Re^3: Regex KungFu help needed

As a further step, associating patterns with their counts and (cached) regex objects in a hash may be worthwhile:

>perl -wMstrict -le
"my $sequence = 'GGGGGGGAGAAAAAAAAAAAAAAAGAAGGA';

 my %patterns =
   map { $_ => { count => 0,  regex => qr{ (?= \Q$_\E) }xms } }
   qw(AAAAA GGGGG GGAGA GAAGG)
   ;

 $patterns{$_}{count} =()=
   $sequence =~ m{ $patterns{$_}{regex} }xmsg
     for keys %patterns;

 print qq{$_: $patterns{$_}{count}} for sort keys %patterns;
"
AAAAA: 11
GAAGG: 1
GGAGA: 1
GGGGG: 3
[download]

>perl -wMstrict -le
"my $sequence = 'GGGGGGGAGAAAAAAAAAAAAAAAGAAGGA';

 my %patterns =
   map { $_ => { count => 0,  regex => qr{ (?= \Q$_\E) }xms } }
   qw(AAAAA GGGGG GGAGA GAAGG)
   ;

 $_->{count} =()= $sequence =~ m{ $_->{regex} }xmsg
     for values %patterns;

 print qq{$_: $patterns{$_}{count}} for sort keys %patterns;
"
AAAAA: 11
GAAGG: 1
GGAGA: 1
GGGGG: 3
[download]

Comment on Re^3: Regex KungFu help needed Select or Download Code

Replies are listed 'Best First'.
Re^4: Regex KungFu help needed by johngg (Canon) on Oct 03, 2009 at 11:03 UTC
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 $` [download] I expect some Monks could golf that down to seven bytes and a nybble :-) Cheers, JohnGG Update: Extra parentheses inside the map were un-necessary, removed!	[reply] [d/l]
Re^5: Regex KungFu help needed by grizzley (Chaplain) on Oct 05, 2009 at 07:17 UTC
As you wish :) `print "$_: ", $t = () = GGGGGGGAGAAAAAAAAAAAAAAAGAAGGA =~ /(?=\Q$_\E)/ +g, $/ for AAAAA,GAAGG,GGAGA,GGGGG` [download] Removing whitespaces is left as an exercise for the reader :)	[reply] [d/l]