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2020-11-02 00:51:42 <Raito_Bezarius> can I unpack Maybe [a] into [a] using prelude?
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2020-11-02 00:51:50 <Raito_Bezarius> saying that None → [] and Some l → l
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2020-11-02 00:52:20 <c_wraith> why Prelude in particular?
2020-11-02 00:52:32 <Raito_Bezarius> hm, rather base libraries then
2020-11-02 00:53:01 <c_wraith> :t fromMaybe []
2020-11-02 00:53:03 <lambdabot> Maybe [a] -> [a]
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2020-11-02 00:53:09 <Raito_Bezarius> thanks, c_wraith !
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2020-11-02 01:08:08 <koz_> foldMap (: []) works too I think?
2020-11-02 01:09:37 DigitalKiWicked is now known as DigitalKiwi
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2020-11-02 01:11:10 <MarcelineVQ> that'd be Maybe a -> [a] but foldMap id should be fine
2020-11-02 01:13:28 <MarcelineVQ> > fold (Just [3]) -- I like to write fold instead of foldMap id tho
2020-11-02 01:13:31 <lambdabot> [3]
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2020-11-02 01:14:23 <koz_> MarcelineVQ: You could do 'foldMap pure' as well.
2020-11-02 01:14:28 <MarcelineVQ> 'just prelude' would be maybe [] id tho
2020-11-02 01:14:33 <koz_> But fold is the slickest.
2020-11-02 01:14:42 <koz_> 'foldMap id' is Prelude-only-able.
2020-11-02 01:15:16 <MarcelineVQ> watch this shit
2020-11-02 01:15:22 <MarcelineVQ> > concat (Just [3])
2020-11-02 01:15:24 <lambdabot> [3]
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2020-11-02 01:17:35 <koz_> MarcelineVQ: Ooooooo
2020-11-02 01:17:39 <koz_> SpoooOOOky
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2020-11-02 01:18:18 <hololeap> was concat always Foldable t => t [a] -> [a]?
2020-11-02 01:19:50 <davean> no, foldable didn't always exist, why?
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2020-11-02 01:42:10 <edwardk> clearly it should be redefined to 'foldMap toList', as the toList definition for list is the identify function, and then it can be (Foldable f, Foldable g) => f (g a) -> [a]
2020-11-02 01:42:40 <edwardk> missed opportunity
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2020-11-02 01:43:22 <edwardk> we could kill so many catMaybes with that

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