HORIZON PROJECT

'use strict';

Object.defineProperty(exports, "__esModule", {

  value: true

});

exports.default = reduceRight;

var _reduce = require('./reduce');

var _reduce2 = _interopRequireDefault(_reduce);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var slice = Array.prototype.slice;

/**

 * Same as [`reduce`]{@link module:Collections.reduce}, only operates on `array` in reverse order.

 *

 * @name reduceRight

 * @static

 * @memberOf module:Collections

 * @method

 * @see [async.reduce]{@link module:Collections.reduce}

 * @alias foldr

 * @category Collection

 * @param {Array} array - A collection to iterate over.

 * @param {*} memo - The initial state of the reduction.

 * @param {Function} iteratee - A function applied to each item in the

 * array to produce the next step in the reduction. The `iteratee` is passed a

 * `callback(err, reduction)` which accepts an optional error as its first

 * argument, and the state of the reduction as the second. If an error is

 * passed to the callback, the reduction is stopped and the main `callback` is

 * immediately called with the error. Invoked with (memo, item, callback).

 * @param {Function} [callback] - A callback which is called after all the

 * `iteratee` functions have finished. Result is the reduced value. Invoked with

 * (err, result).

 */

function reduceRight(array, memo, iteratee, callback) {

  var reversed = slice.call(array).reverse();

  (0, _reduce2.default)(reversed, memo, iteratee, callback);

}

module.exports = exports['default'];