Why is this not allowed? ``` val map: Map<String, Int>? = mutableMapOf("one" to 3) ...

# announcements

[Martin Nordholts]

Why is this not allowed?

val map: Map<String, Int>? = mutableMapOf("one" to 3)
        map?.["one"] // <- Why is this not allowed?
        map?.get("one") // <- Which is equivalent to this, which works

[Slava Sukhochev]

Use map?["one"]
Without the dot

[Martin Nordholts]

Still doesn’t work, here is Kotlin Playground for it: https://pl.kotl.in/IxeuOxPo6

[marstran]

That doesn't compile

[marstran]

You can do map?.let { it["one"] }. The ? just doesn't work with the operator syntax.

[Ruckus]

There is a long standing issue for it (unfortunately it doesn't look like it has any traction): https://youtrack.jetbrains.com/issue/KT-8799

[Anastasia Finogenova]

You can't use this access syntax [] on a nullable receiver either for map or array only ?.get

[Anastasia Finogenova]

The IDE actually should have a warning for that and autocorrect at least Android Studio has