Recent questions tagged haskell

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haskell - How can undecidable instances actually hang the compiler?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.2k views

haskell - Parse error on input 'if' when trying to use a condition inside a do block

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 994 views

haskell - Using Leksah debugger with programs that use readLn and similar

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - What was wrong with Control.MonadPlus.Free?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 822 views

haskell - combining StateT with InputT

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - How to define function only for old versions in GHC?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - Tuple and function composition

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - How to take an array slice with Repa over a range

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 998 views

haskell - Proofs' role in Coq extractions

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - Compiling to GHC Core

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 937 views

haskell - Simulate global variable

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - Why do Maybe/Optional types use a Just/Some type instead of the actual type?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

haskell - How can I use contradictory evidence?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.2k views

haskell - XMonad spawn programs on startup in specified workspace

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

haskell - Why does importing Control.Applicative allow this bad code to type check?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 946 views

haskell - determining function behavior from the type of the function

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 879 views

haskell - Unifying c -> a -> b and (a -> b) -> c

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

haskell - Checking for a particular data constructor

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 870 views

haskell - Combining lenses

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 2.0k views

haskell - Couldn't match expected type `Text' with actual type `[Char]'

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - How to [temporarily] suppress "defined but not used" warnings?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.2k views

haskell - Unit-Testing: Can module re-exports avoid having to "expose" all testable modules

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 890 views

haskell - What would be the "distinct method" that Traversable has in addition to Foldable?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 926 views

haskell - How does GHCi pick names for type variables?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

haskell - Type signature in a where clause

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 916 views

haskell - Type-threaded heterogenous lists and defaulting(?) with type families?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.4k views

haskell - Flatten a list of lists

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 981 views

haskell - How do I use multiple where clauses in GHCi?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 972 views

haskell - Can I magic up type equality from a functional dependency?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.1k views

haskell - How to pick a random list element in a pure function?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 885 views

haskell - IO/Monadic assign operator causing ghci to explode for infinite list

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 984 views

haskell regex substitution

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 889 views

haskell - Understanding a rank 2 type alias with a class constraint

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 870 views

haskell - GHC 7.10 generates slower code than older versions

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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1 answer 1.0k views

haskell - How to fix "Illegal datatype context" (use -XDatatypeContexts)?

asked Oct 24, 2021 in Technique[技术] by 深蓝 (71.8m points)

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