HORIZON PROJECT

var apply = require('./_apply'),

    arrayMap = require('./_arrayMap'),

    unzip = require('./unzip');

/**

 * This method is like `_.unzip` except that it accepts `iteratee` to specify

 * how regrouped values should be combined. The iteratee is invoked with the

 * elements of each group: (...group).

 *

 * @static

 * @memberOf _

 * @since 3.8.0

 * @category Array

 * @param {Array} array The array of grouped elements to process.

 * @param {Function} [iteratee=_.identity] The function to combine

 *  regrouped values.

 * @returns {Array} Returns the new array of regrouped elements.

 * @example

 *

 * var zipped = _.zip([1, 2], [10, 20], [100, 200]);

 * // => [[1, 10, 100], [2, 20, 200]]

 *

 * _.unzipWith(zipped, _.add);

 * // => [3, 30, 300]

 */

function unzipWith(array, iteratee) {

  if (!(array && array.length)) {

    return [];

  }

  var result = unzip(array);

  if (iteratee == null) {

    return result;

  }

  return arrayMap(result, function(group) {

    return apply(iteratee, undefined, group);

  });

}

module.exports = unzipWith;