Append regular expression in SublimeText

Question

I'm very new to regular expressions. I'm working on sublime text and I'm trying to replace all instances of some numbers formatted like this:

00:00:59
00:01:00
00:01:22

and so on.

Appending :00 at the end si it will become 00:00:59:00

I used [0-9]{2}:[0-9]{2}:[0-9]{2} and it finds all instances but I don't know how to append :00 and replace all instances.

Answer 1

You may use

\b[0-9]{2}:[0-9]{2}:[0-9]{2}\b

as the regex and replace with $0:00. Here, $0 is the backreference to the whole match.

                             V   

The \b stand for word boundaries. If you need to avoid matching those timestamps that already have :00 after it, you may consider using

(?<!\d:)\b\d{2}:\d{2}:\d{2}\b(?!:\d)

The (?<!\d:) negative lookbehind will fail the match if the 2 digit substring at the start is preceded with a digit + :, and the (?!:\d) negative lookahead will fail the match if the last 2 digits are followed with : + digit.