Hi there,
I'm fairly new in Functional Programming and Elm language and I was hoping
someone could tell me if what I'm doing is correct or it goes against Elm
and its pure functions. I have a model, defaultModel, with some values by
default. I have a couple functions that create a new model using
defaultModel as a template, but I'm not passing this model, which makes me
doubt about the correct use of pure functions. Let's have a look at this
with an example:
type alias Model =
{ prop1 : String
, prop2 : Int
, prop3 : Bool
}
defaultModel : Model
defaultModel =
{ prop1 = "Test"
, prop2 = 5
, prop3 = True
}
createModelWithProp1Something : Model
createModelWithProp1Something =
{ defaultModel | prop1 = "Something" }
createModelWithProp2Ten : Model
createModelWithProp2Ten =
{ defaultModel | prop2 = 10 }
createModelWithProp3False : Model
createModelWithProp3False =
{ defaultModel | prop3 = False }
So the question is, is it correct to use this defaultModel inside these
functions without passing it in?, If it's not, could anyone explain me
why?. I have the feeling that it goes against pure functions, but I'm
thinking, defaultModel won't ever be mutated, so no risk of side effects.
Thanks a lot in advance
Fran
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