code: function validate(cmd, args, info) {
    AbstractCommand.prototype.validate.apply(this, arguments);
    var withscores;
    if(args.length > 3) {
      withscores = ('' + args[3]).toLowerCase();
      if(withscores !== Constants.ZSET.WITHSCORES) {
        throw CommandSyntax;
      }
      args[3] = withscores;
    }
  }
docs: Validate the ZRANGE command.