我想拼接值为3的线[3,"John",90909090]data.json{"headers":[[{"text":"Code","class":"Code"},{"text":"Code","class":"Code"}]],"rows":[[0,"Peter",51123123],[3,"John",90909090],[5,"Mary",51123123]],"config":[[0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0]],"other":[[13,0]]}我试试这个:varsize=data.rows.length