Disappointments:
# Unfortunate scalar conversion
my @foo = @_ || @bar;
# Unfortunate error, not DWIM-compatible
my @foo = @_;
@foo ||= @bar;
Although there are many good solutions posted here, how about a bad one?
my @bar = qw[ dog cat frog ];
sub foo
{
my @foo = grep{length}(@_, (!@_ && @bar));
print join(',', @foo),"\n";
}
Hey, it works, but it's quite brittle. If you even think about changing the order of the parameters, you're into SCALAR land.
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