| /** |
| * Lo-Dash 2.4.1 (Custom Build) <http://lodash.com/> |
| * Build: `lodash modularize exports="node" -o ./compat/` |
| * Copyright 2012-2013 The Dojo Foundation <http://dojofoundation.org/> |
| * Based on Underscore.js 1.5.2 <http://underscorejs.org/LICENSE> |
| * Copyright 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors |
| * Available under MIT license <http://lodash.com/license> |
| */ |
| var createCallback = require('../functions/createCallback'), |
| forOwnRight = require('./forOwnRight'); |
| |
| /** |
| * This method is like `_.findKey` except that it iterates over elements |
| * of a `collection` in the opposite order. |
| * |
| * If a property name is provided for `callback` the created "_.pluck" style |
| * callback will return the property value of the given element. |
| * |
| * If an object is provided for `callback` the created "_.where" style callback |
| * will return `true` for elements that have the properties of the given object, |
| * else `false`. |
| * |
| * @static |
| * @memberOf _ |
| * @category Objects |
| * @param {Object} object The object to search. |
| * @param {Function|Object|string} [callback=identity] The function called per |
| * iteration. If a property name or object is provided it will be used to |
| * create a "_.pluck" or "_.where" style callback, respectively. |
| * @param {*} [thisArg] The `this` binding of `callback`. |
| * @returns {string|undefined} Returns the key of the found element, else `undefined`. |
| * @example |
| * |
| * var characters = { |
| * 'barney': { 'age': 36, 'blocked': true }, |
| * 'fred': { 'age': 40, 'blocked': false }, |
| * 'pebbles': { 'age': 1, 'blocked': true } |
| * }; |
| * |
| * _.findLastKey(characters, function(chr) { |
| * return chr.age < 40; |
| * }); |
| * // => returns `pebbles`, assuming `_.findKey` returns `barney` |
| * |
| * // using "_.where" callback shorthand |
| * _.findLastKey(characters, { 'age': 40 }); |
| * // => 'fred' |
| * |
| * // using "_.pluck" callback shorthand |
| * _.findLastKey(characters, 'blocked'); |
| * // => 'pebbles' |
| */ |
| function findLastKey(object, callback, thisArg) { |
| var result; |
| callback = createCallback(callback, thisArg, 3); |
| forOwnRight(object, function(value, key, object) { |
| if (callback(value, key, object)) { |
| result = key; |
| return false; |
| } |
| }); |
| return result; |
| } |
| |
| module.exports = findLastKey; |