CODEWITHSUNDEEP
javascriptregexstring
Shimmy Weitzhandler
Shimmy Weitzhandler

Reputation: 104692

Increment last number in string

given the following string:

Backticks[0].Folders[0]

I need to increment the latter number.

I'm not an expert with Regexp replacements, I tried this but it also selects the bracket.

href = href.replace(/\d+]$/gi, matchedNumber++);

Is it possible to do the selection, incremental and replacement in a one liner?

Upvotes: 5

Views: 1070

Answers (2)

zerkms
zerkms

Reputation: 254886

It is possible to do in one line

'Ace[0].Folders[0]'.replace(/\d+(?=]$)/, function(i) { return parseInt(i) + 1; })

Upvotes: 5

tckmn
tckmn

Reputation: 59273

Use a positive lookahead:

/\d(?=]$)/gi

This will make sure there is any character after then the end of string after the digit, without including it in the replace.

If you would like to increment it, you could use match and parseInt:

var href = this.href;
var re = /\d(?=.$)/gi
href = href.replace(re, parseInt(href.match(re))+1);

Here is a page where you can learn more about this.

Here is a fiddle.

Upvotes: 1

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