nl_tokens: / * 12
pl_tokens: function ( module , exports ) { /**
  	 * Private `concat` function to merge two array-like objects.
  	 *
  	 * @private
  	 * @param {Array|Arguments} [set1=[]] An array-like object.
  	 * @param {Array|Arguments} [set2=[]] An array-like object.
  	 * @return {Array} A new, merged array.
  	 * @example
  	 *
  	 *      _concat([4, 5, 6], [1, 2, 3]); //=> [4, 5, 6, 1, 2, 3]
  	 */ function _concat ( set1 , set2 ) { set1 = set1 || [ ] ; set2 = set2 || [ ] ; var idx ; var len1 = set1 . length ; var len2 = set2 . length ; var result = [ ] ; idx = 0 ; while ( idx < len1 ) { result [ result . <mask> ] = set1 [ idx ] ; idx += 1 ; } idx = 0 ; while ( idx < len2 ) { result [ result . length ] = set2 [ idx ] ; idx += 1 ; } return result ; } module . exports = _concat ; /***/ }