Repository navigation
Syntax sugar to test equality #758
Description
I find myself writing this kind of function a lot:
let kind = "target kind"
records |> Array.select((record : MyRecordType) { record.kind == kind })If we had a syntax sugar such as: .property=(val, type) then I could clarify it as such:
records |> Array.select(.kind=(kind, MyRecordType))More general solution: function composition operator?
If we had a function composition operator (suppose we call it ||>) and a generic equality function (suppose it's Object.eq) then I could rewrite the function as:
records |> Array.select(.kind(MyRecordType) ||> Object.eq(kind))...which is almost as nice as the syntax sugar, and much more general.
While I'm making wishes
Mint knows the type of records at compile-time: it's an Array(MyRecordType). That makes me think it could be possible to propagate that to .kind, making a hypothetical function real pithy:
records |> Array.select(.kind=(kind))
// or...
records |> Array.select(.kind ||> Object.eq(kind))
Activity
gdotdesign commentedon Mar 31, 2025
Thanks for opening this issue 🙏
I think it is a good opportunity for a helper function:
There could be a package with a module with a bunch of these helper functions.
A working example here: https://mint-lang.com/sandbox/UPQfBJi5vWzNVA
.kind) were optional before and basically was a syntax sugar for(item: {kind: a, ...}) { item.kind }and caused some type checking bugs. Maybe there is a way to make sure that we can resolve the type properly, I'll put in on the wishlist 🙂