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2020-10-03 06:42:18 × jle` quits (~mstksg@unaffiliated/mstksg) (Ping timeout: 256 seconds)
2020-10-03 06:42:20 <p0a> Because I have a Database -> [String] function applied to my db. Uh, sorry everyone I'm just confused.
2020-10-03 06:42:53 <c_wraith> what do you want to do if it's Nothing?
2020-10-03 06:43:25 × heatsink quits (~heatsink@107-136-5-69.lightspeed.sntcca.sbcglobal.net) (Ping timeout: 256 seconds)
2020-10-03 06:43:29 <ski> <p0a> propagate the failure
2020-10-03 06:44:18 <p0a> I like that (1+) <$> Nothing == Nothing, so that's the kind of thing I want
2020-10-03 06:44:25 × Stanley|00 quits (~stanley00@unaffiliated/stanley00) ()
2020-10-03 06:44:31 <ski> .. but at some point, you're going to have to handle the possible `Nothing', in some way (perhaps just by throwing away a `Maybe ()' result ..)
2020-10-03 06:46:02 × HaskellYogi quits (~vivekrama@49.207.196.239) (Remote host closed the connection)
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2020-10-03 06:46:53 <p0a> i.e. I wnat something like (putStrLn . show) <$> (Just 1)
2020-10-03 06:46:58 <p0a> but as is it won't work
2020-10-03 06:47:15 <p0a> I think MaybeT might be what I need
2020-10-03 06:47:16 <c_wraith> what do you want to *happen* if it's Nothing?
2020-10-03 06:47:37 <taurux> p0a: It does not work because it has type (Maybe (IO ()))
2020-10-03 06:47:50 <p0a> c_wraith: no print
2020-10-03 06:47:55 × zaquest quits (~notzaques@5.128.210.178) (Quit: Leaving)
2020-10-03 06:48:05 <c_wraith> do you care to communicate the information to a higher level?
2020-10-03 06:48:10 <c_wraith> err, communicate the failure
2020-10-03 06:48:16 <p0a> no because this is version alpha of the thing I'm doing
2020-10-03 06:48:27 <p0a> I was planning to move to RIO after I get something down and do things more properly
2020-10-03 06:48:30 <taurux> if you use MaybeT you can directly bind it in an action in do-notation, and perform the related IO action. If it is nothing, the whole function will return Nothing (wrapped in MaybeT)
2020-10-03 06:48:30 × falafel quits (~falafel@2605:e000:1527:d491:a806:37fa:6971:2798) (Remote host closed the connection)
2020-10-03 06:48:33 → todda7 joins (~torstein@athedsl-4367507.home.otenet.gr)
2020-10-03 06:48:38 <c_wraith> traverse_ or mapM_ work with Maybe, too
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2020-10-03 06:48:53 <c_wraith> so you could do something like mapM_ (mapM_ putStrLn)
2020-10-03 06:48:59 <p0a> ah two mapM_'s
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2020-10-03 06:49:18 <p0a> nice. I did notice that mapM_ worked with Maybe which is why my code was working in the first place (but putStrLn . show was applied to [String] ...)
2020-10-03 06:49:24 <p0a> of course! thanks
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2020-10-03 07:04:28 <p0a> Hey all, here's my code, feel free to criticize: https://paste.tomsmeding.com/hu7SEMVu
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2020-10-03 07:05:15 × fiQ2 quits (~fiQ@mirkk.ninja) (Ping timeout: 244 seconds)
2020-10-03 07:05:27 × bitmapper quits (uid464869@gateway/web/irccloud.com/x-tarhbdjsvwboswmi) (Quit: Connection closed for inactivity)
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2020-10-03 07:05:58 <p0a> The comment at the beginning of Main.hs explains the purpose of the program. I plan to rewrite it. I want to include proper strings (instead of String), exceptions for file handling, prettier printing and some other functionality to my database (like deleting records), as well as using an actual database instead of relying on the haskell Read
2020-10-03 07:06:24 → jle` joins (~mstksg@cpe-23-240-75-236.socal.res.rr.com)
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2020-10-03 07:07:04 <zeta_0> hello there, has anyone here used the haskell package miso ? my issue has to do with nix configuration.
2020-10-03 07:07:26 <p0a> a better "search" function would be nice, the one I currently have is a bit lame. Is there a google-esque String -> String -> Double function available? (Double representing the score of x being searched in y)
2020-10-03 07:07:54 <p0a> The only thing I'm aware of is Levenshtein distance which is not exactly what I'm describing but would do
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2020-10-03 07:11:51 <tomsmeding> p0a ah nice idea
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2020-10-03 07:12:56 × jle` quits (~mstksg@unaffiliated/mstksg) (Ping timeout: 258 seconds)
2020-10-03 07:13:47 <p0a> yeah :) I think it'd be nice
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2020-10-03 07:13:56 × zeta_0 quits (~zeta@h78.22.19.98.dynamic.ip.windstream.net) (Quit: rcirc on GNU Emacs 26.3)
2020-10-03 07:14:08 <p0a> tomsmeding: btw in my latest paste https://paste.tomsmeding.com/hu7SEMVu there is no colors
2020-10-03 07:14:23 <p0a> Did I break it by having lines that are too long?
2020-10-03 07:14:35 <taurux> i see colors just fine in your paste
2020-10-03 07:14:36 <p0a> oh nevermind I toggled highlighting
2020-10-03 07:15:03 p0a is in a permanent state of confusion
2020-10-03 07:15:18 <ski> (mapM_ . mapM_) (putStrLn . if optPathOnly opts then path else show) . fmap (queryStrings nonOptions) =<< readDatabase (optDatabase opts)
2020-10-03 07:15:41 <p0a> ah thank you ski let me think about that
2020-10-03 07:16:06 × howdoi quits (uid224@gateway/web/irccloud.com/x-modyeizvecmfjtqb) (Ping timeout: 244 seconds)
2020-10-03 07:16:11 <ski> not sure whether you want to elide naming `db', but you can do it
2020-10-03 07:16:13 <p0a> kinda intense to be honest
2020-10-03 07:16:31 <p0a> Like, it's cool that you can write and understand that
2020-10-03 07:16:41 <p0a> but I think it places an unnecessary barrier to those of us who can't :P
2020-10-03 07:16:55 <p0a> or am I being naive? idk
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2020-10-03 07:17:30 × chappi quits (~swaroop@157.49.68.100) (Remote host closed the connection)
2020-10-03 07:18:39 <p0a> okay so =<< allows us to ignore the do binding, then you fmap over the Maybe, followed by a double mapM_ to get inside Maybe and List
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