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Logs: liberachat/#haskell

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2021-05-24 01:14:49 <ski> yea .. but that's not the same as the applicative operators
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2021-05-24 01:50:25 <Carter> Yeah
2021-05-24 02:02:53 <boxscape> @hoogle [(a, b)] -> ([a] -> c) -> ([b] -> d) -> (a, d)
2021-05-24 02:02:54 <lambdabot> No results found
2021-05-24 02:02:59 → fart joins (68e8ca7b@user/actor)
2021-05-24 02:03:14 <boxscape> hmm
2021-05-24 02:04:22 <boxscape> % :t \f g -> bimap f g . unzip
2021-05-24 02:04:22 <yahb> boxscape: forall {a} {b1} {b2} {d}. ([a] -> b1) -> ([b2] -> d) -> [(a, b2)] -> (b1, d)
2021-05-24 02:04:23 <boxscape> okay
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2021-05-24 02:09:04 <ezzieyguywuf> so, object-oriented programming isn't inherently imperitive programming. is it? for example, I'm reading a problem statement that says "implement the MyLinkedList class". So, by design, I have to ose OOP. but I can still use a functional programming style here, can't I?
2021-05-24 02:09:41 → heath joins (~heath@68.68.64.38)
2021-05-24 02:10:22 <ski> yes
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2021-05-24 02:10:31 <ezzieyguywuf> thought so
2021-05-24 02:10:57 <ezzieyguywuf> i always get tripped up - whenever I see OOP I assume "oh boi, here we go", but (a) there's a time and place for it, and (b) it does not presume imperitive
2021-05-24 02:11:04 <ezzieyguywuf> and (c) sometimes you want imperitive
2021-05-24 02:11:14 <ski> mm
2021-05-24 02:11:34 <ezzieyguywuf> I'm actually curious as to how some of the c++20 stuff can translate into a more functional-friendly programming style
2021-05-24 02:12:15 <ezzieyguywuf> specifically it seems with "concepts" they're trying to mimic some of the behaviour we get with typeclasses
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2021-05-24 02:21:32 × Jeanne-Kamikaze quits (~Jeanne-Ka@192.252.212.15) (Quit: Leaving)
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2021-05-24 02:22:37 <seL4> writing formally verified program with 50 lines of haskell, how hard?
2021-05-24 02:22:47 <seL4> can I prove by hand?
2021-05-24 02:27:15 <Axman6> Yes
2021-05-24 02:27:41 <Axman6> Interesting choice of nickname seL4, are(/were) you part of trustworthy systems?
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2021-05-24 02:28:04 <seL4> no, but I would like to learn how to write formally verified code
2021-05-24 02:28:18 <seL4> how hard is formally verified assembly
2021-05-24 02:29:12 <dibblego> you want the isabelle proof assistant
2021-05-24 02:29:22 <Axman6> Go and look at the seL4 project and find out ;)
2021-05-24 02:29:35 <seL4> I thought isabelle uses c not assembly
2021-05-24 02:29:54 <seL4> I'm reading book about coq but that uses gallina
2021-05-24 02:30:11 <Axman6> Go and look at the seL4 project, there's probably no better resource
2021-05-24 02:31:43 <seL4> I saw the website, which link?
2021-05-24 02:32:02 <seL4> read faq, etc. don't see formally verified assembly
2021-05-24 02:32:34 <seL4> read whitepaper
2021-05-24 02:34:13 <seL4> ok I see it
2021-05-24 02:35:11 <seL4> rip its a pdf
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2021-05-24 02:36:16 <Axman6> it's all open source, all the code is available on github\
2021-05-24 02:37:32 <seL4> yeah I cloned it, but how does that teach me formally verified assembly?
2021-05-24 02:38:21 <dibblego> do a an undergrad research thesis, that's how the-person-I-live-with is learning it
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2021-05-24 02:39:06 <seL4> ok, will try
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2021-05-24 02:43:36 <Axman6> seL4: to learn cutting edge research, you're going to need to read some research papers, and almost certainly spend a lot of time learning the findamentals of softeware verification
2021-05-24 02:43:54 <seL4> yeah I will read book about coq
2021-05-24 02:44:07 <seL4> is it possible to write all proofs by hand
2021-05-24 02:44:18 <Axman6> things like Hoare triples, and... functional equivalence? IT's been a long time since I've looked into it
2021-05-24 02:45:11 <seL4> so it is possible?
2021-05-24 02:45:57 <Axman6> sure
2021-05-24 02:46:02 <keltono> seL4: you should read software foundations
2021-05-24 02:46:05 <keltono> https://softwarefoundations.cis.upenn.edu/
2021-05-24 02:46:57 <seL4> yeah thats the one I found! no pdf, just html
2021-05-24 02:49:23 <seL4> wait so RFNOMNT can block syscalls?
2021-05-24 02:49:46 <seL4> oops, my bad. thanks
2021-05-24 02:49:49 ← seL4 parts (~seL4@47.187.204.61) ()
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2021-05-24 03:15:10 <Carter> Huh.
2021-05-24 03:15:37 <Carter> Axman6 dibblego: I read that the sel4 team got dissolved :(
2021-05-24 03:16:07 <dibblego> Data61 now has very low wattage light bulbs in charge of all the things
2021-05-24 03:16:19 <Carter> Bummer
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