Been kicking around a similar idea in the back of my mind from the first moment "functional core / imperative shell" [0] and "sans-IO" [1] infected my brain. I've been chasing that high ever since. Unfortunately, whenever I try to apply this pattern 100%, I hit all kinds of walls: language isn't expressive enough to support what I want; the amount of wiring/glue to support it becomes a burden; the resulting code is s…
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