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    I'm relatively new to Haskell, and I'm trying to understand one of the definitions of HList. data ... besides avoiding boxing of HCons1? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    This passage, which unfortunately lacks references, about the development of ADTs in Haskell, from A History of Haskell: ... an ADT be useful? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I know only one prover that translates the algorithm that Quine gave for classical propositional logic in his book ... reproduced in this page. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I was experimenting with the singletons library and I found a case that I don't understand. {-# LANGUAGE GADTs, ... .TypeLits.CmpNat a a1)))) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm trying to wrap the Data.Binary.Put monad into another so that later I can ask it questions like "how ... second part to this question here. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I have used writeBS writeText from Snap and renderTemplate from heist but none of them seems to support unicode. ... is just some messy code. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    using cabal; came accross this error. did cabal install and this happened. failed during the building phase. The ... Compilation version: 7.8.4 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I did: cabal update cabal install gtk2hs-buildtools But stuck here: >cabal install gtk Resolving dependencies... [ ... see th updated answer. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Is there a benefit to specifically reserving varied data-type pairings for tuples like such: [(23, "Jordan"), ... code will not work in Haskell See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm having trouble installing the Haskell framework Snap on macOS Sierra. Whenever I install it, I get the following ... deleting my ~/.ghc file See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Everything was working great up until about a month or so ago... Suddenly I'm getting berkson.github.io/ ... io/blob/source/source/blog.hs#L330 See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I've got the following, which type-checks: p_int = liftA read (many (char ' ') *> many1 digit <* many ... no control over the file format!) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm getting an error for this code, and I don't understand where the conflict is. {-# LANGUAGE TypeFamilies, ... 8 Failed, modules loaded: none. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'd like something like the following: constrName :: Data a=> a -> String constrName = showConstr . toConstr But for ... m using base-4.8.1.0. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    As in my previous question, I'm trying to wrap the Data.Binary.Put monad into another monad so that ... Could someone please help further? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am lazily encoding lists using this code (taken from this SO question): import Data.Binary newtype Stream a = ... how I can make it lazy? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm working on this tool where the user can define-and-include in [config files | content text-files | etc] their ... to loop in Haskell" etc..) See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Something that should be easy but somehow I don't find how to do it... let's have the following string: " ... -0987-fe40-61f2-42b0f6fc3e1c"]... See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I would like to embed ReaderT into another monad transformer. How do I do this? The example below uses Scotty but ... (ReaderT Config IO) () See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Learning Haskell, in ghci: Prelude Data.Ratio> :type 0.15 0.15 :: Fractional a => a Prelude Data.Ratio> ... of 0.15 actually different types? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am a new learner of Haskell, my code is as follows: data Num a=>Units a = Units a (SymbolicManip a ) ... to fix it? Anyone can help me? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    data A=A data B=B data AB=A|B Which makes a sum type AB from A and B. but the last line induces ... making sum types for user-defined types? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Trying to use hmatrix, to create a zero marix. For some reason, when I try this on command line, it works: ... } Failed, modules loaded: none. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Being quite new to Haskell, I'm currently trying to improve my skills by writing an interpreter for a simple imperative ... way out of that..? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I am following along with the Learn you a Haskell for great good, I have implemented take': take' :: (Ord i, Num i) => i ... => i -> [a] -> [a] See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm running on a container with 768MB ram and 512 MB swap space. I can't increase either of this. cabal ... have to make do without criterion? See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    Problem: using fold, take from the list elements which are on the even positions: GHCi> evenOnly [1..10] ... something wrong with the syntax. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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    I'm currently writing some pipes-core/attoparsec plumbing for a small project of mine. I want each parser to ... equivalent to the fourth one. See Question&Answers more detail:os...
asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)
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