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13 lines
370 B
13 lines
370 B
# Chapter 16 |
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## Maybe |
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### Exercise: Possibly |
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see src/Possibly.hs |
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## Either |
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### Short Exercise |
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### Exercise 1 |
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see src/Sum.hs |
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### Excercise 2 |
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Functor expects a type with kind `* -> *`. `Sum` and `Either` are of kind `* -> * -> *` In order to reduce it to `* -> *` we need to apply one type of kind `*`, but the only one we can apply right now is the first in the list. |
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