funcdash/function/mapInvoke.js

Lodash mixin for more functional utilities.

'use strict';
var isFunction = require('lodash-compat/lang/isFunction');
var toArray = require('lodash-compat/lang/toArray');
var map = require('lodash-compat/collection/map');
var all = require('lodash-compat/collection/all');

/**
 * Creates a function that when called will return an array of results from
 * invoking each argument function with arguments.
 *
 * @static
 * @memberOf _
 * @category Function
 * @param {...Function} [functions] The functions to be invoked.
 * @returns {Function} Function that when called, returns an Array with each
 *   result of each function invoked with the given arguments.
 * @example
 *
 * var invoker = _.mapInvoke(_.add, _.multiply);
 * invoker(3, 5);
 * // => [8, 15]
 */
function mapInvoke () {
	var functions = toArray(arguments);
	if (!all(functions, isFunction)) {
		throw new Error('Expected a function');
	}
	return function () {
		var args = toArray(arguments);
		return map(functions, function (func) {
			return func.apply(null, args);
		});
	};
}
module.exports = mapInvoke;