treat global flags in Haskell

Space leak in list program

Cannot derive a Show instance for data containing UTCTime

Lists in Haskell : data type or abstract data type?

Parsec: Consume all input

Haskell “exceptions”

Is it possible to force a type to a class in Haskell?

Can Haskell programs be represented as Lisp S-expressions?

Using hoogle in a haskell development environment on nix

Does a useful Haskell HashMap/HashTable/Dictionary library exist?

Any nice tools for untying knots in Haskell?

Haskell: Computation “in a monad” — meaning?

Haskell *qualified* import of a set of functions

How to zip lists with different length?

Generating a lists of a specific length with Haskell's QuickCheck

Polymorphism inside monads

Haskell type signature in lambda expression

Automatic instance deriving after declaration

XTypeOperators extension doesn't work as pragma

How to reuse a type variable in an inner type declaration

Haskell-like pattern matching in Raku

Efficient way to write ordering instances?

Can't make a derived instance of Num

Type signature in a where clause

Please confirm or correct my “English interpretation” of this Haskell code snippet

Is it possible to iterate the application of a non-endomorphism?

Is there any way to use IO Bool in if-statement without binding to a name in haskell?

What is the scope of let when used without in?

Why does the Data.String.IsString typeclass only define one conversion?

Haskell FlatMap

How long does it take to create 1 million threads in Haskell?

Pattern match list with exactly 2 elements in Haskell

How to dump GHC simplifier output in human-readable form?

List based on right Kan extension

Questions on a Haskell -> C# conversion

How to get the current module name in Haskell

Maybe constructing data from Maybes

Idiomatic bidirectional Pipes with downstream state without loss

Question about the ~ and @ operators in Haskell

STM monad problem

Could not deduce (Semigroup (Optional a)) arising from the superclasses of an instance declaration

Should Latitude, Longitude and Elevation have their own type in Haskell?

Applicative instance for free monad

Haskell: Algebraic data vs Tuple

The state monad and learnyouahaskell.com

Haskell laziness - how do I force the IO to happen sooner?

How to use HUnit and Cabal to do Automated Testing?

How lazy is Haskell's `++`?

What good is Control.Category?

Ambiguous module name `Prelude'

Parsing Indentation-based syntaxes in Haskell's Parsec

Handling events in Haskell

Catching Control-C exception in GHC (Haskell)

What happens under the hood with `deriving` in Haskell?

Is there a better performing alternative to read and show in Haskell?

What are structures with “subtraction” but no inverse?

Why is Data.List.genericLength implemented as a right fold?

Cabal Test Suite with type detailed example

How to parse nested JSON with aeson

Why is the undefined function levity-polymorphic when using it with unboxed types?

Why aren't monad transformers constrained to yield monads?

How can I test a higher-order function using QuickCheck?

Can I add an instance declaration in GHCi

How to get size of file in Haskell using hFileSize

Find inferred type for local function

GHC rewrite rules with class constraints

Why isn't the Prelude's words function written more simply?

Kind Demotion (as opposed to Kind Promotion)

When (and when not) to define a Monad

How to put constraints on the associated data?

Find the value that failed for quickcheck

How to write a simple HTTP server in Haskell using Network.HTTP.receiveHTTP

Multi-input, multi-output compilers with Shake

Redefine IO to simplify debugging?

Haskell: Format number with comma seperators

Why is there no MonadMask instance for ExceptT?

What advantages do StableNames have over reallyUnsafePtrEquality#, and vice versa?

How to display a backtrace for an Error thrown in Haskell

Is this always true: fmap (foldr f z) . sequenceA = foldr (liftA2 f) (pure z)

Quirkiness in Haskell 7.8.3

Modeling time as lazy numbers

How can I fuse two maps over the same list?

The Genuine Sieve of Eratosthenes — algorithm used to generate prime numbers

Derivative Towers and how to use the vector-space package (haskell)

Slowdown when using parallel strategies in Haskell

How is this memoized DP table too slow for SPOJ?

Algorithm - How to delete duplicate elements in a list efficiently?

Determining if a given number is a prime in haskell

Standard Haskell function :: (a -> Maybe b) -> [a] -> Maybe b

Simple word count in haskell

How to edit nth element in a Haskell list?

Defining function signature in GHCi

Why does this Haskell code not terminate?

Unwrapping datatypes in Haskell without extraneous code

Screen capture in Haskell?

Haskell: What is the difference between (+1) and (\x->x+1)?

Partial Application with Infix Functions

Generate list of random values and also get a new generator

Fixed point combinator in Haskell

“Pattern matching” of algebraic type data constructors

Can GHC warn if class instance is a loop?

Tacit function composition in Haskell

How do I get the sums of the digits of a large number in Haskell?

Why does the pointfree version of this function look like this?

Can Haskell's Control.Concurrent.Async.mapConcurrently have a limit?

The “handle” function and Real World Haskell

zlib build error with GHC

MonadPlus definition for Haskell IO

What's the difference between a lens and a partial lens?

What does uncurry ($) do?

Haskell concurrency - is forkIO really nondeterministic?

Haskell: where clause referencing bound variables in lambda

Does an unused let binding have any effect in Haskell?

Can I disable the “non-exhaustive pattern matches” warning only for lambdas?

Haskell: Prefer pattern-matching or member access?

Flags in cabal files

Record types with multiple constructors in haskell

yesod - getting the request body for a POST “Content-type: application/json”

GHC version check in code

Select random element from a set, faster than linear time (Haskell)

How can I use Control.Lens to update the ith element of a list?

how to write a derivable class?

“=~” raise “No instance for (RegexContext Regex [Char] [String])”

Haskell - sortBy function

Overriding (==) in Haskell

Using alex/happy with Cabal

difference between isNothing and (== Nothing) in Haskell?

make function with 'if' point-free

Getting all the diagonals of a matrix in Haskell

Function composition in Haskell with tuple arguments

Guarded Equations in Haskell

Common programming mistakes for Haskell developers to avoid?

What is the type of return 5 in Haskell when no context is given?

How to make Haskell or ghci able to show Chinese characters and run Chinese characters named scripts?

Repacking monads — any generic way?

Creating functions over Enumerations

Can't install diagrams/arithmoi on Mac

Is this a safe use of unsafeCoerce?

Parser library that can handle ambiguity

cabal install … failing - osx - many unsatisfied packages

Is there an instance of Monad but not of MonadFix?

Which is the preferred method for writing “guards”?

Concise if-then-else notation in do-blocks in Haskell

What is the most efficient purely functional algorithm for generating all prefixes of a list?

Is there a way to get a Haskell setup on Windows without an installation? (Copy + paste)

hGetContents being too lazy

Why is Haskell monadic bind left-associative?

Data.ByteString.Lazy.Internal.ByteString to string?

Why is not GHC optimizing for constants?

C vs Haskell Collatz conjecture speed comparison

Haskell's Arrow-Class in Agda and -> in Agda

Haskell program aborts with “loop” but I think it shouldn't

Haskell, Aeson & JSON parsing into custom type

What are lifted and unlifted product types in Haskell?

Optimising Haskell data reading from file

Haskell space usage compile time restrictions

Haskell - List of instances of a Typeclass

How do I get consistent criterion benchmarks, or interpret results across runs?

How to implement the equivalent of Go's select statement for Haskell STM channels?

`cabal update` failed due to `out of memory`

How to convert between ByteString and Storable Vector?

Do guarded pipes behave the same as pipes using await?

Haskell “not a visible field of constructor” error

Is there a name for a function that takes a piece of data and a list of functions and applies each function to the result of the last one?

Catching/hijacking stdout in haskell

Does Data.ByteString.readFile block all threads?

Can I make haskell GADT data constructor infix in derived Show?

Does yesod uses the processor when idle?

Force pre-computation of a constant

How to run Haskell on OSX El Capitan

Can functional reactive programming (FRP) be expressed using monads?

How to apply data parallelim on haskell Fast Fourier Transformation?

In Parsec, is there a way to prevent lexeme from consuming newlines?

Haskell: “Not in scope: '>>'” with no implicit prelude

xmonad vertical resize tile/window

testing in functional programming

When is UndecidableInstances safe? Some general questions regarding the GHC extension

Normalized and immutable data model

How is FRP handled in terms of memory?

Remove border from fullscreen floating windows only (XMonad configuration)

How do I define a composite key in Persistent

Variadic compose function?

How to upgrade GHC with Stack

How to disambiguate selector function?

What is the connection between primitive recursion and catamorphisms?

Representing sum types in sql with Persistent, and Esqueleto joins

haskell - Average floating point error using QuickCheck

Combine two monads when neither has a transformer?

In Haskell, (+) is a function, ((+) 2) is a function, ((+) 2 3) is 5. What exactly is going on there?

Haskell: monadic takeWhile?

Ambiguous Occurrence

Finite automaton in Haskell

Nicely printing/showing a binary tree in Haskell

A basic Monoid definition gives “No instance for (Semigroup MyMonoid) arising from the superclasses of an instance declaration”

Is it possible to get all contexts of a Traversable lazily?

Within Scala, is it possible to alias a type but disallow cross-use of aliased/non-aliased types like Haskell?

What can Arrows do that Monads can't?

Data families vs Injective type families

Why can't GHC derive instances for Monoid?

Is it possible to extend free monad interpreters?

Parsing with user-defined operator precedence

Haskell equivalent to Scala's groupBy

How can I recover sharing in a GADT?

A ghci session without Prelude

How to implement a game loop in reactive-banana?

Why aren't there existentially quantified type variables in GHC Haskell

How to write platform-independent code in Haskell (ghc)

What are hyperfunctions in the context of computer science?

Lens / Prism with error handling

How can I specify which LLVM binaries GHC should use?

How to zip multiple lists in Haskell?

On control flow structures in Haskell (multiple if-then-else)

Haskell: Double every 2nd element in list

How do you write the function 'pairs' in Haskell?

Closed type classes

Haskell Tuple Size Limit

How to find the frequency of characters in a string in Haskell?

Haskell apply single value to a list of functions

Haskell shying away from probabilistic data structures?

How does ap fromMaybe compose?

Writing a C# version of Haskell infinite Fibonacci series function

is there any way for multiple where statement in Haskell

Is it recommended to always have exhaustive pattern matches in Haskell, even for “impossible” cases?

