in reply to return !!
The same as:
return @value ? 1 : ''; [download]
Not quite.
$ perl -wle'print 0 + sub { my @v; !!@v }->()' 0 $ perl -wle'print 0 + sub { my @v; @v ? 1 : "" }->()' Argument "" isn't numeric in addition (+) at -e line 1. 0 [download]
And it doesn't return zero for false either.
$ perl -wle'print "" . sub { my @v; !!@v }->()' $ perl -wle'print "" . sub { my @v; @v ? 1 : 0 }->()' 0 [download]
False is actually dualvar(0, '')
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