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Logs: liberachat/#haskell

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2021-06-14 13:23:23 <Hecate> (*raison) (krkrkrkr)
2021-06-14 13:23:32 <Hecate> am grape! <- raisin d'être
2021-06-14 13:23:33 <nshepperd2> raisins only
2021-06-14 13:24:32 <nshepperd2> if you're gonna have a proxy argument you might as well just 'catch' directly
2021-06-14 13:24:44 <Hecate> or just use type applications
2021-06-14 13:24:51 <nshepperd2> since at least 'catch' makes it impossible to mix the arguments up
2021-06-14 13:25:41 <nshepperd2> from a convenience POV, `forall e a. Exception e => a -> IO a -> IO a` is probably optimal
2021-06-14 13:26:16 <Obo> Hi, n00b question, I am getting an incomplete pattern warning, what am I missing? https://paste.tomsmeding.com/sF831ybx
2021-06-14 13:26:36 <nshepperd2> (the first argument is pure `a` so it's obviously the default, and can't be confused with the other argument)
2021-06-14 13:26:48 <Obo> s/treeI1nsert/treeInsert/ in paste
2021-06-14 13:27:12 × jmcarthur quits (~jmcarthur@c-73-29-224-10.hsd1.nj.comcast.net) (Quit: My MacBook Air has gone to sleep. ZZZzzz…)
2021-06-14 13:29:04 <larryba> I like that version, listDirectorySafe path = defaultIfException @IOError [] (listDirectory path)
2021-06-14 13:29:17 <larryba> what would the proxy e call look like?
2021-06-14 13:29:36 → fizbin joins (~fizbin@2601:8a:4080:1280:8c7e:5b3f:79d6:ec26)
2021-06-14 13:29:39 → geekosaur joins (~geekosaur@xmonad/geekosaur)
2021-06-14 13:29:40 <DigitalKiwi> flipchan: note that "haskell.careers is live and you've been waiting (im)patiently for hecate' kommissar for ~2 years" would probably score a few points
2021-06-14 13:30:12 × haskman quits (~haskman@171.61.149.211) (Quit: Going to sleep. ZZZzzz…)
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2021-06-14 13:32:55 <janus> what's kommissar? an eastern german police officer?
2021-06-14 13:33:30 <janus> or is it "commission" (payment) ?
2021-06-14 13:34:08 × fizbin quits (~fizbin@2601:8a:4080:1280:8c7e:5b3f:79d6:ec26) (Ping timeout: 252 seconds)
2021-06-14 13:34:18 <nshepperd2> a high ranking soviet functionary
2021-06-14 13:34:32 → argento joins (~argent0@168-227-96-51.ptr.westnet.com.ar)
2021-06-14 13:34:49 <merijn> Obo: The compiler isn't smart enough to see that your 3 guards cover all possible cases
2021-06-14 13:34:51 <Hecate> janus: a CRM for commission workers that I planned on developing a couple of years ago
2021-06-14 13:34:57 <Hecate> never lived though
2021-06-14 13:35:05 <merijn> Obo: If you replace the final guard with "otherwise" the warning will go away
2021-06-14 13:35:06 <janus> nshepperd2: :O did not know that Hecate had the power to dispatch those from their graves
2021-06-14 13:35:18 <Hecate> ;-D
2021-06-14 13:35:38 <Obo> merijn: thanks :D
2021-06-14 13:35:54 → nsilv joins (~nsilv@212.103.198.210)
2021-06-14 13:36:08 <merijn> Obo: Basically, deciding if arbitrary boolean expressions cover all possible cases is...a non-trivial problem to put it mildly ;)
2021-06-14 13:36:09 <DigitalKiwi> janus: i wrote a time tracking program called (uncle) tito so Hecate had to outdo me
2021-06-14 13:36:15 janus is trying to resist pretending not to understand what CRM is :P
2021-06-14 13:36:24 <Hecate> janus: hehehe
2021-06-14 13:36:32 <merijn> Obo: So the compiler just checks "do you have a catch-all branch?" (otherwise is just a synonym for True)
2021-06-14 13:36:44 janus still always sees Crew Resource Management. read too many airplane crash reports :(
2021-06-14 13:38:16 <larryba> how do I check if operation failed with InvalidArgument? for some other failures there are is* functions that accept IOError https://hackage.haskell.org/package/directory-1.3.6.2/docs/System-Directory.html#v:listDirectory
2021-06-14 13:39:54 × raehik1 quits (~raehik@cpc95906-rdng25-2-0-cust156.15-3.cable.virginm.net) (Ping timeout: 264 seconds)
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2021-06-14 13:40:56 <Obo> merijn: I see. Thank you for the detailed explanation
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