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learning-haskell/06-typeclasses/6.14-chapter-exercises.md

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Chapter Excercises

Multiple choice

  1. (c)
  2. (b)
  3. (a)
  4. (c)
  5. (a)

Does it typecheck?

see src/typecheck.hs

Given a datatype declaration, what can we do?

  1. Will not type check. "chases" is a String not a Rocks and True is of type Bool, not Yeah
  2. Will typecheck.
  3. Will typecheck.
  4. Will not typecheck, because Papu is not an instance of Ord

Match the types

  1. Can't be substituted
  2. Can't be substituted
  3. Can be substituted
  4. Can be substituted
  5. Can be substituted
  6. Can be substituted
  7. Can't be substituted
  8. Can't be substituted
  9. Can be substituted
  10. Can be substituted
  11. Can't be substituted

Type-Kwon-Do Two: Electric Typealoo

see src/typekwondo.hs