in reply to Counting number of characters in a string

my $count= 0;
for(0..255){
    my $c= pack "C", $_;
    $count += () = $str =~ /\Q$c\E/g;
}

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Warning! This probably yields an inaccurate count for Unicode strings.

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

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(tye)Re2: Counting number of characters in a string
by tye (Sage) on Mar 13, 2001 at 02:54 UTC

    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;
}

    [download]
            - tye (but my friends call me "Tye")
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