in reply to DNA that is a JAPH

I was just looking back on this code, much, much later, and found the matching "dnawriter.pl". It's past the readme below:

foreach $letter ( split //, shift @ARGV ) {

        @digits = ();
        $num = ord $letter;

        while ( $num ) {
                    unshift @digits, $num % 4;
                    $num = int $num / 4;
                }

        unshift @digits, 0 while @digits < 4;
        $base4 = join '', @digits;
        $base4 =~ tr/0123/ATCG/;
        $string .= $base4;

    }

print $string;

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Warning: Unless otherwise stated, code is untested. Do not use without understanding. Code is posted in the hopes it is useful, but without warranty. All copyrights are relinquished into the public domain unless otherwise stated. I am not an angel. I am capable of error, and err on a fairly regular basis. If I made a mistake, please let me know (such as by replying to this node).

In Section Obfuscated Code