How can I set my GHCi prompt to a lambda character on Windows?

Does Haskell have return type overloading?

If I enter [1/0..1/0] on GHCI I am getting Infinite Infinity. Why?

Merge sort in Haskell

Parsing JSON string into record in Haskell

Haskell read raw keyboard input

Extracting the exponent and mantissa of a Javascript Number

Is “List” specially handled in Haskell's pattern matching?

Haskell lists difference

Why do you have to use both a compiler flag and a run-time flag to get multicore-support in Haskell?

“resource busy (file is locked)” error in Haskell

Sum all numbers from one to a billion in Haskell

Unlike a Functor, a Monad can change shape?

How do I combine monads in Haskell?

Can I print in Haskell the type of a polymorphic function as it would become if I passed to it an entity of a concrete type?

Why is this version of 'fix' more efficient in Haskell?

Are monad laws enforced in Haskell?

Reading large file in haskell?

Haskell Precedence: Lambda and operator

What does ':..' mean in Haskell?

How would I write this function in point-free style?

How to check Haskell infix operator precedence

Haskell mutable map/tree

Haskell: how to tell hlint not to: `Warning: Use string literal`

What does “lax” mean in “lax monoidal functor”?

Haskell: Can I perform several folds over the same lazy list without keeping list in memory?

Why does GHC take so long to link?

Making (a, a) a Functor

In what scenarios does Haskell's `reads` return more than one list item?

Trying out “cabal sandbox init” and cabal not recognizing the command “sandbox”

Haskell: How is join a natural transformation?

Run-time exception when attempting to print a Unicode character

Why can't there be an instance of MonadFix for the continuation monad?

All combinations of elements of two lists in Haskell

Type inference interferes with referential transparency

Haskell Pattern Matching on the Empty Set

Subdividing a list in haskell

Is Haskell's mapM not lazy?

Is there a quick-starting Haskell interpreter suitable for scripting?

Implement reverse in Haskell that runs in linear time

Is there any way to inline a recursive function?

Why can't one put type signatures in instance declarations in Haskell?

Haskell: define list over multiple lines

Haskell and random numbers

Haskell Pattern Matching Fails on Negative Number

A way to avoid a common use of unsafePerformIO

Laziness and tail recursion in Haskell, why is this crashing?

Show progress of Haskell program

GHC: insert compilation date

In Haskell how can you multiply a string?

Is it better to define Functor in terms of Applicative in terms of Monad, or vice versa?

equal sign with haskell literals

Haskell: No instance for (Eq a) arising from a use of `=='

Why is my Haskell code saying 'variable not in scope: main'?

Set vi as editor in GHCi

Haskell: Get data constructor name as string

Are there any LL Parser Generators for Functional Languages such as Haskell or Scala?

Short circuiting (&&) in Haskell

The need for pure in Applicatives

Why Functor class has no return function?

How to import an exclamation point (or other operator) from Haskell module

Is there a good reason why `deleteBy` does not have its most general type?

Is it possible to implement `(Applicative m) => Applicative (StateT s m)`?

max and min with NaN in Haskell

Is there a Haskell/ML-like compiler to C?

Cabal: build dir with source

How do I create an in-memory handle in Haskell?

Avoid warning Defaulting the following constraint(s) to type `Integer'

Can this functionality be implemented with Haskell's type system?

GHC refuses to export qualified modules

What happens to missing type variables in Church-style core?

Why does GHC consider the LHS *syntactically* when inlining?

Expressive and composable error types

What was wrong with Control.MonadPlus.Free?

GHCJS: How do I import a high order javascript function using FFI?

How do I implement a shutdown command in a WAI server?

A category of type-changing substitutions

Benchmarking Filter and Partition

Ways to get the middle of a list in Haskell?

Index of element in list in Haskell

Haskell replace characters in string

Idiomatic way to sum a list of Maybe Int in haskell

Why can applicative functors have side effects, but functors can't?

IO and Maybe monad interaction

Is it bad form to make new types/datas for clarity?

Project Euler - How is this haskell code so fast?

Meaning of “closed under composition”

Double map in haskell?

haskell polymorphism and lists

Permutations of a list - Haskell

State Monad, sequences of random numbers and monadic code

No output will be generated because there is no Main module

Syntax for list construction / concatenation

How much overhead do function calls have in Haskell?

How do you check the type of a local variable?

How do I organize my pure functions with my monadic actions idiomatically

Convert a string representing a binary number to a base 10 string haskell

Checking for empty list in Haskell: Is (length list == 0) or (list == []) more efficient?

What programming languages have something like Haskell’s `newtype`

Grouping in haskell regular expressions

Read case class object from string in Scala (something like Haskell's “read” typeclass)

Haskell: “instance (Enum a, Bounded a) => Random a” and “=> Arbitrary a”

Haskell: converting a list of (a, b) key-value pairs (with possibly repeated keys) to a list of (a, [b]) grouped by key

Why does this Haskell code compile?

PCRE in Haskell - what, where, how?

Software Transactional Memory - Composability Example

How do I make a do block return early?

Why is this Haskell code snippet not infinitely recursive?

Writing in pointfree style f x = g x x

Call main function with arguments

C++ equivalent of algebraic datatype?

(emulated) Macros in Haskell?

Binding functions that take multiple arguments

Is there some directory walker in Haskell?

newtype with RankNTypes

How do i use runhaskell with cabal-dev?

how to install modules in haskell

What is the lifetime of a memoized value in a functional language like Haskell?

Type error with rank-2 types and function composition

Many types of String (ByteString)

Can I tell which ghc version a program was built with?

Memory leak in recursive IO function - PAP

Why do all Haskell typeclasses have laws?

Optimization of Function Calls in Haskell

Haskell let expression converges while similar expression using fix does not

Why does a more general type affect runtime in Haskell?

Am I using reactive-banana right?

Get a Haskell record's field names as a list of strings?

Is coproduct the same as sum types?

LHS and Markdown: Codeblocks

Why the cycle function cannot work with empty list?

GHC -ddump-splices option — Template Haskell

Lazy Pattern matching in Data.List

How to write fixed point build rules in Shake, e.g. Latex

How do I write a Data.Vector.Unboxed instance in Haskell?

Why isn't every type part of Eq in Haskell?

What is a good reason to use a type signature for functions when the compiler can infer the types

How would you define map and filter using foldr in Haskell?

What are some better ways to write [(-1,-1),(-1,0),(-1,1),(0,-1),(0,1),(1,-1),(1,0),(1,1)] in Haskell?

Zipping same value over a list of tuples Haskell

Haskell: Detect current OS

Read from stdin in Haskell using IO.readLn

What do people use the identity function for?

How to compose a binary function with a unary function?

What's the practical value of all those newtype wrappers in `Data.Monoid`?

Calculating list cumulative sum in Haskell

Shorter way to write this code

How do I do automatic data serialization of data objects?

Can compilers deduce/prove mathematically?

Why is init a partial function?

Replacing “->”s with “→”s, “=>”s with “⇒”s and so on in Haskell

How could I remove the “if … then … else …” keywords in Haskell (GHC)?

Foldr/Foldl for free when Tree is implementing Foldable foldMap?

Please explain in the simplest, most jargon-free English possible, the “universal property of fold”?

export from module

Two parameter memoization in Haskell

When is a generic function not generic?

Why is there only one non-strict function from Int to Int?

How to tell QuickCheck to generate only valid list indices for a parameter?

In Haskell, I want to read a file and then write to it. Do I need strictness annotation?

Haskell: Parse error: module header, import declaration or top-level declaration expected

Comparing Haskell and Scala Bind/Flatmap Examples

Killing a Haskell binary

haskell - let/where equivalent within list comprehension?

Function Composition in R (and high level functions)

How to avoid superfluous variables in do notation?

Haskell pattern match “diverge” and ⊥

Cabal to setup a new Haskell project?

How to decorate a Tree in Haskell

Haskell $! operator and infinite lists

Is there a name for this function or pattern?

Lazily Tying the Knot for 1 Dimensional Dynamic Programming

Control.Parallel compile issue in Haskell

How to convert a Integer to a ByteString in Haskell

How do I get to haskell to output numbers NOT in scientific notation?

Bug in Data.Map implementation?

Assigning literals to terms in GHC

How do you manage an object graph in Haskell?

Tracking down errors in Haskell

How to upgrade gtk2hsC2hs?

Scheduling a Timeout in Haskell

GHC Generating Redundant Core Operations

why are the state and reader monads functions while the writer monad is a tuple?

Applying a fixed-length-vector-function to the inital part of a longer fixed-length-vector

How does one statisfy a class constraint in an instance of a class that requires a type constructor rather than a concrete type?

How to find out GHC's memory representations of data types?

No cradle found for filename.hs. Proceeding with implicit cradle

How am I meant to split code between src/Lib.hs and app/Main.hs in a new stack project?

Polymorphism within higher-order functions?

What is the haskell way to copy a directory

Mutable Array in GHC Compact Region

Haskell Cabal: “package indirectly depends on multiple versions of the same package”

Is there a van Laarhoven representation of `Optional`

How to trace back parsing errors with Aeson? [+Answer]

Is it possible to introduce additional type variables into a superclass-constraint?

“Data types à la carte” vs. nested FreeT transformers

How to type cast

Zip with default value instead of dropping values?

How to abstract over a “back and forth” transformation?

Stack overflow in OCaml and F# but not in Haskell

Removing duplication (with Applicative ((->) t), perhaps?)

Haskell: surprising behavior of “groupBy”

How does Haskell process a list?

Haskell: type inference and function composition

Temporary namespace/context in Haskell

I/O in Haskell is Functional?

Finding maximum of a list of lists by sum of elements in Python

How can I print a newline properly in Haskell?

How to find the number of cores at runtime in Haskell

Better way to write the following program in Haskell

How can I speed up my Haskell program (to the level of Python)

json parsing in haskell

Poor performance parsing binary file in haskell

Is Erlang “single assignment” different from Haskell “immutable values”?

How do I define a data type that only accepts numbers?

what is the meaning of “let x = x in x” and “data Float#” in GHC.Prim in Haskell

Understanding Type of IO () in `let` Expression

Showing two different fibonacci functions are equivalent

How do you do an in-place quicksort in Haskell

Monadic expressions in conditionals - GHC compiles, cabal refuses

Efficient table for Dynamic Programming in Haskell

How to avoid OOP deep class hierarchies when switching to Haskell?

