Comments (2)
This probably falls out of the scope, but it would be great if there was Chapter 5 on reading & writing files, IO and do
stuff. I find this the most confusing and discouraging part of Haskell.
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Task 4 "next" is too trivial and I think a very basic recursion example might be a better fit. I would remove Task 4, renumber Tasks 5-7 as 4-6 and insert a problem like this for a new task 7:
Enter an integer such that if the number is > 0 it will call the function recursively as n - 1 or n < 0 call recursively as n + 1 until n reaches 0. A sample solution might look like this:
countToZero :: (Num a, Num p, Ord a) => a -> p
countToZero n
| n == 0 = 0
| n < 0 = countToZero (n + 1)
| n > 0 = countToZero (n - 1)
(Sorry for not so great formatting)
If I was writing this in JavaScript, I would actually want to console.log(n) as we count towards 0, not actually sure how to do that in Haskell yet! Only completed Chapter 1, but I am very much enjoying my first toe dip into Haskell. Else, all answers just give you zero, instead of something neat like this (if you did console.log(n) at each iteration):
countToZero 3
3 2 1 0
countToZero (-4)
-4 -3 -2 -1 0
In any case, I think putting in a very basic recursion problem would help make the "final boss" easier to think through (although I don't think task 10 is exceptionally difficult as is either).
from learn4haskell.
Related Issues (20)
- Bug in est/Test/Chapter1.hs ? HOT 3
- Use default main branch
- Unable to open pull request for Chapter 4 HOT 2
- Build dependency happy fails on OSX 10.15.7 HOT 2
- Update GHC to 8.10.4
- [RFC] Create certificate when all Chapters are passed HOT 1
- Chapter 3 knight Monster clarification HOT 2
- Create 2021 Hacktoberfest logo
- Chapter2: takeEven or dropEven? HOT 1
- Odd test output results HOT 4
- Question about a test HOT 2
- Useful to have docker instructions in README.md? HOT 3
- Is this wording about typeclasses correct in Chapter3.hs? HOT 1
- Save @vrom911's and @chshersh's time by including solutions HOT 1
- are my solutions be mentored ? HOT 1
- Error resolving dependencies while make test-chapter1-basic. HOT 10
- Typo in chapter 1: `Add` instead of `add`
- Upgrade to GHC 9.2
- Upgrade to GHC-9.4
- [Chapter 4] Is it possible to have an instance of Functor for "Trap e" of "Secret e a"?
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