lodash/collection/reduceRight.js

define(['../internal/arrayReduceRight', '../internal/baseCallback', '../internal/baseEachRight', '../internal/baseReduce', '../lang/isArray'], function(arrayReduceRight, baseCallback, baseEachRight, baseReduce, isArray) {

  /**
   * This method is like `_.reduce` except that it iterates over elements of
   * `collection` from right to left.
   *
   * @static
   * @memberOf _
   * @alias foldr
   * @category Collection
   * @param {Array|Object|string} collection The collection to iterate over.
   * @param {Function} [iteratee=_.identity] The function invoked per iteration.
   * @param {*} [accumulator] The initial value.
   * @param {*} [thisArg] The `this` binding of `iteratee`.
   * @returns {*} Returns the accumulated value.
   * @example
   *
   * var array = [[0, 1], [2, 3], [4, 5]];
   *
   * _.reduceRight(array, function(flattened, other) {
   *   return flattened.concat(other);
   * }, []);
   * // => [4, 5, 2, 3, 0, 1]
   */
  function reduceRight(collection, iteratee, accumulator, thisArg) {
    var func = isArray(collection) ? arrayReduceRight : baseReduce;
    return func(collection, baseCallback(iteratee, thisArg, 4), accumulator, arguments.length < 3, baseEachRight);
  }

  return reduceRight;
});