Built the map method in JS

map.js

"use strict";

var _ = {
  // Implements:
  // https://lodash.com/docs#map
  map: (array, callback) => {
    return callback(array);
  }
}

// Define a method that multiplies the input by 10
function multiplyBy10(value) {
	let result = [];
	for (let i = 0; i < value.length; i++) {
		result.push(value[i] * 10);
	}
	return (result);
}
const value = _.map([1, 2, 3], multiplyBy10);

// value => [10, 20, 30]
console.log(value);