Home freenode/#haskell: Logs Calendar

Logs: freenode/#haskell

←Prev  Next→
Page 1 .. 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 .. 5022
— 502,152 events total
2020-11-26 20:34:14 <shapr> but is that all I need to use any library from hackage?
2020-11-26 20:34:29 <sm[m]> tomsmeding: definitely not :)
2020-11-26 20:34:35 <shapr> I've read that some of nix+haskell means I'm limited to a single version of the libraries, is that true?
2020-11-26 20:35:02 <sm[m]> but I think glguy should use dhall. Slow him down a bit.
2020-11-26 20:35:05 × kish` quits (~oracle@unaffiliated/oracle) (Ping timeout: 240 seconds)
2020-11-26 20:35:30 hackage ukrainian-phonetics-basic 0.3.1.2 - A library to work with the basic Ukrainian phonetics and syllable segmentation. https://hackage.haskell.org/package/ukrainian-phonetics-basic-0.3.1.2 (OleksandrZhabenko)
2020-11-26 20:35:36 <shapr> sm[m]: haha!
2020-11-26 20:36:23 <avdb> Can you mix list comprehensions with if statements in haskell?
2020-11-26 20:36:45 <koz_> avdb: You mean, you want to have conditional logic _in_ the list comprehension?
2020-11-26 20:36:46 <avdb> [x | x <- lst, if x == foo then succ x else x]
2020-11-26 20:36:49 <avdb> Yes!
2020-11-26 20:37:07 <shapr> you can also do pattern matches inside the list comp
2020-11-26 20:37:17 <avdb> how?
2020-11-26 20:37:56 × royal_screwup21 quits (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9) (Ping timeout: 240 seconds)
2020-11-26 20:37:56 <shapr> or for extra insanity, there's TransformListComp: https://github.com/shapr/tmuxmarta/blob/master/src/Lib.hs#L65
2020-11-26 20:37:59 <ski> there are no `if' statements in Haskell
2020-11-26 20:38:10 <shapr> but I think I'm the only person who's used TransformListComp in the past few years :-P
2020-11-26 20:38:38 ski was just reading about them a bit, earlier today
2020-11-26 20:38:50 <ski> (looking at some of ProfTeggy's papers)
2020-11-26 20:38:50 <tomsmeding> there are 'if' expressions, though
2020-11-26 20:38:51 <shapr> ski: I should try some monad comprehensions
2020-11-26 20:38:58 <avdb> ski: if then else grrr
2020-11-26 20:39:14 <avdb> I don't know how to use Monads, Functors or any of those exotic tools
2020-11-26 20:39:16 × aidecoe quits (~aidecoe@unaffiliated/aidecoe) (Ping timeout: 240 seconds)
2020-11-26 20:39:43 <ski> avdb : do you want to, conditionally, either collect `x' or `succ x', with `x' being drawn from `lst' ?
2020-11-26 20:39:50 <shapr> avdb: oh functors are so cool!
2020-11-26 20:39:52 <avdb> Yes
2020-11-26 20:40:00 <shapr> avdb: it's like "apply this function inside this container"
2020-11-26 20:40:08 <shapr> avdb: have you used map?
2020-11-26 20:40:24 <ski> > [if x `mod` 3 == 0 then succ x else x | x <- [0 .. 9]]
2020-11-26 20:40:27 <lambdabot> [1,1,2,4,4,5,7,7,8,10]
2020-11-26 20:40:29 <shapr> > map (* (-1)) [1..9]
2020-11-26 20:40:29 <avdb> Not yet ...
2020-11-26 20:40:31 <lambdabot> [-1,-2,-3,-4,-5,-6,-7,-8,-9]
2020-11-26 20:40:32 <avdb> Thanks
2020-11-26 20:40:32 <ski> something like that ?
2020-11-26 20:40:49 <shapr> > map (+1) [5..9]
2020-11-26 20:40:50 → aidecoe joins (~aidecoe@unaffiliated/aidecoe)
2020-11-26 20:40:52 <lambdabot> [6,7,8,9,10]
2020-11-26 20:40:57 <shapr> :t map
2020-11-26 20:40:59 <lambdabot> (a -> b) -> [a] -> [b]
2020-11-26 20:41:01 × wroathe quits (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 264 seconds)
2020-11-26 20:41:03 → mputz joins (~Thunderbi@dslb-084-058-211-084.084.058.pools.vodafone-ip.de)
2020-11-26 20:41:07 × nullheroes quits (~danielvu@168.235.66.22) (Quit: WeeChat 2.9)
2020-11-26 20:41:14 <ski> > [y | x <- [0 .. 9],let y = if x `mod` 3 == 0 then succ x else x] -- another way to say the same thing
2020-11-26 20:41:16 <shapr> avdb: map says "give me a function, and a list, and I'll apply the function to each element in the list, and give you the result"
2020-11-26 20:41:17 <lambdabot> [1,1,2,4,4,5,7,7,8,10]
2020-11-26 20:41:32 <avdb> I also intentionally ask my questions it in a totally different manner so that I have to edit the code and use my brains :P
2020-11-26 20:41:34 tomsmeding is happy in this instance that the Haskell legacy hasn't made fmap and map the same thing -- sucks with explaining
2020-11-26 20:42:12 × sondr3 quits (~sondr3@cm-84.211.56.132.getinternet.no) (Quit: Leaving)
2020-11-26 20:42:22 <ski> > [y | x <- [0 .. 9],let y | x `mod` 3 == 0 = succ x | otherwise = x] -- yet another variation
