/** * lodash 3.0.0 (Custom Build) * Build: `lodash modern modularize exports="npm" -o ./` * Copyright 2012-2015 The Dojo Foundation * Based on Underscore.js 1.7.0 * Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors * Available under MIT license */ var baseEach = require('lodash._baseeach'), baseSlice = require('lodash._baseslice'); /** * Used as the maximum length of an array-like value. * See the [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-number.max_safe_integer) * for more details. */ var MAX_SAFE_INTEGER = Math.pow(2, 53) - 1; /** * The base implementation of `_.invoke` which requires additional arguments * to be provided as an array of arguments rather than individually. * * @private * @param {Array|Object|string} collection The collection to iterate over. * @param {Function|string} methodName The name of the method to invoke or * the function invoked per iteration. * @param {Array} [args] The arguments to invoke the method with. * @returns {Array} Returns the array of results. */ function baseInvoke(collection, methodName, args) { var index = -1, isFunc = typeof methodName == 'function', length = collection ? collection.length : 0, result = isLength(length) ? Array(length) : []; baseEach(collection, function(value) { var func = isFunc ? methodName : (value != null && value[methodName]); result[++index] = func ? func.apply(value, args) : undefined; }); return result; } /** * Checks if `value` is a valid array-like length. * * **Note:** This function is based on ES `ToLength`. See the * [ES spec](https://people.mozilla.org/~jorendorff/es6-draft.html#sec-tolength) * for more details. * * @private * @param {*} value The value to check. * @returns {boolean} Returns `true` if `value` is a valid length, else `false`. */ function isLength(value) { return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER; } /** * Invokes the method named by `methodName` on each element in `collection`, * returning an array of the results of each invoked method. Any additional * arguments are provided to each invoked method. If `methodName` is a function * it is invoked for, and `this` bound to, each element in `collection`. * * @static * @memberOf _ * @category Collection * @param {Array|Object|string} collection The collection to iterate over. * @param {Function|string} methodName The name of the method to invoke or * the function invoked per iteration. * @param {...*} [args] The arguments to invoke the method with. * @returns {Array} Returns the array of results. * @example * * _.invoke([[5, 1, 7], [3, 2, 1]], 'sort'); * // => [[1, 5, 7], [1, 2, 3]] * * _.invoke([123, 456], String.prototype.split, ''); * // => [['1', '2', '3'], ['4', '5', '6']] */ function invoke(collection, methodName) { return baseInvoke(collection, methodName, baseSlice(arguments, 2)); } module.exports = invoke;