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JavaScript's functional programming helper library.

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define(['./max', './_getLength', './pluck'], function (max, _getLength, pluck) {

  // Complement of zip. Unzip accepts an array of arrays and groups
  // each array's elements on shared indices.
  function unzip(array) {
    var length = (array && max(array, _getLength).length) || 0;
    var result = Array(length);

    for (var index = 0; index < length; index++) {
      result[index] = pluck(array, index);
    }
    return result;
  }

  return unzip;

});