a if (my $o) = b;
c unless $o;

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Um, that's a list assignment in scalar context you've got there; probably not what you intended: 
$ perl -wl
print "if!" if (my $o) = 0;
print "unless!" unless $o;
__END__
if!
unless!

[download]

In reply to Re: Useless unless by ysth
in thread Useless unless by GrandFather

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