Brilliant!
Note that you can swap without temp variables:
for( 0 .. $#$ref ) {
my $p = $_ + rand( $n-- );
@{$ref}[$p,$_] = @{$ref}[$_,$p];
}
You can even use List::Util 'shuffle':
sub my_shuffle2 {
my $ref = \@_;
use List::Util 'shuffle';
@{$ref}[0..$#$ref] = shuffle(@$ref);
return unless defined wantarray;
return wantarray ? @{ $ref } : $ref;
}
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