Object access using variable

1

I am just curious, will this kind of syntax be supported later?

let personName = person["name"]

let nameKey = "name"
let personName = person[nameKey]

Currently, if I do that the compiler thinks that I am trying to access an array, so it asks me for an integer
Thanks

2

No this will probably never be allowed.
If you want to have dynamic access to a field of a JS object, and given the different fields are homogeneous, you’d better model them as Js.Dict.t<'a> (https://rescript-lang.org/docs/manual/latest/api/js/dict)

3 Likes
3

Noted,
I was trying to use it as dynamic access for the object from API.
Anyway, I still able to work around using the switch statement.

Thanks for the reply @tsnobip

4

May be possible while keeping soundness by using Polymorphic Variants as long as it matches ones of the object keys

type flower = {
  color:  string,
  petals: int
}

let flower = {
  color: "red",
  petals: 5
}

type flowerKeys = [ #color | #petals ]

let key: flowerKeys = #color

flower[key]