mirror of
https://github.com/whoisclebs/lodash.git
synced 2026-02-02 16:17:50 +00:00
92 lines
3.0 KiB
JavaScript
92 lines
3.0 KiB
JavaScript
/**
|
|
* lodash 3.0.1 (Custom Build) <https://lodash.com/>
|
|
* Build: `lodash modern modularize exports="npm" -o ./`
|
|
* Copyright 2012-2015 The Dojo Foundation <http://dojofoundation.org/>
|
|
* Based on Underscore.js 1.8.2 <http://underscorejs.org/LICENSE>
|
|
* Copyright 2009-2015 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
|
|
* Available under MIT license <https://lodash.com/license>
|
|
*/
|
|
var baseCallback = require('lodash._basecallback'),
|
|
baseFind = require('lodash._basefind'),
|
|
baseForRight = require('lodash._baseforright'),
|
|
keys = require('lodash.keys');
|
|
|
|
/**
|
|
* The base implementation of `_.forOwnRight` without support for callback
|
|
* shorthands and `this` binding.
|
|
*
|
|
* @private
|
|
* @param {Object} object The object to iterate over.
|
|
* @param {Function} iteratee The function invoked per iteration.
|
|
* @returns {Object} Returns `object`.
|
|
*/
|
|
function baseForOwnRight(object, iteratee) {
|
|
return baseForRight(object, iteratee, keys);
|
|
}
|
|
|
|
/**
|
|
* Creates a `_.findKey` or `_.findLastKey` function.
|
|
*
|
|
* @private
|
|
* @param {Function} objectFunc The function to iterate over an object.
|
|
* @returns {Function} Returns the new find function.
|
|
*/
|
|
function createFindKey(objectFunc) {
|
|
return function(object, predicate, thisArg) {
|
|
predicate = baseCallback(predicate, thisArg, 3);
|
|
return baseFind(object, predicate, objectFunc, true);
|
|
};
|
|
}
|
|
|
|
/**
|
|
* 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 `predicate` the created `_.property`
|
|
* style callback returns the property value of the given element.
|
|
*
|
|
* If a value is also provided for `thisArg` the created `_.matchesProperty`
|
|
* style callback returns `true` for elements that have a matching property
|
|
* value, else `false`.
|
|
*
|
|
* If an object is provided for `predicate` the created `_.matches` style
|
|
* callback returns `true` for elements that have the properties of the given
|
|
* object, else `false`.
|
|
*
|
|
* @static
|
|
* @memberOf _
|
|
* @category Object
|
|
* @param {Object} object The object to search.
|
|
* @param {Function|Object|string} [predicate=_.identity] The function invoked
|
|
* per iteration.
|
|
* @param {*} [thisArg] The `this` binding of `predicate`.
|
|
* @returns {string|undefined} Returns the key of the matched element, else `undefined`.
|
|
* @example
|
|
*
|
|
* var users = {
|
|
* 'barney': { 'age': 36, 'active': true },
|
|
* 'fred': { 'age': 40, 'active': false },
|
|
* 'pebbles': { 'age': 1, 'active': true }
|
|
* };
|
|
*
|
|
* _.findLastKey(users, function(chr) {
|
|
* return chr.age < 40;
|
|
* });
|
|
* // => returns `pebbles` assuming `_.findKey` returns `barney`
|
|
*
|
|
* // using the `_.matches` callback shorthand
|
|
* _.findLastKey(users, { 'age': 36, 'active': true });
|
|
* // => 'barney'
|
|
*
|
|
* // using the `_.matchesProperty` callback shorthand
|
|
* _.findLastKey(users, 'active', false);
|
|
* // => 'fred'
|
|
*
|
|
* // using the `_.property` callback shorthand
|
|
* _.findLastKey(users, 'active');
|
|
* // => 'pebbles'
|
|
*/
|
|
var findLastKey = createFindKey(baseForOwnRight);
|
|
|
|
module.exports = findLastKey;
|