var baseForOwnRight = require('../internal/baseForOwnRight'), createFindKey = require('../internal/createFindKey'); /** * 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;