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2020-11-21 00:10:06 <texasmynsted> I can get the tasty options to be honored at compile-time but not at run time. I do not know where the runtime they describe exists.
2020-11-21 00:10:19 <texasmynsted> I can only execute the Tasty tests via "cabal test"
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2020-11-21 00:29:36 <jcd> How do you loop over a list of IO actions?
2020-11-21 00:30:36 <monochrom> the same way I loop over a list.
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2020-11-21 00:36:24 <sm[m]> texasmynsted: have a look at cabal test --help, there is --test-option[s]
2020-11-21 00:36:55 <sm[m]> or you can probably run the test executable directly with something like cabal exec -- NAMEOFTESTEXE ...
2020-11-21 00:39:40 <sm[m]> incidentally, you can also build your test suite into your main app: https://github.com/simonmichael/hledger/blob/master/hledger/Hledger/Cli/Commands.hs#L270
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2020-11-21 00:42:36 <minimario> tooling question: anyone come across the issue where "quick fix" on vscode loops and never fixes anything
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2020-11-21 00:55:54 <jcd>
2020-11-21 00:55:54 <jcd> I have an list of IO-contexted values, '[IO a]'. I have a function that removes a context 'B'. According to the documentation, I should be able to use the context-removing function on the list, but I can't. The IO context remains intact. Is there a special function/method/technique that I'm not using?
2020-11-21 00:57:05 <glguy> jcd: You can't "remove" IO, you can only sequence IO actions together to make more interesting IO actions
2020-11-21 00:57:23 <glguy> I don't know what context 'B' is though
2020-11-21 00:58:40 <Ariakenom> " the documentation" "the context-removing function"
2020-11-21 00:58:45 <Ariakenom> what are these?
2020-11-21 00:58:51 <jcd> https://paste.tomsmeding.com/k8d1Va08
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2020-11-21 00:59:33 <jcd> The library I'm using is Network.HTTP.Client.
2020-11-21 00:59:48 <glguy> jcd: let responses = map (get_response manager) search_urls -- becomes -- responses <- mapM (get_response manager) search_urls
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2020-11-21 01:00:10 <monochrom> You should be looking into mapM_ or mapM, instead of map.
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2020-11-21 01:00:47 <Ariakenom> you can use ghci to do things interactively
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2020-11-21 01:02:06 <Sose> is Data.List.intersect really slow on long lists? any alternatives? I have two lists that are both around 150k elements and I'm trying to find the intersections :D
2020-11-21 01:03:08 <monochrom> Or even better, write your own recursion, so you understand why map doesn't cut it.
2020-11-21 01:03:30 <glguy> Sose: it's checking elements together pairwise, so yes it'll be quite slow for anything more than a handful of elements
2020-11-21 01:03:42 <glguy> Sose: to do better you'll need something like Data.Set
2020-11-21 01:03:58 <monochrom> intersect is quadratic time
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2020-11-21 01:04:28 <glguy> or to sort the lists and write a function that takes advantage of the fact that the lists are sorted to do it in one pass through the two lists
2020-11-21 01:04:28 <Sose> alright, I'll look into Data.Set
2020-11-21 01:04:33 <monochrom> My list is below two hundread, it's fast enough for me.
2020-11-21 01:05:30 <jcd> I see! mapM is under 'Basic Monad functions'. Ouch haha. Okay thank you!
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2020-11-21 01:19:22 <Sose> okay, just doing a dumb fromList, intersection and toList with Set takes the time required from minutes to seconds.. thanks again
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2020-11-21 01:27:52 <fubu> Hello!
2020-11-21 01:28:13 <fubu> Why doesn't this function work?
2020-11-21 01:28:14 <fubu> fibs2 = 1 : 1 : (head $ zipWith (+) fibs2 (tail fibs2))
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