Skip to main content
51,839 questions
Newest Active Bountied Unanswered

Question list filters

Filter by
Sorted by
Tagged with
Score of 1
1 answer
157 views

I've tried with the vim-ghcid-quickfix plugin for running Haskell from within Vim, even if looks a bit unmaintained, given last commit is 6 years old. I have installed ghcid¹, and it's on the path. ...
Score of 0
1 answer
93 views

If I enter [ x | y <- [1..3], let x = (1, y) ] in ghci, in the sense of typing it and the pressing Enter, I have to hit Enter again to get it evaluated, as the first Enter seems to start a multi-...
Score of 1
2 answers
110 views

Suppose that two values are being queried with lazy IO, and now they are passed to a pure function f. Suppose also, that IO action, which queries them, requires waiting for external resource. I ask if ...
Score of 1
1 answer
131 views

The Data.List implementation of permutations is productive on infinite lists, but when you call it with a finite list, the result is not lexicographic ordered - in case you passed a sorted list to the ...
Score of 3
1 answer
137 views

As a simple example, consider sortBy :: (a -> a -> Ordering) -> [a] -> [a]. Assume that I'm in a scenario where the as are not a total-order, and that when any two entries of the input [a] ...
Score of 0
0 answers
231 views

Why doesn't this work, and how can I fix it? I'm confused.. TestWithLog.hs:11:27: error: [GHC-39999] • Ambiguous type variable ‘msg0’ arising from a use of ‘withLog’ prevents the constraint ...
Score of 0
0 answers
89 views

So im messing around with the haskell bindings to OpenGL and GLFW inside NIXOS for WSL2. I have a very simple program right here that simply initializes GLFW and a window, runs getChar, and then quits ...
Score of 0
1 answer
148 views

Definitions of 'rigid' tyvar have varied a bit over time. The critical requirement is the tyvar appears in a user-supplied signature: Instead of “user-specified type”, we use the briefer term rigid ...
Score of 0
1 answer
168 views

I want to use nix to haskell development. I want to use haskell ghc version - 9.14.1 and haskell-language-server. Here is my toolchain settings - { "haskell.toolchain" : { "hls&...
Score of 0
1 answer
159 views

In other words, methods are not "looked up" at runtime but are simply passed as higher-order functions. Quote from A Gentle Introduction to Haskell Learning Haskell coming from Rust, to me ...
Score of 3
2 answers
120 views

The project on working on has a dependency in bitbucket. I've specified it as a dependency in the .cabal file, and it's location in the stack.yaml file. The dependency package has an executable that-...
Score of 0
2 answers
142 views

I am trying to install cuda package via: cabal install cuda-0.12.8.0 and I get following error: $ cabal install cuda-0.12.8.0 Resolving dependencies... Build profile: -w ghc-9.6.7 -O1 In order, the ...
Score of 0
2 answers
175 views

Let's suppose we have; fun :: Writer Log a which produces a and Log is a type of log which is accumulated throughout the computation. I want this logging to be optional. class Monoid w => Loggable ...
Score of 0
0 answers
85 views

I'm using latest VSCode with Haskell extension. There's a trivial (?) problem of toolchain (GHC, HLS, stack, cabal) being mismatched depending on what process is used to start VSCode (Debian + KDE ...
Score of 1
1 answer
130 views

Code: module Main where main :: IO () main = topLevel topLevel = putStrLn $ "Hello World!" ++ (show 3) Generally on the internet they write that when you want to convert Integer to String ...

15 30 50 per page
1
2 3 4 5
…
3456