According to the docs (Perlfunc) on return:

If no EXPR is given, returns an empty list in list context, the undefined value in scalar context, and (of course) nothing at all in a void context.

I think this is mentioned in Perl Best Practices. I don't have a copy handy to verify it. So, the better practice seems to be to replace return undef; with return;.

A quick test shows that this works fine for boolean tests as well. We get the best of all worlds.

print "foo\n" unless foo();

sub foo {
    return;
}

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HTH,
Charles

In reply to Re^3: getting 2 things done at once with Class::Base (return undef) by CharlesClarkson
in thread getting 2 things done at once with Class::Base by princepawn

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