1  var apply = require('./_apply'),
 2      arrayMap = require('./_arrayMap'),
 3      unzip = require('./unzip');
 4  
 5  /**
 6   * This method is like `_.unzip` except that it accepts `iteratee` to specify
 7   * how regrouped values should be combined. The iteratee is invoked with the
 8   * elements of each group: (...group).
 9   *
10   * @static
11   * @memberOf _
12   * @since 3.8.0
13   * @category Array
14   * @param {Array} array The array of grouped elements to process.
15   * @param {Function} [iteratee=_.identity] The function to combine
16   *  regrouped values.
17   * @returns {Array} Returns the new array of regrouped elements.
18   * @example
19   *
20   * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
21   * // => [[1, 10, 100], [2, 20, 200]]
22   *
23   * _.unzipWith(zipped, _.add);
24   * // => [3, 30, 300]
25   */
26  function unzipWith(array, iteratee) {
27    if (!(array && array.length)) {
28      return [];
29    }
30    var result = unzip(array);
31    if (iteratee == null) {
32      return result;
33    }
34    return arrayMap(result, function(group) {
35      return apply(iteratee, undefined, group);
36    });
37  }
38  
39  module.exports = unzipWith;