Actually that return 0 unless defined bit was a ghastly way of checking whether there was even something to sort. Thanks for your interpretation and improvement of my lines. :-) (And thank you for the illustration of this other way of using sort that I didn't know/think about before. I've needed this for a while....)

In reply to Re^2: Accessing $a and $b of 'sort' across package boundaries by ff
in thread Accessing $a and $b of 'sort' across package boundaries by ff

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