findLast.js

define(['./internal/baseEachRight', './internal/baseFind', './internal/baseFindIndex', './internal/baseIteratee', './isArray'], function(baseEachRight, baseFind, baseFindIndex, baseIteratee, isArray) {

  /** Used as a safe reference for `undefined` in pre-ES5 environments. */
  var undefined;

  /**
   * This method is like `_.find` except that it iterates over elements of
   * `collection` from right to left.
   *
   * @static
   * @memberOf _
   * @category Collection
   * @param {Array|Object} collection The collection to search.
   * @param {Function|Object|string} [predicate=_.identity] The function invoked per iteration.
   * @returns {*} Returns the matched element, else `undefined`.
   * @example
   *
   * _.findLast([1, 2, 3, 4], function(n) {
   *   return n % 2 == 1;
   * });
   * // => 3
   */
  function findLast(collection, predicate) {
    predicate = baseIteratee(predicate, 3);
    if (isArray(collection)) {
      var index = baseFindIndex(collection, predicate, true);
      return index > -1 ? collection[index] : undefined;
    }
    return baseFind(collection, predicate, baseEachRight);
  }

  return findLast;
});