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This is a common problem with no known great solution (if there is a great solution I hope someone will show it so that we can submit patches). It also annoys anyone using List::MoreUtils pairwise, for about the same reason. Several ideas were tossed around in the List::MoreUtils RT as to how to fix the problem, but none were ideal, and none fixed it in 100% of use cases (including my attempt).

The easiest solution is still annoying, and looks like this:

reduce { no warnings 'once'; $a * $b } 1 .. 6;

Update: I see that the List::Util RT suggests something like this:

reduce { our ( $a, $b ); $a * $b } 1 .. 6;


In reply to Re: Name "main::a" used only once: possible typo by davido
in thread Name "main::a" used only once: possible typo by szabgab

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