A collection of problem sets for new Haskellers

Each folder contains a small project with a Problems.hs file filled with stub functions. Implement the functions and then test your solutions via

stack test

To add problems to a category, simply implement a stub for the function along with a comment describing what is expected. Along with the stub should be a spec in Tests.hs which then validates the problem.

Here are some online problem sets you could draw on:

• http://www.codeabbey.com/index/task_list
• https://techiedelight.quora.com/500-Data-Structures-and-Algorithms-practice-problems-and-their-solutions
• http://codeforces.com/problemset
• http://codingbat.com/java
• https://open.kattis.com/
• https://leetcode.com/problemset/all/
• http://wcipeg.com/problems
• http://poj.org/problemlist
• http://www.spoj.com/problems/classical/
• http://acm.timus.ru/problemset.aspx?space=1&page=all

• It would be best if your test did not directly implement the function for the problem so curious eyes can't simply peek at the answer.
• As much as you can, keep the concepts required to solve the problem limited to the ones covered in that folder. For example, don't require use of intersperse in a Functor problem.

These problem sets are meant to be practice with the various "foundational" concepts and libraries presented to people new to Haskell. While a tutorial for something like Aeson might be useful, it's unlikely to be very helpful to have problem sets for some obscure graphics package.

• The project folders follow a specific template. Follow that template to avoid confusion.
• Any resources you add to a folder's readme should be specifically related to the folder's concept. Don't simply link to the Haskell book and call it a day.
• Likewise, if there is a talk or video you want to link to, make sure that it links to the point in the talk which is actually relevant.