js substring
snippet in javascript

substr() javascript

user2257

const str = 'substr';

console.log(str.substr(1, 2)); // (1, 2): ub
console.log(str.substr(1)); // (1): ubstr

/* Percorrendo de trás para frente */
console.log(str.substr(-3, 2)); // (-3, 2): st
console.log(str.substr(-3)); // (-3): str

js substring

user9358

// the substring method returns a string out of another string

const str = 'Mozilla';

console.log(str.substring(1, 3));
// expected output: "oz"

console.log(str.substring(2));
// expected output: "zilla"

substring javascript

user4147

var str = "Hello world!";
var res = str.substring(1, 4); //ell

substring

user9046

const str = 'Mozilla';

console.log(str.substring(1, 3));
// expected output: "oz"

console.log(str.substring(2));
// expected output: "zilla"

js .substring

user3687

let anyString = 'Mozilla'

// Displays 'M'
console.log(anyString.substring(0, 1))
console.log(anyString.substring(1, 0))

// Displays 'Mozill'
console.log(anyString.substring(0, 6))

// Displays 'lla'
console.log(anyString.substring(4))
console.log(anyString.substring(4, 7))
console.log(anyString.substring(7, 4))

// Displays 'Mozilla'
console.log(anyString.substring(0, 7))
console.log(anyString.substring(0, 10))

javascript how to get middle letters of a string

user1682

 function extractMiddle(str) {

        var position;
        var length;

        if(str.length % 2 == 1) {
            position = str.length / 2;
            length = 1;
        } else {
            position = str.length / 2 - 1;
            length = 2;
        }

        return str.substring(position, position + length)
    }

    console.log(extractMiddle("handbananna"));