nl_tokens: ********************** 对象操作 ************************ sort Object attributes by function and transfer them into array
pl_tokens: function isDescriptor ( desc ) { if ( ! desc || ! desc . hasOwnProperty ) { return false ; } var keys = [ 'value' , 'initializer' , 'get' , 'set' ] ; for ( var i = 0 , l = <mask> . length ; i < l ; i ++ ) { if ( desc . hasOwnProperty ( keys [ i ] ) ) { return true ; } } return false ; }