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Re: Randomise a string of letters

by Rhose (Priest)
on Jan 15, 2003 at 14:35 UTC ( #227152=note: print w/replies, xml ) Need Help??


in reply to Randomise a string of letters

Using the "Randomizing an Array" example from the Perl Cookbook, I threw together the following code. Does this help?
#!/usr/bin/perl -w use strict; my $gStr='This is my string'; my @gStrArr=split('',$gStr); sub fisher_yates_shuffle { my $array = shift; my $i; for ($i = @$array; --$i;) { my $j = int rand ($i+1); next if $i == $j; @$array[$i,$j] = @$array[$j,$i]; } } fisher_yates_shuffle(\@gStrArr); $gStr=join('',@gStrArr); print $gStr,"\n";

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[Corion]: Yay. Traditional finance situation averted. Bonds can be quoted in amounts (1_000_000 EUR) or per unit (1 unit). And a traditional error is to trade 2_000_000 piece when you meant to trade 2_000_000 EUR.
[Corion]: (one of my scripts simply catches high amounts and I phone people making that trade, ideally before the payment is due)
[Corion]: The sad thing is that my script sits at the end of the pipeline and can only look at the payments due today or tomorrow basically, while there are many more systems further up in the pipeline
[GotToBTru]: better late than never, I guess
[Corion]: GotToBTru: Sure - there is a long and sad story of many frantic cleanups that led us to implement this notification ;)

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