Haskell is a functional programming language.
Haskell is a functional programming language with non-strict semantics. Haskell's first version was released in 1990.
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Questions tagged [haskell]
35 questions
9
votes
1 answer
cabal dies on NixOS in KVM
I set up a NixOS system on KVM and installed the haskelPlatform package.
Everything works fine, ghci works fine, but cabal dies without any helpful error message:
[michas@nix:~]$ type -a cabal
cabal is…
michas
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9
votes
3 answers
Nix: Skipping unit tests when installing a Haskell package
I'm using Nix to install packages under my home (so no binary packages) on a shared host with limited resources. I'm trying to install git-annex. When building one of its dependencies, haskell-lens, the unit tests consume so much memory that they…
Miikka
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7
votes
1 answer
Configure xmobar to show workspaces
What should my xmonad.hs file look like to correctly give workspace info to xmobar?
user66261
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- 2
6
votes
2 answers
Pretty output in GHCI: no colours shown
Using this method to get a pretty GHCI colours, I am not getting any colours whatsoever. However, my terminal is a urxvt with 256 colours enabled and TERM is xterm-256color. Any idea what I could have missed?
My ~/.ghci reads:
import qualified…
Sardathrion - against SE abuse
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6
votes
1 answer
How do I enable a three column layout in XMonad?
I'm a Haskell and XMonad beginner. I'm trying to set up my tiling layout to allow three side by side columns (so that I can have three simultaneous tall and thin Vim instances for coding, per workspace).
In the docs, I've found a three-column layout…
ire_and_curses
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6
votes
2 answers
Where are installed the files of a .deb package with dpkg / apt-get?
My OS is Ubuntu 14.04.
I have done: sudo apt-get install haskell-platform-doc
But I cannot find the corresponding documentation files.
Where could I find them ? Or is there a command to launch so as to find where the .deb package has put them in my…
Stephane Rolland
- 4,147
- 6
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5
votes
2 answers
How can I override a broken Haskell package in nix?
I use NixOS, and I'm trying to set up a Nix Haskell environment for my Haskell project. I have this Haskell package written in Nix that I'm trying to get working via nix-shell, but the dependent Haskell package Clay won't build, as described in this…
Jonathan
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5
votes
1 answer
XMonad gaps in fullscreen
I am trying to set up XMonad so that multiple windows have gaps between them. The relevant part of my config file is as follows
import XMonad.Layout.Spacing
followed later by
myLayout = tiled ||| Mirror tiled ||| Full
where
tiled = spacing 5…
Brian Fitzpatrick
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3
votes
0 answers
Minimizing disk usage with parallel calls to GCC
I am experimenting with testing GCC in parallel. My setup will run 96 tests before giving me the test report.
If I run these tests sequentially it will invoke GCC once, run the executable, gather diagnostics and then repeat. However, when I try to…
Rewbert
- 131
- 3
3
votes
1 answer
In NixOS, is there any way to create a package that has pandoc, pandoc-citeproc, and pandoc-crossref?
I'm very new to NixOS. I use Pandoc a lot, often with pandoc-citeproc, but I can't find a NixOS package for pandoc-citeproc. I see that there's a Haskell library for pandoc-citeproc in HaskellPackages. How can I combine a Pandoc binary which is…
Jonathan
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3
votes
1 answer
Dragging and resizing floating windows in xmonad without the modkey
In my .xmonad/xmonad.hs file, I have the following lines, which control howto drag and resize windows. How can I change this, such that I don't need any mod key?
myMouseBindings (XConfig {XMonad.modMask = modm}) = M.fromList $
-- mod-button1,…
student
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3
votes
1 answer
Getting xmonad to show name of current workspace in xmobar
New to xmonad/xmobar/haskell, trying to get the name of the current workspace to show up in xmobar. So far I have this xmonad.hs:
module Main where
import XMonad
import XMonad.Hooks.SetWMName
import XMonad.Hooks.DynamicLog
import…
mitchus
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3
votes
0 answers
How to use a package revision not yet in the published nixpkgs (but described in the development branches of nixpkgs)?
I'd like to use the new release of ghc (7.10, because of a new feature -- static ptr), and I'm using a single-user nix environment.
I don't find the wanted new release in the published lists at https://nixos.org/nixos/packages.html; e.g., the latest…
imz -- Ivan Zakharyaschev
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2
votes
1 answer
Renaming workspaces interactively using DynamicWorkspaces does not work
I have been trying to find a way to rename workspaces while working. I'm currently using up to 4 workspaces at the time and I would like to assign the workspaces new names as needed.
I came across XMonad.Actions.DynamicWorkspaces, and I am able to…
user89423
- 21
- 1
2
votes
0 answers
Keep same width of middle column in ThreeColMid layout in xmonad
For my large screen I want to have one window in the middle of the screen and the other (slave) windows on the side of it, like in https://hackage.haskell.org/package/xmonad-contrib-0.13/docs/XMonad-Layout-ThreeColumns.html#g:1.
If I have >= 3…
student
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