Is it good style to use a case expression on a Unit value just to use guards?

What's the way to determine if an Int is a perfect square in Haskell?

Is `x >> pure y` equivalent to `liftM (const y) x`

How to avoid quadratic explosion of typeclass instances?

Are mapM and forM interchangeable?

What's with the 'in' keyword?

Defining variables inside a function Haskell

Haskell: Check if integer, or check type of variable

Haskell Time Limit on Evaluation

What's the cleanest way to do case-insensitive parsing with Text.Combinators.Parsec?

Haskell pattern match on type

Seething over MSYS shell - is it replaceable?

Return specific type within Haskell

How to compare two lists in Haskell?

How to use MonadRandom?

Extracting a Maybe value in IO

Writing a high order function to capture common pattern haskell

How to set current directory in GHCi?

Haskell newtype with parentheses

Why does Haskell stop short of inferring the datatype's typeclasses in the function signatures?

Type classes in Haskell data types

Restricting a monad to a type class

How is Ratio implemented in Haskell?

“inject” progress logging/tracing in haskell computation?

Haskell - Is effect order deterministic in case of Applicative?

How do I handle the Maybe result of at in Control.Lens.Indexed without a Monoid instance

Why are `take` and `drop` defined for negative arguments?

Pattern-matching Seq's in Haskell

Why can Haskell not handle characters from a specific website?

How can I elegantly invert a Map's keys and values?

Using Haskell's type system to enforce modularity

GADT's failed exhaustiveness checking

Output Integer to stdout in Haskell

Standard way of joining two Data.Texts without `mappend`

Does Haskell have a splat operator like Python and Ruby?

What is AllowAmbiguousTypes and why is it needed in this “forall” example?

Select which test to run with Hspec and stack

How to format UTCTime as ISO 8601 in Haskell

How to take out a value out of a monad in Haskell?

Any way to print out a type of a variable in a do / while / let block?

How to specify dependency on external C library in .cabal?

Since “fold” isn't powerful enough to write a tree pretty-printer with indentation, what high-order combinator is?

Nondeterminism for infinite inputs

Haskell: How to parse an IO input string into a Float (or Int or whatever)?

Defining Eq instance for Haskell GADTs

Proper way to import things already defined in the Prelude in Haskell

Type class constraint on type family instances

Pseudo-quicksort time complexity

Which haskell library will let me save a 2D array/vector to a png/jpg/gif… file?

Polyvariadic Functions in Haskell

Transforming a function to point-free style changes its type

Clojure's substitute for Haskell's ADTs and pattern matching?

How to selectively link certain system libraries statically into Haskell program binary?

A point-free function is shared, yet evaluated twice

Is there a way to get version of Cabal package in source code of the package?

Is it possible to use extended precision (80-bit) floating point arithmetic in GHC/Haskell?

Eliminate Haskell array bounds check for Bounded type?

Managing a stateful computation system in Haskell

OCaml functors, Haskell type classes, and multiple derivation

Haskell vector C++ push_back analogue

Free Monad of a Monad

Haskell Typeclass for Tuples

Frege's equivalent of Haskell's getLine and read

documentation for cabal-install configuration file

List of items of types restricted by typeclass

Haskell record syntax and type classes

Functor is for (a -> b) -> (f a -> f b), what is for (Category c) => c a b -> c (f a) (f b)?

Total real-time persistent queues

Haskell explicit recursion vs `iterate`

Should a Haskell parser allow Unicode digits in numeric literals?

Efficient parallel strategies

How to implement Dijkstra Algorithm in Haskell

How to keep very big elements on memory without exhausting the garbage collector?

Why is there not 'Alternative' instance for 'Control.Applicative.Const'

Can the continuation monad transformer be given an Alternative instance with some and many?

Why can you reverse list with foldl, but not with foldr in Haskell

Problems on migrating from functional to OO

Haskell Monad Transformer Stack and Type Signatures

Can 'all' be applied to a list of Maybe?

What does eta reduce mean in the context of HLint

how to list all files in current directory

Why is Identity monad useful?

Haskell - Counting how many times each distinct element in a list occurs

'Repeat' in Haskell?

How does Haskell deal with documentation?

An example of using Data.Map in Haskell

Can Haskell optimize function calls the same way Clang / GCC does?

Haskell - alternating elements from two lists

need to know what <*> <$> and . do in haskell

Why doesn't Haskell sequence these IO actions properly?

Generate function of given arity in Haskell using type numbers

Applicative functors other than monads and ZipList?

Has the Control.Monad.State API changed recently?

Sort a list of tuples by their second elements

Modular Program Design - Combining Monad Transformers in Monad Agnostic functions

Proper way to treat global flags in Haskell

Space leak in list program

Cannot derive a Show instance for data containing UTCTime

Lists in Haskell : data type or abstract data type?

Parsec: Consume all input

Haskell “exceptions”

Is it possible to force a type to a class in Haskell?

Can Haskell programs be represented as Lisp S-expressions?

Using hoogle in a haskell development environment on nix

Does a useful Haskell HashMap/HashTable/Dictionary library exist?

Any nice tools for untying knots in Haskell?

Haskell: Computation “in a monad” — meaning?

Haskell *qualified* import of a set of functions

How to zip lists with different length?

Generating a lists of a specific length with Haskell's QuickCheck

Polymorphism inside monads

Haskell type signature in lambda expression

Automatic instance deriving after declaration

XTypeOperators extension doesn't work as pragma

How to reuse a type variable in an inner type declaration

Haskell-like pattern matching in Raku

Efficient way to write ordering instances?

Can't make a derived instance of Num

Type signature in a where clause

Please confirm or correct my “English interpretation” of this Haskell code snippet

Is it possible to iterate the application of a non-endomorphism?

Is there any way to use IO Bool in if-statement without binding to a name in haskell?

What is the scope of let when used without in?

Why does the Data.String.IsString typeclass only define one conversion?

Haskell FlatMap

How long does it take to create 1 million threads in Haskell?

Pattern match list with exactly 2 elements in Haskell

How to dump GHC simplifier output in human-readable form?

List based on right Kan extension

Questions on a Haskell -> C# conversion

How to get the current module name in Haskell

Maybe constructing data from Maybes

Idiomatic bidirectional Pipes with downstream state without loss

Question about the ~ and @ operators in Haskell

STM monad problem

Could not deduce (Semigroup (Optional a)) arising from the superclasses of an instance declaration

Should Latitude, Longitude and Elevation have their own type in Haskell?

Applicative instance for free monad

Haskell: Algebraic data vs Tuple

The state monad and learnyouahaskell.com

Haskell laziness - how do I force the IO to happen sooner?

How to use HUnit and Cabal to do Automated Testing?

How lazy is Haskell's `++`?

What good is Control.Category?

Ambiguous module name `Prelude'

Parsing Indentation-based syntaxes in Haskell's Parsec

Handling events in Haskell

Catching Control-C exception in GHC (Haskell)

What happens under the hood with `deriving` in Haskell?

Is there a better performing alternative to read and show in Haskell?

What are structures with “subtraction” but no inverse?

Why is Data.List.genericLength implemented as a right fold?

Cabal Test Suite with type detailed example

How to parse nested JSON with aeson

Why is the undefined function levity-polymorphic when using it with unboxed types?

Why aren't monad transformers constrained to yield monads?

How can I test a higher-order function using QuickCheck?

Can I add an instance declaration in GHCi

How to get size of file in Haskell using hFileSize

Find inferred type for local function

GHC rewrite rules with class constraints

Why isn't the Prelude's words function written more simply?

Kind Demotion (as opposed to Kind Promotion)

When (and when not) to define a Monad

How to put constraints on the associated data?

Find the value that failed for quickcheck

How to write a simple HTTP server in Haskell using Network.HTTP.receiveHTTP

Multi-input, multi-output compilers with Shake

Redefine IO to simplify debugging?

Haskell: Format number with comma seperators

Why is there no MonadMask instance for ExceptT?

What advantages do StableNames have over reallyUnsafePtrEquality#, and vice versa?

How to display a backtrace for an Error thrown in Haskell

Is this always true: fmap (foldr f z) . sequenceA = foldr (liftA2 f) (pure z)

Quirkiness in Haskell 7.8.3

Modeling time as lazy numbers

How can I fuse two maps over the same list?

The Genuine Sieve of Eratosthenes — algorithm used to generate prime numbers

Derivative Towers and how to use the vector-space package (haskell)

Slowdown when using parallel strategies in Haskell

How is this memoized DP table too slow for SPOJ?

Algorithm - How to delete duplicate elements in a list efficiently?

Determining if a given number is a prime in haskell

Standard Haskell function :: (a -> Maybe b) -> [a] -> Maybe b

Simple word count in haskell

How to edit nth element in a Haskell list?

Defining function signature in GHCi

Why does this Haskell code not terminate?

Unwrapping datatypes in Haskell without extraneous code

Screen capture in Haskell?

Haskell: What is the difference between (+1) and (\x->x+1)?

Partial Application with Infix Functions

Generate list of random values and also get a new generator

Fixed point combinator in Haskell

“Pattern matching” of algebraic type data constructors

Can GHC warn if class instance is a loop?

Tacit function composition in Haskell

How do I get the sums of the digits of a large number in Haskell?

Why does the pointfree version of this function look like this?

Can Haskell's Control.Concurrent.Async.mapConcurrently have a limit?

The “handle” function and Real World Haskell

zlib build error with GHC

MonadPlus definition for Haskell IO

What's the difference between a lens and a partial lens?

What does uncurry ($) do?

Haskell concurrency - is forkIO really nondeterministic?

Haskell: where clause referencing bound variables in lambda

Does an unused let binding have any effect in Haskell?

Can I disable the “non-exhaustive pattern matches” warning only for lambdas?

Haskell: Prefer pattern-matching or member access?

Flags in cabal files

Record types with multiple constructors in haskell

yesod - getting the request body for a POST “Content-type: application/json”

GHC version check in code

Select random element from a set, faster than linear time (Haskell)

How can I use Control.Lens to update the ith element of a list?

how to write a derivable class?

