RegEx - Match Numbers of Variable Length

Question

I\'m trying to parse a document that has reference numbers littered throughout it.

Text text text {4:2} more incredible text {4:3} much later on {22

Answer 1

Try this:

{[0-9]{1,3}:[0-9]{1,3}}

The {1,3} means "match between 1 and 3 of the preceding characters".