Unless your XS version is quicker than my Inline C algorithm: 

__DATA__
__C__
int uniq( char* s ) {
    int i;
    int t = 0;
    for( i=0; i<10; i++ ) {
        t |= 1 << ( s[i] - 48 );
    }
    return t == 1023;
}

[download]

which doesn't seem likely, then the big hash lookup will still be faster,

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
Lingua non convalesco, consenesco et abolesco. -- Rule 1 has a caveat! -- Who broke the cabal?
"Science is about questioning the status quo. Questioning authority".
The "good enough" maybe good enough for the now, and perfection maybe unobtainable, but that should not preclude us from striving for perfection, when time, circumstance or desire allow.

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

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