Hello, I have such method in a library: ```open fun track(event: String, properties: Map<Any?, *&...

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[Nikita Khlebushkin]

Hello, I have such method in a library:

open fun track(event: String, properties: Map<Any?, *>?, options: Map<Any?, *>?): Unit

How can I create a map that would have satisfy properties type?

[satyan]

fun track(event: String, properties: Map<Any?, *>?, options: Map<Any?, *>?): Unit {
    // implementation    
}

track("", mapOf("test" to 1, 1 to 2, null to null), mapOf("a" to ""))

You can put every type you want in this 🤔

[Nikita Khlebushkin]

Hmm, indeed

[Nikita Khlebushkin]

But when I try this

val p = mutableMapOf<String, Any>()
track("", p, mapOf("a" to ""))

it fails with

Type mismatch: inferred type is MutableMap<String, Any> but Map<Any?, *>? was expected

[Nikita Khlebushkin]

How can I overcome it?

[satyan]

Declare p type

val p: Map<Any?, String> = mutableMapOf...

[Nikita Khlebushkin]

Didn't quite help 😞

val p: Map<String, Any?> = mutableMapOf<String, Any>()
track("", p, mapOf("a" to ""))

Type mismatch: inferred type is Map<String, Any?> but Map<Any?, *>? was expected

[Shawn]

why are you parameterizing the call to mutableMapOf() with String, Any if you need Any?, *? keys in maps are invariant — just call mutableMapOf<Any?, Any>() and put your entries in

[Nikita Khlebushkin]

I totally missed it out. Thanks!