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2020-10-22 22:47:13 → poljar1 joins (~poljar@93-143-177-96.adsl.net.t-com.hr)
2020-10-22 22:47:54 <hekkaidekapus> fraktor: It is probably not a good idea to roll your own float parser. Background:
2020-10-22 22:48:03 <int-e> Guest18: I'm vaguely aware that such sites exist. Does tio.run do Haskell?
2020-10-22 22:48:08 × Tario quits (~Tario@201.192.165.173) (Ping timeout: 272 seconds)
2020-10-22 22:48:10 <hekkaidekapus> @where floating-point -- fraktor
2020-10-22 22:48:10 <lambdabot> "What Every Programmer Should Know About Floating-Point Arithmetic" at <http://floating-point-gui.de/> and "What Every Computer Scientist Should Know About Floating-Point Arithmetic" by David
2020-10-22 22:48:10 <lambdabot> Goldberg in 1991 at <http://docs.sun.com/source/806-3568/ncg_goldberg.html> and <http://citeseer.ist.psu.edu/viewdoc/summary?doi=10.1.1.102.244>
2020-10-22 22:48:42 <hekkaidekapus> fraktor: But you could try <https://hackage.haskell.org/package/megaparsec-9.0.0/docs/Text-Megaparsec-Char-Lexer.html#v:float>
2020-10-22 22:49:24 × poljar quits (~poljar@93-139-70-179.adsl.net.t-com.hr) (Ping timeout: 265 seconds)
2020-10-22 22:49:28 → Tario joins (~Tario@201.192.165.173)
2020-10-22 22:50:18 <Guest18> int-e: it does
2020-10-22 22:50:30 <Guest18> I hope it handles IO better than repl.it
2020-10-22 22:50:32 <Guest18> thank you
2020-10-22 22:51:26 × wroathe quits (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 256 seconds)
2020-10-22 22:51:53 <fraktor> hekkaidekapus: So what I'm doing is using Parsec to determine which characters are part of the float and then `read`, so it's still pretty straightforward.
2020-10-22 22:52:18 → olligobber joins (olligobber@gateway/vpn/privateinternetaccess/olligobber)
2020-10-22 22:52:40 <Guest18> Another question: if i have two ints, and wanted to divide them (not div, but /) why won't haskell let me?
2020-10-22 22:52:51 <Guest18> If you need more context
2020-10-22 22:53:28 <Guest18> I have a function that counts how many letters are different in two given strings. For example "hello" and "hellq" would be 1
2020-10-22 22:53:57 <Guest18> And I use genericLength to get the length of those strings
2020-10-22 22:54:10 <Guest18> But for some reason it won't let me divide them
2020-10-22 22:54:24 <int-e> :t genericLength
2020-10-22 22:54:25 <lambdabot> Num i => [a] -> i
2020-10-22 22:54:35 → denisse joins (~spaceCat@gateway/tor-sasl/alephzer0)
2020-10-22 22:55:05 × amagi_ quits (~amagi@113.101.23.223) (Ping timeout: 240 seconds)
2020-10-22 22:55:20 → jedws joins (~jedws@101.184.148.229)
2020-10-22 22:56:04 <Guest18> Ok, so the typeclass is Num, and so if i make the first function also return a num, it should work?
2020-10-22 22:56:16 <bliminse> Guest18: to divide 2 ints with / call fromIntegral on each of them
2020-10-22 22:56:32 <hekkaidekapus> fraktor: I don’t understand well what you’re trying to do. Do you want to extract sub-strings that could be converted to floats?
2020-10-22 22:56:42 → texasmynsted joins (~texasmyns@104.140.52.115)
2020-10-22 22:57:00 <int-e> Something doesn't add up. Anyway, the usual conversion functions are: fromIntegral, realToFrac, and floor/round/ceiling to get back to integers.
2020-10-22 22:57:18 → amagi joins (~amagi@113.101.23.223)
2020-10-22 22:57:21 → texasmyn_ joins (~texasmyns@104.140.52.115)
2020-10-22 22:57:33 <Guest18> Actually, it worked just by putting the Num constraint on the first functrion
2020-10-22 22:58:40 → tromp joins (~tromp@dhcp-077-249-230-040.chello.nl)
2020-10-22 22:58:42 × texasmyn_ quits (~texasmyns@104.140.52.115) (Client Quit)
2020-10-22 22:58:45 → rotaerk joins (rotaerk@2600:3c02::f03c:91ff:fe70:4a45)
2020-10-22 22:58:55 <Guest18> https://pastebin.pl/view/7e4a65f8
2020-10-22 22:58:58 <Guest18> For reference
2020-10-22 22:59:02 → texasmyn_ joins (~texasmyns@104.140.52.115)
2020-10-22 22:59:45 <Guest18> It should calculate the percentage to which the second string is like the first
2020-10-22 23:00:00 → wroathe joins (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net)
2020-10-22 23:00:04 <Guest18> It takes a key string, and several other strings
2020-10-22 23:00:07 × texasmynsted quits (~texasmyns@104.140.52.115) (Read error: Connection reset by peer)
2020-10-22 23:00:26 <Guest18> For every one, if the percentage is bigger than 0.9, it prints pass otherwise fail
2020-10-22 23:00:49 × mbomba quits (~mbomba@142.114.9.241) (Quit: WeeChat 2.9)
2020-10-22 23:00:59 × conal quits (~conal@66.115.157.144) (Quit: Computer has gone to sleep.)
