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From Matthias Friedrich <>
Subject Aggregator properties
Date Mon, 12 Nov 2012 18:12:34 GMT

I would guess that Aggregator implementations have to be associative
and commutative. Otherwise they can't be used in Combiners in a
deterministic way. Am I right?

If this is the case I'd suggest we add a big fat warning to our
StringConcatAggregator, because string concatenation isn't
commutative. Or maybe even remove it from our core API because it's a
bad role model?


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