1  /** Used for built-in method references. */
 2  var objectProto = Object.prototype;
 3  
 4  /** Used to check objects for own properties. */
 5  var hasOwnProperty = objectProto.hasOwnProperty;
 6  
 7  /**
 8   * Initializes an array clone.
 9   *
10   * @private
11   * @param {Array} array The array to clone.
12   * @returns {Array} Returns the initialized clone.
13   */
14  function initCloneArray(array) {
15    var length = array.length,
16        result = new array.constructor(length);
17  
18    // Add properties assigned by `RegExp#exec`.
19    if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
20      result.index = array.index;
21      result.input = array.input;
22    }
23    return result;
24  }
25  
26  module.exports = initCloneArray;