haskell-beginners-2022/exercises

💻 Exercises for the Haskell Beginners 2022 course

exercises's Issues

Add comments on where to add imports

Turns out that DocTest is not handling imports after "certain statements" (e.g. the line containing $setup in Lecture3.hs) very well. Add some comments in all of the LectureN.hs files on where to "potentially" add imports.

n.b. I will pick this up, this serves mainly as a reminder.

Support GHC 9.2.5

It's now the recommended GHC version according to GHCup and it has some improvements in terms of supporting the OS

So it makes sense to bump the version. I propose to do a soft upgrade:

• Increase the upper base bound to allow GHC 9.2.4
• Build on CI with 9.2.4 (but only GHC 9.2.4)
• Update the instructions
• Keep the old lower bound so people who forked the course earlier could still build it with GHC 8.10.7
• Test locally that it still builds with GHC 8.10.7 just in case

Solutions exercises

Hi @chshersh! After each week, could you provide the solutions to the exercises of the prev week? Or if the solutions are already available could you let me know where I can find them? thx in advance!

Use 'hedgehog-classes' from Hackage

I'm using the hedgehog-classes package from my fork with the required fixes:

exercises/cabal.project

Lines 5 to 8 in 222640b

	source-repository-package
	type: git
	location: https://github.com/chshersh/haskell-hedgehog-classes.git
	tag: 7a46b92ed62cdae73cdca89db28c71a19020c802

However, a new version was released to Hackage recently. I hope it includes my fix. In that case, we could switch to using the library from Hackage.

Add exercises and tests for Lecture 4

Add exercises and tests for Lecture 2

Fix HLint warnings in test/Test/Lecture.hs

Some redundant brackets produce 4 HLint warnings:

https://github.com/haskell-beginners-2022/exercises/security/code-scanning/6

Add gitpod integration

Similar to Learn4Haskell

Write instructions

• Haskell installation instructions
• How to build the project
• How to run tests
• Project structure

Add exercises and tests for Lecture 3

Dependency error while building

I am trying to build and run the tests and I am getting this error:

cabal build --enable-tests --write-ghc-environment-files=always
Cloning into '/Users/test/exercises/dist-newstyle/src/haskell-h_-d6c8996b412612d'...
remote: Enumerating objects: 946, done.
remote: Counting objects: 100% (59/59), done.
remote: Compressing objects: 100% (45/45), done.
remote: Total 946 (delta 25), reused 36 (delta 12), pack-reused 887
Receiving objects: 100% (946/946), 364.59 KiB | 1.51 MiB/s, done.
Resolving deltas: 100% (534/534), done.
HEAD is now at 7a46b92 Make modules empty when aeson, primitive flags are disabled
Resolving dependencies...
cabal: Could not resolve dependencies:
[__0] trying: exercises-0.0.0.0 (user goal)
[__1] next goal: base (dependency of exercises)
[__1] rejecting: base-4.16.3.0/installed-4.16.3.0 (conflict: exercises =>
base^>=4.14)
[__1] skipping: base-4.17.0.0, base-4.16.3.0, base-4.16.2.0, base-4.16.1.0,
base-4.16.0.0, base-4.15.1.0, base-4.15.0.0 (has the same characteristics that
caused the previous version to fail: excluded by constraint '^>=4.14' from
'exercises')
[__1] rejecting: base-4.14.3.0, base-4.14.2.0, base-4.14.1.0, base-4.14.0.0,
base-4.13.0.0, base-4.12.0.0, base-4.11.1.0, base-4.11.0.0, base-4.10.1.0,
base-4.10.0.0, base-4.9.1.0, base-4.9.0.0, base-4.8.2.0, base-4.8.1.0,
base-4.8.0.0, base-4.7.0.2, base-4.7.0.1, base-4.7.0.0, base-4.6.0.1,
base-4.6.0.0, base-4.5.1.0, base-4.5.0.0, base-4.4.1.0, base-4.4.0.0,
base-4.3.1.0, base-4.3.0.0, base-4.2.0.2, base-4.2.0.1, base-4.2.0.0,
base-4.1.0.0, base-4.0.0.0, base-3.0.3.2, base-3.0.3.1 (constraint from
non-upgradeable package requires installed instance)
[__1] fail (backjumping, conflict set: base, exercises)
After searching the rest of the dependency tree exhaustively, these were the
goals I've had most trouble fulfilling: base, exercises

make: *** [build] Error 1

Add exercises and tests for Lecture 1

Learn Haskell by participating in Hacktoberfest 2022!

Hey there! 👋🏻

If you found this issue while searching for Hacktoberfest contributions, read the following issue for more details about contribution in this project:

• haskell-beginners-2022/course-plan#8