I need to write a subroutine that takes an array and shuffles it, however it has to ensure that the values in the new array are not in their original position.
I came up with the following code and it appears to do what I want, though I am not completely sure yet. For whatever reason, the for loop doesn't work on the last element, so I just handle it outside the loop.
sub shuffleArray
{
my @array = @_;
my $length = @array;
for(my $i = 0; $i < $length - 1; $i++)
{
my $random = int rand($length -1);
if ($i eq $random){$i--;}
else{@array[$i,$random] = @array[$random, $i];}
}
my $random = int rand($length -2);
@array[$random,$length -1] = @array[$length -1,$random];
return @array;
}
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