Shouldn't $max_index be $min_index and look like this? 

my $min_index = @$a_ref < @$b_ref
    ? $#$a_ref
    : $#$b_ref;

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There is no need to localize or subvert $a and $b. Just make the coderef act on $_[0] and $_[1] or their lexical copies.

After Compline,
Zaxo

In reply to Re: A classic use of prototypes: map2 by Zaxo
in thread A classic use of prototypes: map2 by tkil

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