Nice, ++

If you don't need to refer to the pattern again you can reduce that to a single step with the uncompiled pattern as key and count as value.

$ perl -Mstrict -wle '
> my $seq  = q{GGGGGGGAGAAAAAAAAAAAAAAAGAAGGA};
> my %pats = map {
>    $_, scalar( () = $seq =~ m{(?=\Q$_\E)}g );
>    } qw{ AAAAA GGGGG GGAGA GAAGG };
> print qq{$_: $pats{ $_ }} for sort keys %pats;'
AAAAA: 11
GAAGG: 1
GGAGA: 1
GGGGG: 3
$

[download]

I expect some Monks could golf that down to seven bytes and a nybble :-)

Cheers,

JohnGG

Update: Extra parentheses inside the map were un-necessary, removed!

In reply to Re^4: Regex KungFu help needed by johngg
in thread Regex KungFu help needed by drblove27

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