nl_tokens: * @method keys ( <obj > [ fn ] ) @returns Array @short Returns an array containing the keys in <obj > . Optionally calls [ fn ] for each key . @extra This method is provided for browsers that don t support it natively and additionally is enhanced to accept the callback [ fn ] . Returned keys are in no particular order . %keys% is available as an instance method on extended objects . @example
pl_tokens: function ( obj , fn ) { var keys = object . keys ( obj ) ; keys . forEach ( function ( key ) { fn . call ( obj , key , obj [ <mask> ] ) ; } ) ; return keys ; }