Created
March 27, 2023 10:08
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Alternative to early return in Functional Programming
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| checkUserForPromotion :: User -> Either String User | |
| checkUserForPromotion user = | |
| case (user.age > 18, user.country, length user.purchases > 5) of | |
| (True, France, True) -> Right (user { status = Vip }) | |
| (False, _, _) -> Left "trop jeune" | |
| (True, _, False) -> Left "pas assez d'achats" | |
| (True, _, True) -> Left "pas français" |
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