How to use .attr("name") when the name has an array structure

Question

I want to get the length of a radio button using the jquery syntax .length

The radio button names are like the following obj[1], obj[2] and so on. If I address it directly $("input:radio[name='obj[1]']:checked").length I get the correct length.

If I get the name using .attr("name") and try to get the $("input:radio[name="+name+"]:checked").length I do not get the correct length.

Please help with correct syntax how to address the radio buttons by name.

Answer 1

Problem is, in 2nd method, you are missing quotes. Use this:

$("input:radio[name='"+name+"']:checked").length

If name contains special characters including [] it has to be quoted, like you did in first case. You are just appending content of name variable into string, which is sent into jQuery like in the first case.