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November 19, 2018 18:32
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Alternative + Foldable = Container
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| include :: forall a f. Alternative f => a -> f a -> f a | |
| include a f = pure a <|> f | |
| select :: forall a f. Functor f => Foldable f => f a -> Maybe a | |
| select f = unwrap $ fold (First <<< Just <$> f) |
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