On Feb 5, 2011, at 2:37 PM, Evan Laforge wrote:
>
> I recall reading that clojure has a concept of associative
> combination. If you can declare that certain operations are
> associative then the runtime doesn't have to care if they get out of
> order.
I think that you're thinking about the "commute" operation:
http://clojure.github.com/clojure/clojure.core-api.html#clojure.core/commute
There's more discussion elsewhere on the web, including here:
http://squirrel.pl/blog/2010/07/13/clojure-alter-vs-commute/
Cheers,
Sterl
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