Is it me or `Uint8Array` (and any `TypedArray`) from Kotlin Wrappers doesn't let you set a byte at a...

# javascript

[Edoardo Luppi]

Is it me or Uint8Array (and any TypedArray) from Kotlin Wrappers doesn't let you set a byte at a specific index?
Doing

myArray[i] = myByte

results in an error. Am I overlooking a specific method?

[turansky]

Which error you receive?

[Edoardo Luppi]

@turansky like, the method doesn't exists.

[Ilya P]

I think it's because of this https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray/set

[Ilya P]

The og class has a method set that does something else and the wrapper code doesn't have a normal set(index, element) method.

[Ilya P]

Looks to me that this class requires some manual work that is missing, so might be a bug.

[Ilya P]

ArrayLike that it extends defines the get operator but not set. It seems like at this point there's no way to modify one elementwise at all?

[Edoardo Luppi]

@Ilya P yup, no way at all

[Edoardo Luppi]

Currently I'm using js('...') and asDynamic , but it's not a long term solution

[turansky]

cc @Sergei Grishchenko

[Edoardo Luppi]

Hi @turansky, let me know if it's better I create an issue in the wrappers repo to keep track of it.

[turansky]

Issue required

[turansky]

Not only TypedArray affected

[turansky]

No issue detected :)

[Edoardo Luppi]

@turansky oh yeah forgot about it, will create it in 5 mins, sorry

[turansky]

It will be helpful if you will highlight all types with similar problem

[turansky]

It's 40+ array like types, some of them support mutations

[Edoardo Luppi]

@turansky looked around a bit but it seems it's only related to the TypedArray hierarchy

[Edoardo Luppi]

Which means also Buffer from Node, but then it should get it for free from Uint8Array

[turansky]

@turansky looked around a bit but it seems it's only related to the TypedArray hierarchy

Magic? :)
0 additional candidates?

[Edoardo Luppi]

It would seem so, I'm browsing the code from the IDE where I have both kotlin-js and kotlin-node, and can't seem to find any other wrong code

Not sure where exactly the set method should be placed tho, maybe into ArrayLike as suggested above

[turansky]

Original ArrayLike has no setter

[Edoardo Luppi]

Yeah I can see now that it's all readonly

interface ArrayLike<T> {
    readonly length: number;
    readonly [n: number]: T;
}

[turansky]

Most child types located in browser types

[Edoardo Luppi]

In the TypeScript sources they're using

[index: number]: number;

For each TypedArray type. Maybe it should just be added to every one of them.

[turansky]

NodeList doesn't have setter for example :)

[Edoardo Luppi]

I'll create the issue as related to typed arrays only as of now. If other types needs to be adjusted they can be added there

[turansky]

😞