“=~” raise “No instance for (RegexContext Regex [Char] [String])”

Haskell - sortBy function

Overriding (==) in Haskell

Using alex/happy with Cabal

difference between isNothing and (== Nothing) in Haskell?

make function with 'if' point-free

Getting all the diagonals of a matrix in Haskell

Function composition in Haskell with tuple arguments

Guarded Equations in Haskell

Common programming mistakes for Haskell developers to avoid?

What is the type of return 5 in Haskell when no context is given?

How to make Haskell or ghci able to show Chinese characters and run Chinese characters named scripts?

Repacking monads — any generic way?

Creating functions over Enumerations

Can't install diagrams/arithmoi on Mac

Is this a safe use of unsafeCoerce?

Parser library that can handle ambiguity

cabal install … failing - osx - many unsatisfied packages

Is there an instance of Monad but not of MonadFix?

Which is the preferred method for writing “guards”?

Concise if-then-else notation in do-blocks in Haskell

What is the most efficient purely functional algorithm for generating all prefixes of a list?

Is there a way to get a Haskell setup on Windows without an installation? (Copy + paste)

hGetContents being too lazy

Why is Haskell monadic bind left-associative?

Data.ByteString.Lazy.Internal.ByteString to string?

Why is not GHC optimizing for constants?

C vs Haskell Collatz conjecture speed comparison

Haskell's Arrow-Class in Agda and -> in Agda

Haskell program aborts with “loop” but I think it shouldn't

Haskell, Aeson & JSON parsing into custom type

What are lifted and unlifted product types in Haskell?

Optimising Haskell data reading from file

Haskell space usage compile time restrictions

Haskell - List of instances of a Typeclass

How do I get consistent criterion benchmarks, or interpret results across runs?

How to implement the equivalent of Go's select statement for Haskell STM channels?

`cabal update` failed due to `out of memory`

How to convert between ByteString and Storable Vector?

Do guarded pipes behave the same as pipes using await?

Haskell “not a visible field of constructor” error

Is there a name for a function that takes a piece of data and a list of functions and applies each function to the result of the last one?

Catching/hijacking stdout in haskell

Does Data.ByteString.readFile block all threads?

Can I make haskell GADT data constructor infix in derived Show?

Does yesod uses the processor when idle?

Force pre-computation of a constant

How to run Haskell on OSX El Capitan

Can functional reactive programming (FRP) be expressed using monads?

How to apply data parallelim on haskell Fast Fourier Transformation?

In Parsec, is there a way to prevent lexeme from consuming newlines?

Haskell: “Not in scope: '>>'” with no implicit prelude

xmonad vertical resize tile/window

testing in functional programming

When is UndecidableInstances safe? Some general questions regarding the GHC extension

Normalized and immutable data model

How is FRP handled in terms of memory?

Remove border from fullscreen floating windows only (XMonad configuration)

How do I define a composite key in Persistent

Variadic compose function?

How to upgrade GHC with Stack

How to disambiguate selector function?

What is the connection between primitive recursion and catamorphisms?

Representing sum types in sql with Persistent, and Esqueleto joins

haskell - Average floating point error using QuickCheck

Combine two monads when neither has a transformer?

In Haskell, (+) is a function, ((+) 2) is a function, ((+) 2 3) is 5. What exactly is going on there?

Haskell: monadic takeWhile?

Ambiguous Occurrence

Returning a null value in Haskell without constricting Polymorphism

How do you find all of the subsequences of a list?

Funky haskell lazy list implicit recursion

Remove elements by index in haskell

How do I implement `cat` in Haskell?

Comparing functions in Haskell

How would you (re)implement iterate in Haskell?

Why discarded values are () instead of ⊥ in Haskell?

Haskell combinations and permutation

Read until end of stream in haskell

Counting unique elements in a list

How do I make my Haskell function as short as possible?

Is (>>) supposed to discard all left-side output?

What is a Combinator in Haskell

Calculate n-ary Cartesian Product

How to get system time in Haskell using Data.Time.Clock?

Pointer equality in Haskell?

Haskell Performing fst on a 3 part tuple

Futures in Haskell

How do I use a Haskell library function?

What is the best way to extract a diagonal from a matrix in Haskell?

Is there a better way to implement a multi-channel Writer monad in Haskell?

Poor haskell network performance

Haskell maps returning a monad

How do I convert DiffTime to NominalDiffTime?

Pretty print ByteString to hex nibble-wise

How do I use a let within a do block in ghci?

Using Overloaded Strings

Behavior in reactive-banana

RankNTypes and scope of `forall'

Haskell: duplicated functions (+) and (++), mappend

Writing an IO String to stdout in Haskell

How to use Control.Monad.State with Parsec?

haskell — ways to have a clean import block? (re-exporting modules? multiple imports per line?)

Whats the syntax for the coproduct (disjoint union) of types in Haskell?

When to expose constructors of a data type when designing data structures?

Simple progress indication in console

QuickCheck catch-22

Does Haskell support closed polymorphic types?

Haskell why does “Num x” require “Show x”?

How can I improve my understanding of the Haskell Type system?

Expressing long chain of compositions in Haskell

exceptions and monad transformers

Motivation for limitation on data kind promotion

Haskell - parse error on input `|'

Updating a Big State Fast in Haskell

How does 'get' actually /get/ the initial state in Haskell?

Is Haskell's type system isomorphic to an inconsistent logic system? If so, what are the consequences?

Ord comparing, but returns the smallest one

Is there a proof that runST is indeed pure?

Combining StateT IO with State

GHC 7.4 update breaks haskell98?

Adding Haskell's Monadic Bind Operator to Scala

How do command line tools change their output after outputting it?

Haskell - Declaring the type of multiple functions

Navigating and modifying ASTs built on the Free monad in Haskell

“Dependent optional” data in Haskell

Can I disable control-C?

Pattern match in binding of lambda?

Haskell exporting large number of functions

Making a custom datatype ord-able

When does GHC use sharing?

How does one release a *nix project?

How to make a type an instance of Eq

alternative to typeclasses?

Simple example for ImpredicativeTypes

What is C#'s equivalent to Haskell's newtype?

parsing utctime with aeson

Why does QuickCheck give up?

Understanding GHC error “Qualified name in binding position”

list of nested empty lists in Haskell

A Stricter Control.Monad.Trans.Writer.Strict

How can I implement a purely functional standard binary heap (ocaml or haskell)?

Functor / Applicative instances for State in Haskell

Grandfather Paradox in Haskell

Is there a bug in the minimum function?

Where does `stack build` store generated executables?

Dynamically loading compiled Haskell module - GHC 7.6

Kind vs Rank in type theory

Polymorphic Return Types Depending on Context

Emacs hangs in haskell-mode with inferior-haskell-load-file call

Is there a shortcut for this in Lens?

How can I use parMap with a monadic function?

Write a Maximum Monoid using Maybe in Haskell

Testing QuickCheck properties against multiple types?

In Haskell, how do you restrict functions to only one constructor of a data type?

Trees with values on the leaves only

How to get rid of $(…) and [| … |] syntax when using a Template Haskell function?

Combining fragments of Haskell Code to get the bigger picture

Recommended approach to use Stack as global package manager

How to get generic (polymorphic) lambda in scala?

Static Guarantee on Key/Value Relationships in Data.Map

How to construct an Applicative instance with constraints (similarly to constructing Monad instances using ContT)

Bifunctor vs. Arrow methods

Why does this function seem to hide its embedded exception?

Haskell: GHCi treats Ctrl-Y like Ctrl-Z

Haskell Multiple Contexts - currying?

Use StateT within Web.Scotty

How to define multiple type of comment block in Parsec

Idiomatic Vector Algebra in Haskell

Asymmetry in the bind function

Is it possible to change the step size of the built-in haskell range function or literal?

Swap two elements in a list by its indices

simple Haskell functions in point-free style

How to get variable name in haskell

How to get a program's running time in Haskell

Haskell too many where clauses, any alternate suggestions

How do I parse a matrix of integers in Haskell?

Function like catMaybes, but counting Nothing values

Zipping with padding in Haskell

Haskell: Can typeclasses define types (ala type traits)

Making a data type an instance of Show in Haskell

Haskell: Function application with $

Map applied to multiple arguments in Haskell

Extract values from a list of IO actions

Haskell get character array from string?

Can I avoid “rightward drift” in Haskell?

Is there a difference between floor and truncate in Haskell

Some questions about monads in Haskell

Why do We Need Sum Types?

Implement a function to count frequency of each element in a list

Examples of Haskell Applicative Transformers

How to define a rotates function

Type Constraints in Data Declaration Haskell

Why does the list functor represent a context of nondeterministic choice?

Checking if a string consists of balanced parenthesis

Why are Foldable and Functor separate classes?

How do I pad string representations of integers in Haskell?

Extent of GHC's optimization

Computing the mean of a list efficiently in Haskell

Test if all elements of a Foldable are the same

Is there a Haskell equivalent of Scala's Iterable.maxBy?

Haskell : can only load one file at a time via :load

Word splitting with regular expressions in Haskell

Haskell Print Lines in function

Pairing adjacent list items in Haskell

Writing the Identity monad in terms of Free

Rounding to specific number of digits in Haskell

Haskell: Inserting every line from a file into a list

Haskell: How to organize a group of functions that all take the same arguments

Haskell measuring function performance

Haskell: how to evaluate a String like “1+2”

Filter a list of paths to only include files

How to write without Do notation

How to “extend” classes in Haskell

How to filter a Maybe value

How to use the maybe monoid and combine values with a custom operation, easily?

How can I make sure main thread ends after all other threads ends?

lazy version of mapM

Is there an Iteratee-like concept which pulls data from multiple sources?

Why can't I write a general function to check if two lists are equal?

How can I get the position where error was called?

Read and writing to file in Haskell

Stack overflow when using Haskell sort function

Typeclass instance with functional dependencies doesn't work

Is there a way to implement constraints in Haskell's type classes?

Haskell: check if string is valid number

Simple questions about the scotty Haskell web framework

Haskell error Not in scope: data constructor

How do I break out of a pure loop in Haskell without hand-written recursion?

Making Data.Map a functor in Haskell

Non-lazy branch of GHC

QuickCheck exit status on failures, and cabal integration

easy “undo” in functional data structures

Understanding operations on composed functor types

Derivation of Free Monad

Why does “return Nothing” return Nothing?

