in reply to Re^4: How do I make a random shuffle deterministic?
in thread How do I make a random shuffle deterministic?

Thanks for the tips. It is acceptable if some hosts have the same seed. Still, lessening those occurrences is a good thing. How about this: 

sub seed {
    my $string = shift;
    my $seed;

    my @ascii = map ord, split //, $string;
    my $product = pop @ascii;
    for ( @ascii ) { $seed += $_ };

    $seed = $seed * $product;

    srand $seed;
}

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Re^6: How do I make a random shuffle deterministic?
by LanX (Saint) on Dec 05, 2012 at 17:53 UTC
    "rolfi" and "flori"?

    just a guess: try multiplying each ord with a different prime (by position) and do a module biggest prime <256 before adding.

    or start a new thread about efficient checksums! :)

    UPDATE: the automatic seeding is quite efficient, so why don't you determine a unique seed at installation time from a random number.

    Cheers Rolf

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