array map javascript
const array1 = [1, 4, 9, 16];
// pass a function to map
const map1 = array1.map(x => x * 2);
console.log(map1);
// expected output: Array [2, 8, 18, 32]array map javascript
const array1 = [1, 4, 9, 16];
// pass a function to map
const map1 = array1.map(x => x * 2);
console.log(map1);
// expected output: Array [2, 8, 18, 32]array mdn map
let new_array = arr.map(function callback( currentValue[, index[, array]]) {
// return element for new_array
}[, thisArg])map javascript
function map(collection, action) {
let result = [];
if (Array.isArray(collection)) {
for (let i = 0; i < collection.length; i++) {
result.push(action(collection[i], i, collection));
}
}
else {
for (let key in collection) {
result.push(action(collection[key], key, collection));
}
} return result;
}Copyright © 2021 Codeinu
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