And $isbit works fine here.

$base(42,10,2) == 101010

101010 : $isbit(42,1) == 0
101010 : $isbit(42,2) == 1
101010 : $isbit(42,3) == 0
... etc ...

- Raccoon

Well. At least I won lunch.
Good philosophy, see good in bad, I like!