Making numeric functions an instance of Num?

Haskell Range Map library

Executing a system command in Haskell

Call-by-name in Scala vs lazy evaluation in Haskell?

Mutual recursion in odd/even functions in haskell

Haskell: Why is there no type mismatch (and why does this compile)?

Understanding bind function in Haskell

Flowcharting functional programming languages

Haskell parsing tools - yacc:lex :: happy:?

What is the meaning of ~ before (l, r)

In Haskell is dependency injection using ExistentialQuantification an anti-pattern?

How do you supply a default value to a string option in Options.Applicative

Remove the first and the last element from a list in Haskell

How do I catch read exceptions in Haskell?

Systematically applying a function to all fields of a haskell record

Am I using randomRIO wrong?

How to “change” single values in large objects in elegant way?

Streaming recursive descent of a directory in Haskell

how to achieve “product of two monads” effect?

Why do non-exhaustive guards cause irrefutable pattern match to fail?

cabal install `gcc' failed in phase `C Compiler'

Haskell packages - dependency tree

Making Read-Only functions for a State in Haskell

When is explicit recursion necessary?

Haskell obscure file path operations (simplify away the dots)

Serialization of functions in Haskell

Haskell — get TypeRep from concrete type instance

Understanding forall in Monad '>>=' function?

Local infix operator definition in Haskell

Which dictionary does GHC choose when more than one is in scope?

How to inject the result of an IO action into a non-IO monadic computation

Efficiently turn a ByteString into a hex representation

Is it possible to define type with callable objects in Haskell?

Is there a reason we can't populate types with DataKinds?

What about arrows?

Running a subexpression once

How to convert a failed computation to a successful one and vice versa

Manipulating the monad stack

How to let a function [a] -> [a] operate on [(a,Int)]?

Haskell dynamically set record field based on field name string?

Underlying Parsec Monad

Forcing haskell-indent-mode over haskell-indentation-mode in haskell-mode 2.7?

ApplicativeDo language extension with `Parsing` applicative still looking for Monad instance

Learning Haskell - How to simplify expressions?

map runSTArray over a list of STArrays?

Java Swing GUI Not Displaying in Xmonad

ViewPatterns and multiple calls in Haskell

Sleeping until the start of the next minute

Haskell function that takes a variadic function as an argument (and returns something else than that func) without FlexibleInstances, pure Haskell2010

HUnit/QuickCheck with Continuous Integration

Haskell FFI Support for Functions With Variadic Arguments

Can ghc treat certain specified warnings as errors and others as warnings?

Show-ing functions used in QuickCheck properties

Is it common to use the same name for the data type and value constructor in Haskell?

Stack (Haskell) throws TlsException in Windows

Simple usage samples for haskell Data.HList

invisible / hidden field in the constructor

Managing state - chapter 3 of SICP

head and tail on difference lists in Haskell, à la LYAH

Parsing function in haskell

Haskell - manipulating/extending an ADT that isn’t under your control

How to convert a Haskell Traversable into a Vector?

Haskell collections with guaranteed worst-case bounds for every single operation?

Creating a new list that adds and sums elements from an old list

Evaluation and space leaks in Haskell

Feeding a monadic expression into unless or when

Why are there no “general” accessor functions for tuples in Haskell?

Sequencing IO actions in parallel

XMonad spawn programs on startup in specified workspace

Haskell Thread Communication Pattern Scenario

Best way to convert between [Char] and [Word8]?

GHC: Are there consistent rules for memoization for calls with fixed values?

Foldable vs Traversable

Why does GHC only warn on partial implemented classes, and not error?

Haskell-mode not working for my project, can't find module

What is legal Literate Haskell? Formal Syntax somewhere?

How to define a usable Applicative instance for a vector type enforcing length 2^n

Generically derive Arbitrary for massive algebraic data types?

Optimize a list function that creates too much garbage (not stack overflow)

plugins package unknown symbol when using cabal

Using persistent from within a Conduit

How to deal with application state in Gtk2Hs

Does Travis ci allow ghc versions larger than 7.8?

Link to a static file from Hamlet

How to package a haskell gtk2hs glade application on windows?

How to organize large amounts of state in Haskell projects

Using Template Haskell, how can I splice the same type into multiple locations?

Type Families with GHC.Generics or Data.Data

How to use the darcs library to query information about patches?

Explain Type Classes in Haskell

Does haskell have a conditional operator such as “x == y ? a : b” in C++ or ifelse(x==y, a, b) in R?

What do we call this (new?) higher-order function?

The meaning of ' in Haskell function name?

Read n lines into a [String]

Point-free style and using $

Haskell: Overlapping instances

What's your naming convention for helper functions?

Haskell: tail recursion version of depth of binary tree

What's similar to fmap for monadic values?

How do i convert String into list of integers in Haskell

Functor Design Pattern in Haskell

What is an idiomatic way to add lists in Haskell?

Detect bottom value in Haskell

Number of elements in Haskell in pointfree style

Running parallel URL downloads in Haskell

Difference between two functions creating a singleton list

Haskell: non-exhaustive-patterns

ADT-like polymorphism in Java (without altering class)

Concurrent DB connection pool in Haskell

Computational cost of applicative style

Linking/Combining Type Classes in Haskell

Haskell: Show screwed up?

Pattern-Matching mixed with guards

Keeping State in a Purely Functional Language

foldl / foldr query

iterating through a list in haskell

is there union and intersect Haskell Prelude implementation?

Haskell - efficient equivalent of for loop?

Translate a Scala Type example to Haskell

Filtering Nothing and unpack Just

Order of execution within monads

Checking to see if a list is ordered consecutively

Infinite list of infinite counters

Filtering list of tuples

With monads, can join be defined in terms of bind?

Haskell: Why aren't infix type constructors allowed?

Idiomatic way to write firstRightOrLefts in Haskell?

Overlapping instances in Haskell

How do I deal with infix symbols looking ugly with qualified names

Is there a function in Haskell that returns the type of its argument (or a string showing the type)?

Filtering composite structures with Lens

Why can I omit the constructor when referring to newtype wrapped number types?

How does Haskell actually define the + function?

Couldn't match expected type `a' with actual type `[a]'

Haskell: Map function onto a list of lists

Converting number base

What is a simple way to wait for and then detect keypresses in Haskell?

Reasoning about performance in Haskell

Chaining methods left to right in Haskell (as opposed to right to left)

Int32 to Int in Haskell

How can I execute IO commands repeatedly in Haskell?

Why doesn't `-` (minus) work for operator sections?

Useful instantiations of “fix” on non-function types?

How to parse a decimal fraction into Rational in Haskell?

Why can't I stack two readers ontop of eachother?

How do I give a Functor instance to a datatype built for general recursion schemes?

How do I model inheritance in Haskell?

Haskell: Monitor a file without polling (à la inotify in linux)

Faster alternatives to hFileSize to retrieve the size of a file in Haskell?

How does Traversable use the fact that it subclasses both Foldable and Functor?

Is there a “chain” monad function in Haskell?

What indentation is required for a case statement within a let statement?

Iterate over all pair combinations without repetition in Haskell

Haskell's Monad vs. APL's Monad

Flexible instances needed?

Compiler switch to turn debugging messages on/off?

Defining recursive data types with tuples in Haskell

How do I use cabal's MIN_VERSION_ and other macros with ghci?

Cabal output is redirected but not generated

How to determine the directory in which a running Haskell script or application lives?

stack ghc error "Invalid Option `--make`

How do I “continue” in a `Monad` loop?

How to parse an array with Haskell Aeson

Observing lazyness in Haskell

units for rings in haskell in Num or Rational

combining maybe and seq monads: confused at the output

“read”-ing string data into haskell “data” types

Is it better to use guards than patterns for recursion functions in Haskell?

Haskell's “deriving Show” in F#?

How does this let expression work?

How can I encode and enforce legal FSM state transitions with a type system?

In Haskell, how to derive such a custom class automatically?

haskell - flip fix / fix

How to fork inside monad transformer

How can I use a fixed-minimum-length list in a total and elegant way?

include extensions in haskell-stack conf file

where clauses in list comprehensions

Downsides to ScopedTypeVariables

Transform a GADT without constraints to another GADT with constraints when such constraints hold

Is there a way in Haskell to query thread state using ThreadID after a forkIO?

Haskell equivalent of Boost.Fusion

Haskell real-time update and lookup performance

Haskell repa — mapping with indices

Specifying class constraints in value constructors

Haskell: Could not find module `Data.List.Split'

“* Missing C library: GL” when installing gloss (specifically the OpenGLRaw dependency) on Ubuntu

Is there an alternative to records in Haskell?

How to properly generate a random bytestring in haskell

Differentiate between String and [Char]

What does :-> mean in a haskell type specification

multiplication of different types in Haskell

verboseCheck in QuickCheck 2?

In Haskell, is it possible to provide default implementation for partially applied multi-param type class?

Reverse range implementation

Haskell 'count occurrences' function

haskell type signature for integers

How do I set default values in a record

How to fill up a Data.Map in a space&time efficient way

Lenses and Monomorphism Restriction

“InternalIOException getAddrInfo: does not exist (error 10093)” on Windows 8

Yesod ExitFailure 1 when installing scaffolded app

How can I get rid of `let` in Core?

Deriving instances with TypeFamilies

Haskell style memoization in Java

How would you write this Clojure snippet in Ruby and/or Haskell?

Haskell - why would I use infinite data structures?

good way to convert between ad-hoc polymorphic functions and parametric polymorphic ones

Restrictions of unboxed types

How can packages be unhidden when using only stack?

Implicit parameter and function

Parsing large log files in Haskell

What should a Traversable instance look like for a Tree datatype with a nested Maybe value?

May I limit memory usage per function/monad/thread in Haskell?

Is it possible to derive recursion principles generically?

Change fixity of function type (->)?

AllowAmbiguousTypes and propositional equality: what's going on here?

Parse JSON with fieldnames that contain reserved keywords

Fibonacci numbers without using zipWith

Clarification on Existential Types in Haskell

How can I use contradictory evidence?

have ghci list all possible type class instances?

How to implement early exit / return in Haskell?

Mixing Monads in Haskell

Why am I getting “Non-exhaustive patterns in function…” when I invoke my Haskell substring function?

