Regex exclude character from the group

Question

I am trying to write this regex to match dots with a few rules

(\.+ *|([a-zA-ZÀ-ž]\.\d))(?=[^\d{1}(\.\d{1})])(?=[^.,])

But my regex is matching few characters before and after the dot as well

For example:

č.1 > match č.1 (incorrect, match should be only.)

St.M > match. (correct)

2.0 > no match (correct)

Do you have any idea, how to "exclude" these other characters from the result and match only the dot?

Thanks for your help

Answer 1

You could shorten the pattern using a positive lookbehind (?<=) asserting the character class with the specific ranges to the left.

(?<=[a-zA-ZÀ-ž])\.

Regex demo

As per the comments, the pattern with the positive lookahead

(?<=[a-zA-ZÀ-ž])\.+ *(?=[^.,])

Regex demo