Implement Promise by object parameters

promise-hash.js

'use strict';

Object.defineProperties(Promise, {
	when: {
		configurable: false,
		enumerable: false,
		writable: false,
		value: function name(hash) {

			var $q = [];
			var props = [];

			for (let key in hash) {

				if (hash.hasOwnProperty(key)) {

					props.push(key);
					$q.push(hash[key]);
				}
			}

			return Promise.all($q).then(function (data) {

				var obj = {};

				for (let i = 0; i < data.length; i++) {

					obj[props[i]] = data[i];
				}

				return obj;
			});
		}
	}
});

/**
 * Usage
 */

Promise.when({
	first: Promise.resolve('first'),
	second: Promise.resolve('second')
}).then(hash => {
	
	console.log(hash.first); //first
	console.log(hash.second); //second
});