Oops, formatting necesse est!

Its only now that I saw the other solutions. I didn't time it, but regex should be to much overhead. Is that correct? 

sub uni{
    my ($s) = shift;
    my @a;
    for $i (0..9) {
        $j = int(substr($s,$i,1));
        if ($a[$j]) {return( 0 )};
        $a[$j] = 1;}
    return 1; }

 print uni("1902356784");

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In reply to Re^2: Determining uniqueness in a string. by Anonymous Monk
in thread Determining uniqueness in a string. by Yzzyx

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