How to input an integer in haskell? (input in console)

Accumulator in foldr

Haskell: can't understand the bottleneck

What is <|> in haskell?

Using TChan with Timeout

Can this be done with STM?

Put result of code right below the code in resulting PDF. Haskell

Optimizing Haskell Inner Loops

Is there a standard name (and library implementation) for a Monad that hides computation behind a constructor?

Haskell Warp/Wai and HTTPS — how to make them work?

Can I have a polymorphic function argument that may not need to be supplied for some types?

Thread blocked indefinitely in an MVar operation

Why are these functions differently evaluated

Representing map constraints as a ADT

Error when running cabal-install: ExitFailure 1 (Mac OS X lion)

Moving a compiled Haskell program

How to define an arbitrary arity function in Haskell, which includes an arity of 0?

Cannot 'coerce' data type with 'Reader' as a field

Can two different typeclasses have the same method names?

How much does Haskell/GHC memoize?

QuickCheck 2 batch processing

Parsec and Applicative style

How to “unpack” a structure in haskell

Meaning and usage of complex number functor and monad?

Freeing memory allocated with newCString

Does Writer Monad guarantee right associative concatenation?

how to use hoogle locally (like ctags)?

How can I express foldr in terms of foldMap for type-aligned sequences?

What is the most general way to compute the depth of a tree with something like a fold?

How to get the declaration of a function using `reify`?

Simulating a spring/damper system in Yampa

How to create data for Criterion benchmarks?

How is the ghc runtime support for profiling implemented?

Haskell: How to make foldr/build fusion happen in (zip [0..])?

Writer implemented with Operational Monad does not work lazily

Programmatically check if executable exists without running it or using `which`

Is there an “ApplicativeIO” class?

Resolving overlapping instances in external library

Is there a template haskell function for quoting?

What is the right way to render Cairo updates in Gtk2hs?

What is the up-to-date standard workflow for building Haskell projects?

How do Haskell compilers implement the parse-error(t) rule in practice?

FRP frameworks and IO

Why does my Mapreduce implementation (real world haskell) using iteratee IO also fails with “Too many open files”

Why is this Yampa ball-bouncing going into an endless loop?

How do you do generic programming in Haskell?

Haskell - List Comprehension Predicates Optimization

Implementing the last function

Double every other element of list from right in Haskell

loop through two variable in Haskell

Convert list of Integers into one Int (like concat) in haskell

How to mix binding (<-) and assignment (let) in one line? (in Haskell)

Kernighan & Ritchie word count example program in a functional language

import qualified in GHCI

Fastest immutable list data structure for lots of concatenation and a single iteration

Haskell Print while in recursion?

<*> for lists implemented as do notation - isn't this “cheating”?

What is wrong with this simple type definition? (Expecting one more argument to…)

Haskell - Debug Print in if block

Multiply two lists element by element in Haskell

Haskell: How to write a `Monoid` instance for something that depends on parameters

How to handle expressions in Haskell?

What does the double-backslash \\ mean in Haskell?

How to define a class that allows uniform access to different records in Haskell?

Is it possible to write pattern-matched functions in pointfree form?

Why can't a Num be compared to 0?

Why are difference lists not an instance of foldable?

Haskell-style sections in Common Lisp

Can Haskell's monads be thought of as using and returning a hidden state parameter?

How to handle side effect with Applicative?

Pattern matching equivalent variables in Haskell, like in Prolog

When should I use $ (and can it always be replaced with parentheses)?

non-lawful Monoid instances for building up AST not considered harmful?

Haskell basic factorial not exiting?

Can I create a function at runtime by evaluating a string?

how could I take advantage of both State and Writer in haskell?

Simplify Maybe expressions

How does Haskell do pattern matching without us defining an Eq on our data types?

Improve my Haskell implementation of Filter

How to have an operator which adds/subtracts both absolute and relative values, in Haskell

Haskell Space Overflow

Haskell Cons Operator (:)

Lists of fixed length and type literals

Haskell QuickCheck minimal counter example

Generate a random string at compile time or run time and use it in the rest of the program

escape code \“ prints both \”. Anyway to put a " in to a string.?

Haskell Polyvariadic Function With IO

Why don't the Data.Text examples work for me?

Does haskell's foldr always take a two-parameter lambda?

Stop threads from interleaving output

Pattern matching a regex pattern in Haskell

Comparing list length

How to return a polymorphic type in Haskell based on the results of string parsing?

f1 = flip const map. How does this function work?

Are arithmetic patterns legal Haskell?

Haskell n-ary tree traversal

How does this constitute a Haskell rigid type error?

Haskell tail function for empty lists

Function to output function name

Generating a 2D grid in Haskell

What do 'let' and 'in' mean in Haskell?

Function definition by special cases in GHCi

How to limit a Int field to a range of values?

Why is this Haskell expression so slow?

Escaping from the IO monad inside the Continuation monad

Equivalent to map (from haskell) in Java 7

imperative loop in Haskell

How can I declare the type of a function defined within a let

How would I write cycle as a lambda function?

Haskell monad: IO [Double] to [IO Double]

How can I write a lens for a sum type

Haskell - My own zip3 function

Not in scope: `catch'

Making a single function work on lists, ByteStrings and Texts (and perhaps other similar representations)

How do i use Debug.Trace.trace in the state monad?

Type Constraints : Can they be inferred from the datatype of a function's arguments?

Church Numerals in haskell

No instance for (Floating Int)

Is this an accurate example of a Haskell Pullback?

Is it possible to partially apply nth parameter in Haskell?

Haskell function returning existential type

Are Ord and Enum sometimes incompatible in Haskell?

Ensuring files are closed promptly

Setting argv[0] in Haskell?

When sharing an IORef, is it safe to read with readIORef as long as I'm writing with atomicModifyIORef?

Waiting on two inputs in Haskell, simultaneously

Count number of Instances of Char in a given String Haskell

Parse Array in nested JSON with Aeson

Haskell: Is there a safe/total version of (!!)?

Is there an append operator for ByteString?

minimum height in tree

Can a Haskell/GHC self-report its GC stats live?

installing text-icu on Mac OSX with cabal

Function as an Instance of Monad

Reading input from a system command in Haskell

Transforming expression given in prefix notation, identifying common subexpressions and dependencies

The missing folds

Why does this not run in constant memory?

Is there a way to `read` lazily?

Haskell for Lambda Calculus, Type Inferencing

How to use Parallel Strategies in Haskell

Haskell: How to use forkIO to enable multiple clients to connect to a server?

haskell — how to create a binary from a non-Main module?

Pattern matching of nested list in Haskell

How to produce a local datetime string in Haskell?

Parsing ASCII file efficiently in Haskell

Standard placement of type declarations

How to use different ghc builds with stack?

Does a function in Haskell always evaluate its return value?

Resolving ambiguous instance for multiparam type class

How do you find all of the subsequences of a list?

Funky haskell lazy list implicit recursion

Remove elements by index in haskell

How do I implement `cat` in Haskell?

Comparing functions in Haskell

How would you (re)implement iterate in Haskell?

Why discarded values are () instead of ⊥ in Haskell?

Haskell combinations and permutation

Read until end of stream in haskell

Counting unique elements in a list

How do I make my Haskell function as short as possible?

Is (>>) supposed to discard all left-side output?

What is a Combinator in Haskell

Calculate n-ary Cartesian Product

How to get system time in Haskell using Data.Time.Clock?

Pointer equality in Haskell?

Haskell Performing fst on a 3 part tuple

Futures in Haskell

How do I use a Haskell library function?

What is the best way to extract a diagonal from a matrix in Haskell?

Is there a better way to implement a multi-channel Writer monad in Haskell?

Poor haskell network performance

Haskell maps returning a monad

How do I convert DiffTime to NominalDiffTime?

Pretty print ByteString to hex nibble-wise

How do I use a let within a do block in ghci?

Using Overloaded Strings

Behavior in reactive-banana

RankNTypes and scope of `forall'

Haskell: duplicated functions (+) and (++), mappend

Writing an IO String to stdout in Haskell

How to use Control.Monad.State with Parsec?

haskell — ways to have a clean import block? (re-exporting modules? multiple imports per line?)

Whats the syntax for the coproduct (disjoint union) of types in Haskell?

When to expose constructors of a data type when designing data structures?

Simple progress indication in console

QuickCheck catch-22

Does Haskell support closed polymorphic types?

Haskell why does “Num x” require “Show x”?

How can I improve my understanding of the Haskell Type system?

Expressing long chain of compositions in Haskell

exceptions and monad transformers

Motivation for limitation on data kind promotion

Haskell - parse error on input `|'

Updating a Big State Fast in Haskell

How does 'get' actually /get/ the initial state in Haskell?

Is Haskell's type system isomorphic to an inconsistent logic system? If so, what are the consequences?

Ord comparing, but returns the smallest one

Is there a proof that runST is indeed pure?

Combining StateT IO with State

GHC 7.4 update breaks haskell98?

Adding Haskell's Monadic Bind Operator to Scala

How do command line tools change their output after outputting it?

Haskell - Declaring the type of multiple functions

Navigating and modifying ASTs built on the Free monad in Haskell

“Dependent optional” data in Haskell

Can I disable control-C?

Pattern match in binding of lambda?

Haskell exporting large number of functions

Making a custom datatype ord-able

When does GHC use sharing?

How does one release a *nix project?

How to make a type an instance of Eq

alternative to typeclasses?

Simple example for ImpredicativeTypes

What is C#'s equivalent to Haskell's newtype?

parsing utctime with aeson

Why does QuickCheck give up?

Understanding GHC error “Qualified name in binding position”

list of nested empty lists in Haskell

A Stricter Control.Monad.Trans.Writer.Strict

How can I implement a purely functional standard binary heap (ocaml or haskell)?

Functor / Applicative instances for State in Haskell

Grandfather Paradox in Haskell

Is there a bug in the minimum function?

Where does `stack build` store generated executables?

Dynamically loading compiled Haskell module - GHC 7.6

Kind vs Rank in type theory

Polymorphic Return Types Depending on Context

Emacs hangs in haskell-mode with inferior-haskell-load-file call

Is there a shortcut for this in Lens?

How can I use parMap with a monadic function?

Write a Maximum Monoid using Maybe in Haskell

Testing QuickCheck properties against multiple types?

