Hello. How can I implement "thisArg" (Value to use...

# javascript

[Pavel Matusevich]

Hello. How can I implement "thisArg" (Value to use as this when executing callback) from JS Set? My current implementation is

@JsName("Set")
external class JsSet<T> {
...
fun <A> forEach(callback: (value: T, key: T, set: JsSet<T>, thisArg: A) -> Unit, thisArg: A)
...
}

However, when calling this function

forEach({ key, value, set, thisArg ->
                            console.log("1", key, "2", value, "3", set, thisArg)
                        }, "thisArgValue")

thisArg is undefined , when it should be "thisArgValue"
Thanks.

[turansky]

In Kotlin world it won’t be single signature
You can describe first signature for start:

forEach(action: (T) -> Unit)

Second - forEachIndexed has no direct mapping, by can be declared with magic Suppress