[erlang-questions] Re: Shared/Hybrid Heap

[Richard O'Keefe]

On 4/11/2010, at 12:35 PM, Ryan Zezeski wrote:
> *If a tree falls in the woods, does it make a sound?**If a pure function
> mutates some local data in order to produce an immutable return value, is
> that ok?*

Provided literally *nobody*, including the process in question,
can *tell*, yes, it's fine.  Witness: monads in Haskell, uniqueness
types in Clean and Mercury.