gistfile1.txt

case foobar() of
    {A, B} -> ...
    {A} -> ...
end
barbaz(A) <- WUT?

let's try to extend our foobar():

case foobar() of
    {A, B} -> ...
    {A} -> ...
    [] -> ...
end

OOPS BROKEN! And what if we do this properly:

A = case foobar() of
        {A, B} -> ..., A;
        {A} -> ..., A;
        [] -> default_value
    end