All Questions
18 questions
25
votes
2
answers
12k
views
How to install Haskell (Platform or Stack) in 2018 on Linux?
I am trying to learn Haskell from the book Learn You a Haskell by Miran Lipovača. Both the book and haskell.org recommends installing the Haskell Platform but there is no download for Manjaro Linux (...
- 579
5
votes
0
answers
2k
views
cabal version 3.2: unrecognised command: sandbox (try --help)
Following this tutorial http://wiki.haskell.org/How_to_write_a_Haskell_program#Recommended_tools but not able to run cabal sandbox init. I have the latest version of cabal installed on my Mac and ...
- 2,272
4
votes
1
answer
4k
views
Process exited with code: ExitFailure 1" after build project Haskell
After connect to .cabal file some package(for example text) and after build project throw Exception: Process exited with code: ExitFailure 1".
For building project, I'm using haskell-stack, command: ...
- 1,116
4
votes
1
answer
796
views
Undefined symbols for architecture x86_64: "_utimensat", referenced from: _cazW_info in libHSdirectory-1.3.3.0.a(Posix.o)
I'm trying to install haskell-ide-engine. Below are the commands
git clone https://github.com/haskell/haskell-ide-engine --recursive
cd haskell-ide-engine
./install.hs build-all
The last command ./...
- 10.3k
4
votes
1
answer
1k
views
Stack always downloads ghc even though it is in path
I want to use Haskell on my computer currently running Windows 10 build 1803, and I am using a broadband connection of 25 Mbps. As of 2018, the Haskell compiler version known as ghc is 8.4.3.
First ...
- 45
3
votes
2
answers
596
views
Can standalone Haskell Executable run across Machine having the same OS?
NOTE: I am using Stack.
When we do (say on a CentOS machine)
stack install --ghc-options='-optl-static -optl-pthread' --force-dirty --local-bin-path path-to-executable(my-project-exe)
Can the newly ...
- 31
2
votes
2
answers
3k
views
How to get the current UTC time in Haskell?
i want to use system time in my code for having the record of time when the data is captured from the user interface.how to get system time using Haskell.
- 161
2
votes
1
answer
1k
views
Installing and running a haskell package offline
I'm trying to run duckling (https://github.com/facebook/duckling) on a Windows server.
Unfortunately, the server only has intranet access and no internet access. How do I set up Haskell to be able ...
- 268
1
vote
2
answers
110
views
understand haskell logic behind odd's and even's index lists
I had a question in haskell that asks a function to divide a list in two different lists so the even indexs filled a list and the odd ones another.
Example:
func :: [Int] -> ([Int], [Int])
Then, ...
1
vote
1
answer
2k
views
Haskell error - 'parse error on input `->'
I am trying to declare a function in Haskell GHCi as
fact :: Int -> Int
But I am getting this error - error: parse error on input `->'
I do not understand why this is happening. Can anyone ...
- 11
1
vote
1
answer
237
views
When I tried to compile a Haskell file , error:parse error on input '#'
I was learning how to use this SDK from https://github.com/spaceships/garbled-circuits
When I finished downloading the dependencies and tried to compile one example, the error was like parse error on ...
- 11
1
vote
1
answer
260
views
How does haskell-platform use Stack?
The page: https://www.haskell.org/platform/ claims that haskell-platform comes with the Stack tool. However, on my Debian system after installing the haskell-platform package, I do not have the ...
- 4,128
1
vote
3
answers
276
views
A lot of errors during cabal update and finally doesn't work
first of all thanks for the help you can bring me to solve my disaster with cabal xD...
I'm working with OS X El Capitan 10.11.3, 64 bits.
I installed Haskell platform from https://www.haskell.org/...
- 11
1
vote
1
answer
487
views
Failed to build Distribution.Simple package using stack in Haskell
the stack command stack new my-project creates a auto-generated file Setup.hs with contents:
import Distribution.Simple
main = defaultMain
but my vs code intellisense just tells me
Could not load ...
- 43
1
vote
0
answers
170
views
What is wrong with my "token type" in Happy?
I am writing a simple arithmetic expression parser in the Haskell platform's Happy. The Happy tutorial (labeled "Documentation") from the Haskell site implements a similar grammar to what I ...
- 13