Isn't simpler to use perl?
Perl -pe 's/.(capture this)./$1/'
That way, you can capture multiple groups, and change the format in the output. You can also do simple calculations if you capture numbers
Perl -pe 's/.(capture this)./$1/'
That way, you can capture multiple groups, and change the format in the output. You can also do simple calculations if you capture numbers
I also tried putting this question in GPT3:
> Isn't simpler to use perl?
> It is simpler to use Perl, but it is not as efficient as using C or C++.
- I don't think the regex engine in Perl is implemented in Perl. It's probably implemented in C/C++, like grep. libpcre is in C anyway.
- Even if grep is/were more efficient, You might have consumed more time and energy thinking, typing and running "grep --only-matching --perl-regexp 'prefix \K\d+(?= suffix)'" than the suggested perl solution
- I might have consumed even more energy typing this reply. My computer is there, waiting for me typing, doing not much.
grep -oP 'prefix \K\d+(?= suffix)'
actually even that is not true, perldoc on regular expressions really helps even grep users