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Logs: liberachat/#haskell

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2021-08-14 22:47:53 stevenxl If I use a type whole it says I need a function from `() -> a0`, which is not too helpful. ;)
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2021-08-14 22:53:11 <Heisen> Hello why can't I curry the foldl function? I tried to do sumWithFoldl = foldl (+) 0 to give me back a partially applied function but it gives me a bunch of error messages.
2021-08-14 22:53:53 <stevenxl> @dminuoso this seems to work as well:
2021-08-14 22:53:53 <lambdabot> Unknown command, try @list
2021-08-14 22:53:59 <stevenxl> https://www.irccloud.com/pastebin/VEK0GYE4/
2021-08-14 22:54:26 stevenxl With the previous definitions of `funcTwo`.
2021-08-14 22:54:33 stevenxl I think this is good enough. :-)
2021-08-14 22:55:13 stevenxl I was using `mapReader` instead of `mapReaderT` which is why I originally thought it could not be done.
2021-08-14 22:58:45 <geekosaur> Heisen, that looks like it might be the monomorphism restriction
2021-08-14 22:59:15 <geekosaur> that said, you'll have to supply the error messages to be certain
2021-08-14 22:59:19 <geekosaur> @where paste
2021-08-14 22:59:19 <lambdabot> Help us help you: please paste full code, input and/or output at e.g. https://paste.tomsmeding.com
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2021-08-14 23:06:45 <aarchi> Is there documentation on the default `localeEncoding` for each platform?
2021-08-14 23:07:31 <geekosaur> the default is not under the control of ghc
2021-08-14 23:08:09 <aarchi> Is it set via `LC_ALL=C` and friends?
2021-08-14 23:08:30 <geekosaur> but for example on most nmodern linux distributions it's some utf8-based locale
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2021-08-14 23:08:51 <geekosaur> usually set duringf os installation
2021-08-14 23:09:19 <aarchi> Is Windows UTF-16?
2021-08-14 23:10:02 <geekosaur> I believe it is with the new I/O manager in ghc9. don't know about earlier versions
2021-08-14 23:11:40 <monochrom> On Linux it is the LANG and LC_* environment variables. On Windows it is code page. I don't know Mac. The question becomes "where are all these officially written?"
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2021-08-14 23:18:01 <aarchi> Has Haskell always used floored division for `div` and `mod`?
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2021-08-14 23:27:20 <aarchi> Looks like Haskell used to support exponential notation, e.g. `1e6` in `read`
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2021-08-14 23:34:49 <aarchi> monochrom: by “code page” do you mean a code page Window-1252?
2021-08-14 23:35:04 <aarchi> *a code page like Windows-1252
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2021-08-14 23:42:12 <monochrom> yes
2021-08-14 23:42:18 <geekosaur> yes, and it can go wrong in a numbver of ways so it's disrecommended
2021-08-14 23:42:28 <geekosaur> which is another reason for the new I/O manager
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2021-08-14 23:43:57 <monochrom> div and mod are painstakingly determinized in the Haskell Report.
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2021-08-15 00:44:55 <aarchi> Thanks everyone. This has been very helpful
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2021-08-15 01:10:22 <aegon> haskell cant overload functions with the same name and parameter types, is there a way to specialize a function for specific parameters?
2021-08-15 01:10:31 <aegon> *afaik
2021-08-15 01:11:33 <aegon> I'm trying to understand how postgresql-simple manages to have 2 query functions that behave different but take the same arguments, one has a special constraint on one of the outputs but aside from that they seem the same, i thought the compiler complained about that though
2021-08-15 01:11:44 <aegon> also, i'm being derpy, i can try this is ghci quick, nevermind
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2021-08-15 01:14:05 <aegon> hmm, yeah it complains
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2021-08-15 01:16:40 <aegon> aand its not overloaded in the lib, i'm done for the day
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