nl_tokens: / * 快速排序，按某个属性，或按“获取排序依据的函数”，来排序 .
pl_tokens: function sortBy ( arr , prop , desc ) { var props = [ ] , ret = [ ] , i = 0 , len = arr . length ; if ( typeof prop == 'string' ) { for ( ; i < len ; i ++ ) { var oI = arr [ i ] ; ( props [ i ] = new String ( oI && oI [ prop ] || '' ) ) . _obj = oI ; } } else if ( typeof prop == 'function' ) { for ( ; i < len ; i ++ ) { var _oI = arr [ i ] ; ( props [ i ] = new <mask> ( _oI && prop ( _oI ) || '' ) ) . _obj = _oI ; } } else { throw '参数类型错误'; } props . sort ( ) ; for ( i = 0 ; i < len ; i ++ ) { ret [ i ] = props [ i ] . _obj ; } if ( desc ) ret . reverse ( ) ; return ret ; }