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Logs: freenode/#haskell

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2020-10-14 13:26:10 → unlink2 joins (~unlink2@p57b852f3.dip0.t-ipconnect.de)
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2020-10-14 13:39:27 hackage uniqueness-periods-vector 0.3.1.1 - Generalization of the uniqueness-periods and uniqueness-periods-general packages functionality. https://hackage.haskell.org/package/uniqueness-periods-vector-0.3.1.1 (OleksandrZhabenko)
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2020-10-14 13:45:58 hackage http-conduit-downloader 1.1.1 - HTTP downloader tailored for web-crawler needs. https://hackage.haskell.org/package/http-conduit-downloader-1.1.1 (VladimirShabanov)
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2020-10-14 13:58:28 hackage mu-grpc-common 0.4.0.0 - gRPC for Mu, common modules for client and server https://hackage.haskell.org/package/mu-grpc-common-0.4.0.0 (AlejandroSerrano)
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2020-10-14 13:59:28 hackage mu-grpc-client 0.4.0.0 - gRPC clients from Mu definitions https://hackage.haskell.org/package/mu-grpc-client-0.4.0.0 (AlejandroSerrano)
2020-10-14 14:00:28 hackage mu-grpc-server 0.4.0.0 - gRPC servers for Mu definitions https://hackage.haskell.org/package/mu-grpc-server-0.4.0.0 (AlejandroSerrano)
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2020-10-14 14:25:18 <maerwald> yeah, why not
2020-10-14 14:25:25 × heatsink quits (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 240 seconds)
2020-10-14 14:25:34 × fendor quits (~fendor@e237-037.eduroam.tuwien.ac.at) (Ping timeout: 272 seconds)
2020-10-14 14:25:55 <merijn> ?
2020-10-14 14:26:17 <maerwald> wrt newtype
2020-10-14 14:27:39 × aqd quits (~aqd@87-92-145-87.rev.dnainternet.fi) (Quit: My MacBook has gone to sleep. ZZZzzz…)
2020-10-14 14:30:00 <nihilazo> hello, I have ghc installed on an aarch64 machine and I want to set up stack/cabal and the rest of the tooling I need for writing haskell but I don't know how when all I have rn is ghc. How can I build those other tools? Also, do I need both cabal and stack or is it a case of using one or the other? which should I use?
2020-10-14 14:30:39 <merijn> nihilazo: cabal used to have a bootstrap script
2020-10-14 14:30:58 × GyroW quits (~GyroW@unaffiliated/gyrow) (Ping timeout: 260 seconds)
2020-10-14 14:31:03 <merijn> nihilazo: Some relevant answers for you: https://gist.github.com/merijn/8152d561fb8b011f9313c48d876ceb07
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2020-10-14 14:31:23 × GyroW quits (~GyroW@d54C03E98.access.telenet.be) (Changing host)
2020-10-14 14:31:23 → GyroW joins (~GyroW@unaffiliated/gyrow)
2020-10-14 14:32:21 <merijn> nihilazo: Here's a python bootstrapping script for cabal-install (and Cabal): https://github.com/haskell/cabal/tree/master/bootstrap
2020-10-14 14:33:14 <nihilazo> ok. So, I think the tool I need is cabal-install and I need the cabal library, and I will need to bootstrap those as there's no binaries for aarch64 for those? Unless there is and I can't see them
2020-10-14 14:33:30 <merijn> I doubt there's binaries for aarch64, yeah
2020-10-14 14:34:03 → Noldorin joins (~noldorin@unaffiliated/noldorin)
2020-10-14 14:34:20 <merijn> The python script should download, build and install them and finally build Cabal and cabal-install
2020-10-14 14:36:06 <nihilazo> I have ghc already, I will see if that script works, thanks
2020-10-14 14:36:51 × polyphem quits (~p0lyph3m@2a02:810d:640:776c:76d7:55f6:f85b:c889) (Ping timeout: 272 seconds)
2020-10-14 14:36:56 <maerwald> nihilazo: http://oleg.fi/cabal-install-3.4.0.0-rc4/cabal-install-3.4.0.0-aarch64-ubuntu-18.04.tar.xz
2020-10-14 14:37:02 <maerwald> does that binary work?
2020-10-14 14:37:23 <nihilazo> I will try it
2020-10-14 14:37:45 × yoneda quits (~mike@193.206.102.122) (Quit: leaving)
2020-10-14 14:38:31 → geowiesnot joins (~user@87-89-181-157.abo.bbox.fr)
2020-10-14 14:38:49 <nihilazo> it seems to, what is a good cabal command to use to test?
2020-10-14 14:39:13 <maerwald> cabal repl --build-depends unix
2020-10-14 14:39:42 × jonathanx quits (~jonathan@dyn-8-sc.cdg.chalmers.se) (Remote host closed the connection)
2020-10-14 14:39:42 <maerwald> you probably need 'cabal update' before
2020-10-14 14:40:10 <nihilazo> well, that starts the repl, so I guess it's working
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2020-10-14 14:40:19 <nihilazo> it starts a GHCi
2020-10-14 14:40:43 <nihilazo> (after spitting out some errors about library versions)
2020-10-14 14:40:44 <nihilazo> but those don't seem to affect anything
2020-10-14 14:41:42 <nihilazo> (the errors don't, cabal seems to work)
2020-10-14 14:41:45 <nihilazo> cool, I don't need to build anything :D
2020-10-14 14:41:48 <nihilazo> thanks
2020-10-14 14:41:53 <maerwald> what errors
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2020-10-14 14:44:46 <hseg> hi. sometimes i'm testing large datasets in ghci, is there a quick way to parallelize them?
2020-10-14 14:45:10 <merijn> Depends
2020-10-14 14:45:11 <hseg> specifically, i'm looking for sth like parMap :: (a -> b) -> [a] -> [b]
2020-10-14 14:45:32 <merijn> How long are the individual functions?
2020-10-14 14:45:33 <hseg> ... well, considering i'm them mapM_ print'ing this, it doesn't need to end in [b]
2020-10-14 14:45:48 <hseg> text or runtime?
2020-10-14 14:45:52 <merijn> the runtime
2020-10-14 14:46:07 <hseg> pretty quick for the actual sizes i'm testing
2020-10-14 14:46:12 <hseg> horrible asymptotics though
2020-10-14 14:47:03 × heatsink quits (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 260 seconds)
2020-10-14 14:47:05 <merijn> I wrote a parallel map like that, but I didn't really optimise it to be low overhead, so for workloads that are less than 0.5s or whatever it's probably not efficient enough
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