如何在jQuery中找到字符串的子字符串？

Question

I can you please tell me how to split string to get out put.

• If I have this string: 'tc_1' Output is : first String : 'tc_' second string: '1'
• If I have this string: 'tc_1_tc_1' Output is : first String : 'tc_1_tc_' second string: '1'
• If I have this string: 'tc_1_tc_1_tc_2' Output is : first String : 'tc_1_tc_1_' second string: '2'

in jQuery ?

I use this

var index = id.indexOf("_");
var count = id.substring(index + 1, id.length)

It works for the first case but does not work in other cases.

Answer 1

You can use String.prototype.lastIndexOf() :

var index = id.lastIndexOf("_");
var count = id.substring(index + 1);

Also, you don't need the second argument id.length to substring() .