, zrangebyscore : function ( key, min, max, withscores, limit, cback ) {
            var list = [ min, max ];
            if ( key === undefined ) return error( 'ZRANGEBYSCORE', arguments );
            if ( withscores ) list.push( 'WITHSCORES' );
            if ( isArray( limit ) ) list = list.concat( 'LIMIT' ).concat( limit );