Emacs regexp replace situation

Question

on emacs

Let say that I have this text:

abcd abcd. 23 where . 2 is important for catching

With \. [[:digit:]] I can catch pattern but how to replace without .

Output should be abcd abcd 23.

Answer 1

You could use capturing groups to retain the numeral.

Replace regexp:  \. ([[:digit:]])
Replace regexp with:  \1

The \1 refers to the numeral captured using ([[:digit:]]).