(tye)Re2: Counting number of characters in a string

[tye]

in reply to (tye)Re: Counting number of characters in a string
in thread Counting number of characters in a string

I just realized that most strings won't have most characters in them so this can be sped up significantly via:

my $count= 0;
for( keys %{ { map {$_,1} unpack "C*", $str } }  ){
    my $c= pack "C", $_;
    $count += () = $str =~ /\Q$c\E/g;
}

        - tye (but my friends call me "Tye")