haskell-book-exercises/ch21/ch21.adoc at gh-pages · chaks7/haskell-book-exercises · GitHub

21 Traversable

21.12 Chapter Exercises

Traversable instances

Identity
```
link:ch21_21.12_1.hs[role=include]
```
Constant
```
link:ch21_21.12_2.hs[role=include]
```
Maybe
```
link:ch21_21.12_3.hs[role=include]
```
List
```
link:ch21_21.12_4.hs[role=include]
```
Tree
```
link:ch21_21.12_5.hs[role=include]
```
Tree'
```
link:ch21_21.12_6.hs[role=include]
```
S

Note
tests are passing, but I kind of hacked it until it compiled. Also, hardcoded use of [] for the inner type. Don’t know how to generate one :(
```
link:ch21_21.12_7.hs[role=include]
```

Instances for Tree

link:ch21_21.12_8.hs[role=include]