http://www.perlmonks.org?node_id=1201769


in reply to Re^2: Puzzle Regex: Letter Frequency Arithmetic Sequence
in thread Puzzle Regex: Letter Frequency Arithmetic Sequence

Nice solution of the "variable length lookbehind" not allowed problem!

But why \n instead of $ ? *

edit

I suppose it's necessary because the following assertion wouldn't be executed?

update

*) well, I just noticed the "@_\n@_" part where you are doubling the input, which explains the "\n" and some other confusion about pos.

I agree, "too much cheating!" ;-p

Cheers Rolf
(addicted to the Perl Programming Language and ☆☆☆☆ :)
Je suis Charlie!