How I Learned to Stop Worrying and Love the State Machine

Re:How I Learned to Stop Worrying and Love the State Machine by eschew on Tuesday February 27, 2018 @03:14AM (#16471859)

mkPlayer can be simplified further!

  mkPlayer :: Maybe Weapon -> Class -> Either Error Player

  mkPlayer (Just Staff) Warrior = Left "A Warrior cannot equip a Staff"
  mkPlayer (Just Sword) Wizard = Left "A Wizard cannot equip a Sword"
  mkPlayer weapon klass = Right (Player weapon klass)

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Re:How I Learned to Stop Worrying and Love the State Machine by yen223 on Tuesday February 27, 2018 @03:51AM (#16472026)

You lose exhaustiveness checks if new weapons or classes were added though. May or may not be worth the trade-off.

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