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1 point by Pauan 4429 days ago | link | parent

For comparison, here it is with some parens:

  (duck) ->
    [ quack -> (prn "Quack")
      fly   -> (prn "Flap, Flap") ]

  (person %n) ->
    [ quack -> (prn "@%n walks in the forest and imitates ducks to draw them")
      fly   -> (prn "@%n takes an airplane") ]

  (quack-and-fly [ quack %q fly %f ]) -> (%q); (%f)

  (quack-and-fly (duck))
  (quack-and-fly (person "Jules Verne"))
I wasn't sure whether "quack" and "fly" should be in parens or not...


1 point by Pauan 4429 days ago | link

Like Haskell, it may be better to use =

  duck =
    [ quack = (prn "Quack")
      fly   = (prn "Flap, Flap") ]

  person %n =
    [ quack = (prn "@%n walks in the forest and imitates ducks to draw them")
      fly   = (prn "@%n takes an airplane") ]

  quack-and-fly [ quack %q fly %f ] = %q; %f

  quack-and-fly duck
  quack-and-fly person "Jules Verne"
Oh my, am I going to invent a dynamically typed Haskell with immutable objects? I guess next will be laziness and monads...

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