2020-10-22 23:01:16 <Guest18> Wait, that's not the right code
2020-10-22 23:01:38 <Guest18> https://pastebin.pl/view/49dd7475
2020-10-22 23:01:45 <Guest18> This is the working version
2020-10-22 23:01:53 × texasmyn_ quits (~texasmyns@104.140.52.115) (Client Quit)
2020-10-22 23:02:24 <Guest18> The key and the other strings are guaranteed to be of the same length
2020-10-22 23:02:56 → conal joins (~conal@66.115.157.144)
2020-10-22 23:03:13 <Guest18> I know I could have done better, maybe do the nums function with a fold or something, but i had a few minutes to do this
2020-10-22 23:03:20 × seanvert quits (~user@177.84.244.242) (Ping timeout: 256 seconds)
2020-10-22 23:03:24 × tromp quits (~tromp@dhcp-077-249-230-040.chello.nl) (Ping timeout: 256 seconds)
2020-10-22 23:04:30 <Guest18> Suggestions?
2020-10-22 23:05:06 × wroathe quits (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net) (Ping timeout: 256 seconds)
2020-10-22 23:05:07 × vk3wtf quits (~doc@14-202-30-62.static.tpgi.com.au) (Quit: WeeChat 2.7.1)
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2020-10-22 23:10:53 × jiribenes quits (~jiribenes@rosa.jiribenes.com) (Remote host closed the connection)
2020-10-22 23:11:11 → geowiesnot joins (~user@87-89-181-157.abo.bbox.fr)
2020-10-22 23:12:25 <Guest18> num key sub = foldr (\(x,y) b -> if x == y then b+1 else b) 0 $ zip key sub -- i reckon this is better
2020-10-22 23:12:51 × heatsink quits (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Remote host closed the connection)
2020-10-22 23:13:02 × xff0x quits (~fox@2001:1a81:52d2:ca00:522a:154a:cc26:5e43) (Ping timeout: 260 seconds)
2020-10-22 23:13:14 × dansho quits (~dansho@ip68-108-167-185.lv.lv.cox.net) (Remote host closed the connection)
2020-10-22 23:13:37 → xff0x joins (~fox@2001:1a81:52d2:ca00:c409:1d88:453d:35d6)
2020-10-22 23:13:39 → dansho joins (~dansho@ip68-108-167-185.lv.lv.cox.net)
2020-10-22 23:15:16 × elfets quits (~elfets@ip-37-201-23-96.hsi13.unitymediagroup.de) (Quit: Leaving)
2020-10-22 23:15:46 × dqd quits (id@wikipedia/dqd) (Ping timeout: 246 seconds)
2020-10-22 23:15:49 × StoneToad quits (~StoneToad@199-167-119-164.ppp.storm.ca) (Ping timeout: 264 seconds)
2020-10-22 23:16:15 → StoneToad_ joins (~StoneToad@199-167-119-164.ppp.storm.ca)
2020-10-22 23:16:18 <Guest18> Really, any suggestions whatsoever are welcome
2020-10-22 23:17:01 <hekkaidekapus> fraktor: I’m going away. In the meantime, here is something to chew on. Your bespoke parser would recognise "+45.6". Now try Text.Megaparsec.Char.Lexer.float with that to see what you get. Also:
2020-10-22 23:17:18 <hekkaidekapus> > isIEE 45.6 -- fraktor
2020-10-22 23:17:20 <lambdabot> error:
2020-10-22 23:17:20 <lambdabot> • Variable not in scope: isIEE :: t0 -> t
2020-10-22 23:17:20 <lambdabot> • Perhaps you meant ‘isIEEE’ (imported from Prelude)
2020-10-22 23:17:35 <hekkaidekapus> > isIEEE 45.6 -- fraktor
2020-10-22 23:17:37 <lambdabot> True
2020-10-22 23:17:43 <hekkaidekapus> > isIEEE +45.6 -- fraktor
2020-10-22 23:17:45 <lambdabot> error:
2020-10-22 23:17:45 <lambdabot> • No instance for (Fractional (Double -> Bool))
2020-10-22 23:17:45 <lambdabot> arising from a use of ‘e_1456’
2020-10-22 23:19:43 → heatsink joins (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net)
2020-10-22 23:20:15 <int-e> :t isIEEE
2020-10-22 23:20:17 <lambdabot> RealFloat a => a -> Bool
2020-10-22 23:22:43 × conal quits (~conal@66.115.157.144) (Quit: Computer has gone to sleep.)
2020-10-22 23:24:00 → dqd joins (id@wikipedia/dqd)
2020-10-22 23:24:35 → conal joins (~conal@66.115.157.144)
2020-10-22 23:25:30 × merijn quits (~merijn@83-160-49-249.ip.xs4all.nl) (Ping timeout: 272 seconds)
2020-10-22 23:26:47 × nbloomf quits (~nbloomf@2600:1700:ad14:3020:ccf3:9e4f:a615:179a) (Quit: My MacBook has gone to sleep. ZZZzzz…)
2020-10-22 23:28:37 → invaser joins (~Thunderbi@31.148.23.125)
2020-10-22 23:29:28 × conal quits (~conal@66.115.157.144) (Client Quit)
2020-10-22 23:30:14 × christo quits (~chris@81.96.113.213) (Remote host closed the connection)
2020-10-22 23:31:38 → texasmynsted joins (~texasmyns@104.140.52.115)
2020-10-22 23:32:22 × fraktor quits (~walt@129.93.191.18) (Quit: WeeChat 2.8)
2020-10-22 23:33:56 × falafel quits (~falafel@71-34-132-121.clsp.qwest.net) (Ping timeout: 256 seconds)
2020-10-22 23:34:02 × ensyde quits (~ensyde@2600:1702:2e30:1a40:693a:f19:42e4:5751) (Ping timeout: 260 seconds)
2020-10-22 23:35:39 → wroathe joins (~wroathe@c-68-54-25-135.hsd1.mn.comcast.net)
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