map does, indeed, evaluate its BLOCK in list context. This is so you can say stuff like 

my $n=0;
my %position = map {$_ => $n++} @list

[download]

The simple fix is to make your block evaluate reverse in scalar context: map { scalar reverse($_) } @list.

In reply to Re: Bug? with reverse in map by ariels
in thread Bug? with reverse in map by strat

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