[ refactor ] Stream's iterate #530
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* Instead of stacking `map` after `map` on top of each other, we use `unfold`'s internal state to carry the updated seed value. * Because `unfold`'s argument is of type `A → A × A`, we could easily introduce a bug here so we also prove a correction lemma for the refactored version.
gallais
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Oooh wow, a use case for |
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Instead of stacking
mapaftermapon top of each other, weuse
unfold's internal state to carry the updated seed value.Because
unfold's argument is of typeA → A × A, we could easilyintroduce a bug here so we also prove a correction lemma for the
refactored version.