How can different types share data?
Question
Solution
Alternative Solution
type Animal
= Dog DogData
| Bird BirdData
type alias DogData =
{ name : String
, runningSpeed : Float
}
type alias BirdData =
{ name : String
, wingSpan : Float
}
{-| This function should work for all Animals
-}
getName {name} =
name
type alias Animal =
{ name : String, data : AnimalData}
type AnimalData
= Dog DogData
| Bird BirdData
type alias DogData =
{ runningSpeed : Float
}
type alias BirdData =
{ wingSpan : Float
}
getName : Animal -> String
getName {name} =
name
type Animal =
Dog DogData
| Bird BirdData
type alias AnimalData species =
{species| name : String}
type alias DogData =
AnimalData {runningSpeed:Float}
type alias BirdData =
AnimalData {wingSpan:Float}
getName : AnimalData species -> String
getName {name} =
name
How can I write one function for all animals, that returns just the
name.Put the common data, in our case the name, all in one case and separate it from the differing data.