In Haskell, how do you restrict functions to only one constructor of a data type?

Trees with values on the leaves only

How to get rid of $(…) and [| … |] syntax when using a Template Haskell function?

Combining fragments of Haskell Code to get the bigger picture

Recommended approach to use Stack as global package manager

How to get generic (polymorphic) lambda in scala?

Static Guarantee on Key/Value Relationships in Data.Map

How to construct an Applicative instance with constraints (similarly to constructing Monad instances using ContT)

Bifunctor vs. Arrow methods

Why does this function seem to hide its embedded exception?

Haskell: GHCi treats Ctrl-Y like Ctrl-Z

Haskell Multiple Contexts - currying?

Use StateT within Web.Scotty

How to define multiple type of comment block in Parsec

Idiomatic Vector Algebra in Haskell

Asymmetry in the bind function

Is it possible to change the step size of the built-in haskell range function or literal?

Swap two elements in a list by its indices

simple Haskell functions in point-free style

How to get variable name in haskell

How to get a program's running time in Haskell

Haskell too many where clauses, any alternate suggestions

How do I parse a matrix of integers in Haskell?

Function like catMaybes, but counting Nothing values

Zipping with padding in Haskell

Haskell: Can typeclasses define types (ala type traits)

Making a data type an instance of Show in Haskell

Haskell: Function application with $

Map applied to multiple arguments in Haskell

Extract values from a list of IO actions

Haskell get character array from string?

Can I avoid “rightward drift” in Haskell?

Is there a difference between floor and truncate in Haskell

Some questions about monads in Haskell

Why do We Need Sum Types?

Implement a function to count frequency of each element in a list

Examples of Haskell Applicative Transformers

How to define a rotates function

Type Constraints in Data Declaration Haskell

Why does the list functor represent a context of nondeterministic choice?

Checking if a string consists of balanced parenthesis

Why are Foldable and Functor separate classes?

How do I pad string representations of integers in Haskell?

Extent of GHC's optimization

Computing the mean of a list efficiently in Haskell

Test if all elements of a Foldable are the same

Is there a Haskell equivalent of Scala's Iterable.maxBy?

Haskell : can only load one file at a time via :load

Word splitting with regular expressions in Haskell

Haskell Print Lines in function

Pairing adjacent list items in Haskell

Writing the Identity monad in terms of Free

Rounding to specific number of digits in Haskell

Haskell: Inserting every line from a file into a list

Haskell: How to organize a group of functions that all take the same arguments

Haskell measuring function performance

Haskell: how to evaluate a String like “1+2”

Filter a list of paths to only include files

How to write without Do notation

How to “extend” classes in Haskell

How to filter a Maybe value

How to use the maybe monoid and combine values with a custom operation, easily?

How can I make sure main thread ends after all other threads ends?

lazy version of mapM

Is there an Iteratee-like concept which pulls data from multiple sources?

Why can't I write a general function to check if two lists are equal?

How can I get the position where error was called?

Read and writing to file in Haskell

Stack overflow when using Haskell sort function

Typeclass instance with functional dependencies doesn't work

Is there a way to implement constraints in Haskell's type classes?

Haskell: check if string is valid number

Simple questions about the scotty Haskell web framework

Haskell error Not in scope: data constructor

How do I break out of a pure loop in Haskell without hand-written recursion?

Making Data.Map a functor in Haskell

Non-lazy branch of GHC

QuickCheck exit status on failures, and cabal integration

easy “undo” in functional data structures

Understanding operations on composed functor types

Derivation of Free Monad

Why does “return Nothing” return Nothing?

Making numeric functions an instance of Num?

Haskell Range Map library

Executing a system command in Haskell

Call-by-name in Scala vs lazy evaluation in Haskell?

Mutual recursion in odd/even functions in haskell

Haskell: Why is there no type mismatch (and why does this compile)?

Understanding bind function in Haskell

Flowcharting functional programming languages

Haskell parsing tools - yacc:lex :: happy:?

What is the meaning of ~ before (l, r)

In Haskell is dependency injection using ExistentialQuantification an anti-pattern?

How do you supply a default value to a string option in Options.Applicative

Remove the first and the last element from a list in Haskell

How do I catch read exceptions in Haskell?

Systematically applying a function to all fields of a haskell record

Am I using randomRIO wrong?

How to “change” single values in large objects in elegant way?

Streaming recursive descent of a directory in Haskell

how to achieve “product of two monads” effect?

Why do non-exhaustive guards cause irrefutable pattern match to fail?

cabal install `gcc' failed in phase `C Compiler'

Haskell packages - dependency tree

Making Read-Only functions for a State in Haskell

When is explicit recursion necessary?

Haskell obscure file path operations (simplify away the dots)

Serialization of functions in Haskell

Haskell — get TypeRep from concrete type instance

Understanding forall in Monad '>>=' function?

Local infix operator definition in Haskell

Which dictionary does GHC choose when more than one is in scope?

How to inject the result of an IO action into a non-IO monadic computation

Efficiently turn a ByteString into a hex representation

Is it possible to define type with callable objects in Haskell?

Is there a reason we can't populate types with DataKinds?

What about arrows?

Running a subexpression once

How to convert a failed computation to a successful one and vice versa

Manipulating the monad stack

How to let a function [a] -> [a] operate on [(a,Int)]?

Haskell dynamically set record field based on field name string?

Underlying Parsec Monad

Forcing haskell-indent-mode over haskell-indentation-mode in haskell-mode 2.7?

ApplicativeDo language extension with `Parsing` applicative still looking for Monad instance

Learning Haskell - How to simplify expressions?

map runSTArray over a list of STArrays?

Java Swing GUI Not Displaying in Xmonad

ViewPatterns and multiple calls in Haskell

Sleeping until the start of the next minute

Haskell function that takes a variadic function as an argument (and returns something else than that func) without FlexibleInstances, pure Haskell2010

HUnit/QuickCheck with Continuous Integration

Haskell FFI Support for Functions With Variadic Arguments

Can ghc treat certain specified warnings as errors and others as warnings?

Show-ing functions used in QuickCheck properties

Is it common to use the same name for the data type and value constructor in Haskell?

Stack (Haskell) throws TlsException in Windows

Simple usage samples for haskell Data.HList

invisible / hidden field in the constructor

Managing state - chapter 3 of SICP

head and tail on difference lists in Haskell, à la LYAH

Parsing function in haskell

Haskell - manipulating/extending an ADT that isn’t under your control

How to convert a Haskell Traversable into a Vector?

Haskell collections with guaranteed worst-case bounds for every single operation?

Creating a new list that adds and sums elements from an old list

Evaluation and space leaks in Haskell

Feeding a monadic expression into unless or when

Why are there no “general” accessor functions for tuples in Haskell?

Sequencing IO actions in parallel

XMonad spawn programs on startup in specified workspace

Haskell Thread Communication Pattern Scenario

Best way to convert between [Char] and [Word8]?

GHC: Are there consistent rules for memoization for calls with fixed values?

Foldable vs Traversable

Why does GHC only warn on partial implemented classes, and not error?

Haskell-mode not working for my project, can't find module

What is legal Literate Haskell? Formal Syntax somewhere?

How to define a usable Applicative instance for a vector type enforcing length 2^n

Generically derive Arbitrary for massive algebraic data types?

Optimize a list function that creates too much garbage (not stack overflow)

plugins package unknown symbol when using cabal

Using persistent from within a Conduit

How to deal with application state in Gtk2Hs

Does Travis ci allow ghc versions larger than 7.8?

Link to a static file from Hamlet

How to package a haskell gtk2hs glade application on windows?

How to organize large amounts of state in Haskell projects

Using Template Haskell, how can I splice the same type into multiple locations?

Type Families with GHC.Generics or Data.Data

How to use the darcs library to query information about patches?

Explain Type Classes in Haskell

Does haskell have a conditional operator such as “x == y ? a : b” in C++ or ifelse(x==y, a, b) in R?

What do we call this (new?) higher-order function?

The meaning of ' in Haskell function name?

Read n lines into a [String]

Point-free style and using $

Haskell: Overlapping instances

What's your naming convention for helper functions?

Haskell: tail recursion version of depth of binary tree

What's similar to fmap for monadic values?

How do i convert String into list of integers in Haskell

Functor Design Pattern in Haskell

What is an idiomatic way to add lists in Haskell?

Detect bottom value in Haskell

Number of elements in Haskell in pointfree style

Running parallel URL downloads in Haskell

Difference between two functions creating a singleton list

Haskell: non-exhaustive-patterns

ADT-like polymorphism in Java (without altering class)

Concurrent DB connection pool in Haskell

Computational cost of applicative style

Linking/Combining Type Classes in Haskell

Haskell: Show screwed up?

Pattern-Matching mixed with guards

Keeping State in a Purely Functional Language

foldl / foldr query

iterating through a list in haskell

is there union and intersect Haskell Prelude implementation?

Haskell - efficient equivalent of for loop?

Translate a Scala Type example to Haskell

Filtering Nothing and unpack Just

Order of execution within monads

Checking to see if a list is ordered consecutively

Infinite list of infinite counters

Filtering list of tuples

With monads, can join be defined in terms of bind?

Haskell: Why aren't infix type constructors allowed?

Idiomatic way to write firstRightOrLefts in Haskell?

Overlapping instances in Haskell

How do I deal with infix symbols looking ugly with qualified names

Is there a function in Haskell that returns the type of its argument (or a string showing the type)?

Filtering composite structures with Lens

Why can I omit the constructor when referring to newtype wrapped number types?

How does Haskell actually define the + function?

Couldn't match expected type `a' with actual type `[a]'

Haskell: Map function onto a list of lists

Converting number base

What is a simple way to wait for and then detect keypresses in Haskell?

Reasoning about performance in Haskell

Chaining methods left to right in Haskell (as opposed to right to left)

Int32 to Int in Haskell

How can I execute IO commands repeatedly in Haskell?

Why doesn't `-` (minus) work for operator sections?

Useful instantiations of “fix” on non-function types?

How to parse a decimal fraction into Rational in Haskell?

Why can't I stack two readers ontop of eachother?

How do I give a Functor instance to a datatype built for general recursion schemes?

How do I model inheritance in Haskell?

