code: function initCloneArray(array) {
      var length = array.length,
        result = new array.constructor(length);
  
      // Add properties assigned by `RegExp#exec`.
      if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
        result.index = array.index;
        result.input = array.input;
      }
      return result;
    }
docs: Initializes an array clone.
  
  @private
  @param {Array} array The array to clone.
  @returns {Array} Returns the initialized clone.