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All the Perl that's Practical to Extract and Report

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  • Took me some staring and blinking until I noticed what the regex was doing with the \G but no /g despite a loop. This is clearer:

    my $regex = qr/(\G[abcd]{0,4}(?{push @perms => [$&,$']}))/ x 4;

    It might be personal bias that I hate doing string concatenations in a loop, but this seems to be a case where the x operator is a natural fit.

    (Your final regex isn't precompiled, btw. I don't know if you are aware of that.)

    I'm not sure the output I'm seeing either way is intended, though? It simply list