Haskell: Monitor a file without polling (à la inotify in linux)

Faster alternatives to hFileSize to retrieve the size of a file in Haskell?

How does Traversable use the fact that it subclasses both Foldable and Functor?

Is there a “chain” monad function in Haskell?

What indentation is required for a case statement within a let statement?

Iterate over all pair combinations without repetition in Haskell

Haskell's Monad vs. APL's Monad

Flexible instances needed?

Compiler switch to turn debugging messages on/off?

Defining recursive data types with tuples in Haskell

How do I use cabal's MIN_VERSION_ and other macros with ghci?

Cabal output is redirected but not generated

How to determine the directory in which a running Haskell script or application lives?

stack ghc error "Invalid Option `--make`

How do I “continue” in a `Monad` loop?

How to parse an array with Haskell Aeson

Observing lazyness in Haskell

units for rings in haskell in Num or Rational

combining maybe and seq monads: confused at the output

“read”-ing string data into haskell “data” types

Is it better to use guards than patterns for recursion functions in Haskell?

Haskell's “deriving Show” in F#?

How does this let expression work?

How can I encode and enforce legal FSM state transitions with a type system?

In Haskell, how to derive such a custom class automatically?

haskell - flip fix / fix

How to fork inside monad transformer

How can I use a fixed-minimum-length list in a total and elegant way?

include extensions in haskell-stack conf file

where clauses in list comprehensions

Downsides to ScopedTypeVariables

Transform a GADT without constraints to another GADT with constraints when such constraints hold

Is there a way in Haskell to query thread state using ThreadID after a forkIO?

Haskell equivalent of Boost.Fusion

Haskell real-time update and lookup performance

Haskell repa — mapping with indices

Specifying class constraints in value constructors

Haskell: Could not find module `Data.List.Split'

“* Missing C library: GL” when installing gloss (specifically the OpenGLRaw dependency) on Ubuntu

Is there an alternative to records in Haskell?

How to properly generate a random bytestring in haskell

Differentiate between String and [Char]

What does :-> mean in a haskell type specification

multiplication of different types in Haskell

verboseCheck in QuickCheck 2?

In Haskell, is it possible to provide default implementation for partially applied multi-param type class?

Reverse range implementation

Haskell 'count occurrences' function

haskell type signature for integers

How do I set default values in a record

How to fill up a Data.Map in a space&time efficient way

Lenses and Monomorphism Restriction

“InternalIOException getAddrInfo: does not exist (error 10093)” on Windows 8

Yesod ExitFailure 1 when installing scaffolded app

How can I get rid of `let` in Core?

Deriving instances with TypeFamilies

Haskell style memoization in Java

How would you write this Clojure snippet in Ruby and/or Haskell?

Haskell - why would I use infinite data structures?

good way to convert between ad-hoc polymorphic functions and parametric polymorphic ones

Restrictions of unboxed types

How can packages be unhidden when using only stack?

Implicit parameter and function

Parsing large log files in Haskell

What should a Traversable instance look like for a Tree datatype with a nested Maybe value?

May I limit memory usage per function/monad/thread in Haskell?

Is it possible to derive recursion principles generically?

Change fixity of function type (->)?

AllowAmbiguousTypes and propositional equality: what's going on here?

Parse JSON with fieldnames that contain reserved keywords

Fibonacci numbers without using zipWith

Clarification on Existential Types in Haskell

How can I use contradictory evidence?

have ghci list all possible type class instances?

How to implement early exit / return in Haskell?

Mixing Monads in Haskell

Why am I getting “Non-exhaustive patterns in function…” when I invoke my Haskell substring function?

How to input an integer in haskell? (input in console)

Accumulator in foldr

Haskell: can't understand the bottleneck

What is <|> in haskell?

Using TChan with Timeout

Can this be done with STM?

Put result of code right below the code in resulting PDF. Haskell

Optimizing Haskell Inner Loops

Is there a standard name (and library implementation) for a Monad that hides computation behind a constructor?

Haskell Warp/Wai and HTTPS — how to make them work?

Can I have a polymorphic function argument that may not need to be supplied for some types?

Thread blocked indefinitely in an MVar operation

Why are these functions differently evaluated

Representing map constraints as a ADT

Error when running cabal-install: ExitFailure 1 (Mac OS X lion)

Moving a compiled Haskell program

How to define an arbitrary arity function in Haskell, which includes an arity of 0?

Cannot 'coerce' data type with 'Reader' as a field

Can two different typeclasses have the same method names?

How much does Haskell/GHC memoize?

QuickCheck 2 batch processing

Parsec and Applicative style

How to “unpack” a structure in haskell

Meaning and usage of complex number functor and monad?

Freeing memory allocated with newCString

Does Writer Monad guarantee right associative concatenation?

how to use hoogle locally (like ctags)?

How can I express foldr in terms of foldMap for type-aligned sequences?

What is the most general way to compute the depth of a tree with something like a fold?

How to get the declaration of a function using `reify`?

Simulating a spring/damper system in Yampa

How to create data for Criterion benchmarks?

How is the ghc runtime support for profiling implemented?

Haskell: How to make foldr/build fusion happen in (zip [0..])?

Writer implemented with Operational Monad does not work lazily

Programmatically check if executable exists without running it or using `which`

Is there an “ApplicativeIO” class?

Resolving overlapping instances in external library

Is there a template haskell function for quoting?

What is the right way to render Cairo updates in Gtk2hs?

What is the up-to-date standard workflow for building Haskell projects?

How do Haskell compilers implement the parse-error(t) rule in practice?

FRP frameworks and IO

Why does my Mapreduce implementation (real world haskell) using iteratee IO also fails with “Too many open files”

Why is this Yampa ball-bouncing going into an endless loop?

How do you do generic programming in Haskell?

Haskell - List Comprehension Predicates Optimization

Implementing the last function

Double every other element of list from right in Haskell

loop through two variable in Haskell

Convert list of Integers into one Int (like concat) in haskell

How to mix binding (<-) and assignment (let) in one line? (in Haskell)

Kernighan & Ritchie word count example program in a functional language

import qualified in GHCI

Fastest immutable list data structure for lots of concatenation and a single iteration

Haskell Print while in recursion?

<*> for lists implemented as do notation - isn't this “cheating”?

What is wrong with this simple type definition? (Expecting one more argument to…)

Haskell - Debug Print in if block

Multiply two lists element by element in Haskell

Haskell: How to write a `Monoid` instance for something that depends on parameters

How to handle expressions in Haskell?

What does the double-backslash \\ mean in Haskell?

How to define a class that allows uniform access to different records in Haskell?

Is it possible to write pattern-matched functions in pointfree form?

Why can't a Num be compared to 0?

Why are difference lists not an instance of foldable?

Haskell-style sections in Common Lisp

Can Haskell's monads be thought of as using and returning a hidden state parameter?

How to handle side effect with Applicative?

Pattern matching equivalent variables in Haskell, like in Prolog

When should I use $ (and can it always be replaced with parentheses)?

non-lawful Monoid instances for building up AST not considered harmful?

Haskell basic factorial not exiting?

Can I create a function at runtime by evaluating a string?

how could I take advantage of both State and Writer in haskell?

Simplify Maybe expressions

How does Haskell do pattern matching without us defining an Eq on our data types?

Improve my Haskell implementation of Filter

How to have an operator which adds/subtracts both absolute and relative values, in Haskell

Haskell Space Overflow

Haskell Cons Operator (:)

Lists of fixed length and type literals

Haskell QuickCheck minimal counter example

Generate a random string at compile time or run time and use it in the rest of the program

escape code \“ prints both \”. Anyway to put a " in to a string.?

Haskell Polyvariadic Function With IO

Why don't the Data.Text examples work for me?

Does haskell's foldr always take a two-parameter lambda?

Stop threads from interleaving output

Pattern matching a regex pattern in Haskell

Comparing list length

How to return a polymorphic type in Haskell based on the results of string parsing?

f1 = flip const map. How does this function work?

Are arithmetic patterns legal Haskell?

Haskell n-ary tree traversal

How does this constitute a Haskell rigid type error?

Haskell tail function for empty lists

Function to output function name

Generating a 2D grid in Haskell

What do 'let' and 'in' mean in Haskell?

Function definition by special cases in GHCi

How to limit a Int field to a range of values?

Why is this Haskell expression so slow?

Escaping from the IO monad inside the Continuation monad

Equivalent to map (from haskell) in Java 7

imperative loop in Haskell

How can I declare the type of a function defined within a let

How would I write cycle as a lambda function?

Haskell monad: IO [Double] to [IO Double]

How can I write a lens for a sum type

Haskell - My own zip3 function

Not in scope: `catch'

Making a single function work on lists, ByteStrings and Texts (and perhaps other similar representations)

How do i use Debug.Trace.trace in the state monad?

Type Constraints : Can they be inferred from the datatype of a function's arguments?

Church Numerals in haskell

No instance for (Floating Int)

Is this an accurate example of a Haskell Pullback?

Is it possible to partially apply nth parameter in Haskell?

Haskell function returning existential type

Are Ord and Enum sometimes incompatible in Haskell?

Ensuring files are closed promptly

Setting argv[0] in Haskell?

When sharing an IORef, is it safe to read with readIORef as long as I'm writing with atomicModifyIORef?

Waiting on two inputs in Haskell, simultaneously

Count number of Instances of Char in a given String Haskell

Parse Array in nested JSON with Aeson

Haskell: Is there a safe/total version of (!!)?

Is there an append operator for ByteString?

minimum height in tree

Can a Haskell/GHC self-report its GC stats live?

installing text-icu on Mac OSX with cabal

Function as an Instance of Monad

Reading input from a system command in Haskell

Transforming expression given in prefix notation, identifying common subexpressions and dependencies

The missing folds

Why does this not run in constant memory?

Is there a way to `read` lazily?

Haskell for Lambda Calculus, Type Inferencing

How to use Parallel Strategies in Haskell

Haskell: How to use forkIO to enable multiple clients to connect to a server?

haskell — how to create a binary from a non-Main module?

Pattern matching of nested list in Haskell

How to produce a local datetime string in Haskell?

Parsing ASCII file efficiently in Haskell

Standard placement of type declarations

How to use different ghc builds with stack?

Does a function in Haskell always evaluate its return value?

Resolving ambiguous instance for multiparam type class