arrayReduceRight.js

/**
 * A specialized version of `_.reduceRight` for arrays without support for
 * callback shorthands and `this` binding.
 *
 * @private
 * @param {Array} array The array to iterate over.
 * @param {Function} iteratee The function invoked per iteration.
 * @param {*} [accumulator] The initial value.
 * @param {boolean} [initFromArray] Specify using the last element of `array`
 *  as the initial value.
 * @returns {*} Returns the accumulated value.
 */
function arrayReduceRight(array, iteratee, accumulator, initFromArray) {
  var length = array.length;
  if (initFromArray && length) {
    accumulator = array[--length];
  }
  while (length--) {
    accumulator = iteratee(accumulator, array[length], length, array);
  }
  return accumulator;
}

module.exports = arrayReduceRight;