Haskell do notation considered harmful https://wiki.haskell.org/Do_notation_considered_harmful …
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AFAICT you need this because of laziness. Without laziness, you can rely solely on typing the effects, since the evaluation order of expressions is always defined, so the effects will end up happening in order. With laziness, you need to make sure that dependencies exist
Thanks. Twitter will use this to make your timeline better. UndoUndo
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