This F-Y shuffles the string in-place avoiding the split and join. It might be a bit more efficient, but I haven't benchmarked it. 

#! perl -slw
use strict;

sub shuffleStr {
    my $len = length $_[0];
    my ($tmp, $n);
    $n = $_+rand($len-$_)
    , $tmp = substr( $_[0], $_, 1)
    , substr( $_[0], $_, 1) = substr( $_[0], $n , 1)
    , substr( $_[0], $n , 1) = $tmp
        for 0 .. $len;
    $_[0];
}
my $string = 'the quick brown fox';

print shuffleStr($string) for 1..10;
__END__
C:\test>227145
wconbex ftkuoiqhr
xhe kbquio nfwo tcr
xen iu kwoq rtobhcf
h ftcx wikboqnreou
eoqkxhitfwun  ocrb
tbikr nuoqofwxh c e
rhtwi efuc kxobnq o
noit oquxhke bwcfr
qruwoox  eftnih kcb
oo qwnfet bcxurih k

C:\test>

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Examine what is said, not who speaks.

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In reply to Re: Randomise a string of letters by BrowserUk
in thread Randomise a string of letters by Anonymous Monk

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