Re: ASCII file

[JavaFan]

Untested:

use autodie;
open my $fh "<", "ASCIIFILE";
my @c;
while (<$fh>) {$c[ord]++ for split //}
for ($_ = 0; $_ < @c; $_++) {
    printf "'%s' occurs %d times\n", chr, $c[$_] if $c[$_];
}