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    Correct Erlang usage mandates you do not write any kind of defensive code.

    Coming from C and Go, this has taken some getting used to, but I do rather like it.

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      What do we need to replicate this design in other languages? Supervisor trees?

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        isolated state or immutable shared state among concurrency primitives makes it much easier as well

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          Doable in Haskell due to immutability by default, channels, and cheap (cheaper than Erlang) green threads. Cloud Haskell has us started down that path, but it’s not perfect.

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          i was just wondering as i read that if racket’s custodian trees [http://docs.racket-lang.org/reference/eval-model.html#%28part._custodian-model%29] could enable a similar model of programming