HORIZON PROJECT

var arrayReduceRight = require('./_arrayReduceRight'),

    baseEachRight = require('./_baseEachRight'),

    baseIteratee = require('./_baseIteratee'),

    baseReduce = require('./_baseReduce'),

    isArray = require('./isArray');

/**

 * This method is like `_.reduce` except that it iterates over elements of

 * `collection` from right to left.

 *

 * @static

 * @memberOf _

 * @since 0.1.0

 * @category Collection

 * @param {Array|Object} collection The collection to iterate over.

 * @param {Function} [iteratee=_.identity] The function invoked per iteration.

 * @param {*} [accumulator] The initial value.

 * @returns {*} Returns the accumulated value.

 * @see _.reduce

 * @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) {

  var func = isArray(collection) ? arrayReduceRight : baseReduce,

      initAccum = arguments.length < 3;

  return func(collection, baseIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);

}

module.exports = reduceRight;