Just to confuse things more... :)

Either learn them or just use (), and if you need a reference, reference the hash or array you created with a backslash. (em added)

Just be careful that you remember that that means:

%hash = (foo => 'foo', bar => 'bar');
$href = \%hash;
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And not:

$href = \(foo => 'foo', bar => 'bar');

Because the latter won't do what you might think. (It would be the same as:

$href = (\'foo', \'foo', \'bar', \'bar');  # which reduces to...
$href = \'bar';
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which is almost certainly not what you want.)

bbfu
Black flowers blossum
Fearless on my breath