string title = "title1";
If I want to make it title2 how can I?
as I cant convert whole as int, may something like cropping or trimming ?
title suffix(1) is not a fixed number
just I want to alter the last digit which always be a int
4 Answers
title = title.slice(0,-1) + (+title.replace(/\D/g, '') + 1);
or
title = title.slice(0,-1) + (+title.slice(-1) + 1);
or
title = title.replace(/\d+/g, function(x) {return ++x});
2 Comments
huysentruitw
return (+x)+1 can be written as return ++x
adeneo
@WouterHuysentruit Yes it can, and \d+ would match numbers higher than 9
Since the number can be more than one char, the answer using splice will not work.
So it's best to first get the number and increment it:
var title = "title1";
var i = title.substr(5);
console.log("title" + ++i);
Output
title2
Comments
title = title.slice(0,(title.indexOf('e')+1)-title.length) + '2';
This will remove all characters after the letter 'e' in title and add the number at the end
Comments
This answer solved my Problem, the most dynamic way to do so...
var title = "title1";
var i = title.substr(5);
var newTitle = ("title" + ++i);
title = title.replace('1', '2');title = title.slice(0,-1) + 2;