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... it always performs the join even if there is no second element.

By this, I think you mean that there is a  '_' present in all cases, even if it the last (and dangling) character in the unpack-ed string.

I tried essentially the same code as jethro under ActiveState 5.8.9 and Strawberries, and and get no extraneous underscore.

>perl -wMstrict -le "my $p = 'ABCDabcdABCDabcd' . pack 'V', 0x3039; print qq{'$p'}; ;; my $unp = join '_', unpack 'H32V*', $p; print qq{'$unp'}; ;; $p = 'ABCDabcdABCDabcd'; print qq{'$p'}; ;; $unp = join '_', unpack 'H32V*', $p; print qq{'$p'}; " 'ABCDabcdABCDabcd90 ' '41424344616263644142434461626364_12345' 'ABCDabcdABCDabcd' 'ABCDabcdABCDabcd'

Can you supply a short, stand-alone code example that demonstrates the effect you seek to avoid?

In reply to Re: Casting return value of unpack properly by AnomalousMonk
in thread Casting return value of unpack properly by puterboy

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