This is a good suggestion, and you're on the right track, but I was wondering why you return a reference to the main array. The only ones you really need to make references to are the second level deep. There's not really any need to use more references than will get the job done comfortably.

I really do like the suggestion to return an array of array references, though, instead of just returning two array references. Either way would work the same from outside the sub, though.

sub f {
    @foo = ( 1, 2 );
    @bar = ( 3, 4 );
    @all = ( \@foo, \@bar );
    return @all;
}

foreach ( f() ) {
    print @{$_};
}
[download]

isn't much different from returning two references:

sub f {
    @foo = ( 1, 2 );
    @bar = ( 3, 4 );
    return \@foo, \@bar;
}

foreach ( f() ) {
    print @{$_};
}
[download]

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