ts_temp/array/map.js
import curryN from '../function/curryN';
/**
* Creates an array of values by running each element in list through fn. The fn is invoked with three arguments:
* (value, index, arr).
*
* @param {Function} fn The function to be called on every element of the input `list`.
* @param {Array} arr The list to be iterated over.
* @return {Array} The new list.
* @example
*
* var double = x => x * 2;
*
* map(double, [1, 2, 3]); //=> [2, 4, 6]
*/
export default curryN(2, (fn, arr = []) => {
const len = arr.length;
const result = new Array(len);
for (let i = 0; i < len; i++) {
result[i] = fn(arr[i], i, arr);
}
return result;
});