What Automatic Resource Management alternatives exist for Scala?

Question

I have seen many examples of ARM (automatic resource management) on the web for Scala. It seems to be a rite-of-passage to write one, though most look pretty much like one a

Answer 1

I see a gradual 4 step evolution for doing ARM in Scala:

1. No ARM: Dirt
2. Only closures: Better, but multiple nested blocks
3. Continuation Monad: Use For to flatten the nesting, but unnatural separation in 2 blocks
4. Direct style continuations: Nirava, aha! This is also the most type-safe alternative: a resource outside withResource block will be type error.