2020-11-26 20:42:23 <shapr> avdb: that's smart, using your brain is good but takes work
2020-11-26 20:42:24 <lambdabot> [1,1,2,4,4,5,7,7,8,10]
2020-11-26 20:42:43 <avdb> Oh wow ... you can play with the x on the left hand side? Learned something new today about haskell ...
2020-11-26 20:42:54 <ski> tomsmeding : they were the same thing, in the past
2020-11-26 20:43:05 <koz_> avdb: If you've seen set comprehensions, this will feel very familiar.
2020-11-26 20:43:11 <ski> hm, on the left-hand side of what ?
2020-11-26 20:43:20 <avdb> Of list comprehensions
2020-11-26 20:43:31 <ski> do you mean, before the first `|' ?
2020-11-26 20:43:43 <ski> you can put any expression there
2020-11-26 20:43:43 × cosimone quits (~cosimone@2001:b07:ae5:db26:d849:743b:370b:b3cd) (Remote host closed the connection)
2020-11-26 20:43:47 → Deide joins (~Deide@217.155.19.23)
2020-11-26 20:43:51 <ski> including `if'-`then'-`else' expressions
2020-11-26 20:43:52 <tomsmeding> ski: were they? I've only heard the complaints from people that wanted 'map' gone and have 'fmap' called 'map' for consistency, but maybe those were also not aware that this hasn't always been like that?
2020-11-26 20:44:07 → cosimone joins (~cosimone@2001:b07:ae5:db26:d849:743b:370b:b3cd)
2020-11-26 20:45:00 → jonatanb joins (~jonatanb@83.24.220.252.ipv4.supernova.orange.pl)
2020-11-26 20:45:07 × avdb quits (~avdb@ip-81-11-215-86.dsl.scarlet.be) (Quit: avdb)
2020-11-26 20:45:23 <shapr> ski has been writing Haskell longer than I have!
2020-11-26 20:45:45 <ski> tomsmeding : <http://www.ki.informatik.uni-frankfurt.de/doc/html/Haskell1.4/standard-prelude.html#$tFunctor>
2020-11-26 20:46:02 <shapr> wow, that's old school
2020-11-26 20:46:02 <ski> tomsmeding : also check out `MonadPlus', just below
2020-11-26 20:46:14 <shapr> I didn't get into Haskell until .. ghc4? ghc5? something like that
2020-11-26 20:46:32 <shapr> What was the hot new ghc in ~2000 ?
2020-11-26 20:46:46 shapr checks
2020-11-26 20:46:47 <tomsmeding> fascinating, (++) in MonadPlus
2020-11-26 20:46:48 <shapr> ah, april 2001
2020-11-26 20:47:10 <tomsmeding> makes sense though
2020-11-26 20:47:23 → Franciman joins (~francesco@host-82-54-193-143.retail.telecomitalia.it)
2020-11-26 20:47:23 <ski> oh and `sequence'&`accumulate' in place of `sequence_',`sequence'
2020-11-26 20:48:01 → nullheroes joins (~danielvu@168.235.66.22)
2020-11-26 20:48:39 <ski> (i remember noting that in Winstanley's monad tutorial <http://www-users.mat.uni.torun.pl/~fly/materialy/fp/haskell-doc/Monads.html>)
2020-11-26 20:49:25 × jonatanb quits (~jonatanb@83.24.220.252.ipv4.supernova.orange.pl) (Ping timeout: 264 seconds)
2020-11-26 20:49:30 <dminuoso> 21:45:45 ski | tomsmeding : <http://www.ki.informatik.uni-frankfurt.de/doc/html/Haskell1.4/standard-prelude.html#$tFunctor>
2020-11-26 20:49:49 <dminuoso> Academia is one of the few places that knows how to maintain long lived websites, which I think is both a blessing and a curse.
2020-11-26 20:50:28 <ski> shapr : are you sure ?
2020-11-26 20:50:38 ski can't recall
2020-11-26 20:50:54 × AlterEgo- quits (~ladew@124-198-158-163.dynamic.caiway.nl) (Quit: Leaving)
2020-11-26 20:51:24 <monochrom> dminuoso, I think it's more like "is enabled to"
2020-11-26 20:51:56 <ski> shapr : you said anniversary's in April ?
2020-11-26 20:52:03 <shapr> yup
2020-11-26 20:52:05 <int-e> dminuoso: don't worry, we're working on solutions for that anomaly: https://www.scottaaronson.com/blog/?p=5094
2020-11-26 20:52:16 <shapr> April 30th
2020-11-26 20:52:27 × cosimone quits (~cosimone@2001:b07:ae5:db26:d849:743b:370b:b3cd) (Remote host closed the connection)
2020-11-26 20:52:27 → royal_screwup21 joins (52254809@gateway/web/cgi-irc/kiwiirc.com/ip.82.37.72.9)
2020-11-26 20:52:30 <int-e> also... it often happens that a bunch of stuff just disappears when a professor retires or moves to another university
2020-11-26 20:52:36 <ski> yes
2020-11-26 20:52:42 <shapr> int-e: that part makes me sad
2020-11-26 20:52:45 × jespada quits (~jespada@90.254.245.49) (Ping timeout: 240 seconds)
2020-11-26 20:52:54 <shapr> I still have an ancient smalltalk <-> haskell bridge
2020-11-26 20:53:07 <ski> or when the department decide to do a "site revamp"
←Prev  Next→
Page 1 .. 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 .. 5022

All times are in UTC.