Is the map returned by mutableMapOf(...) multihrea...

# random

[bogdoll]

Is the map returned by mutableMapOf(...) multihread-capable? E.g. is it a ConcurrentHashMap or something similiar?
If not, what map should I use in multithreading environment. e.g ConcurrentHashMap?

[Dominaezzz]

It is not thread safe. Yes use ConcurrentHashMap.

[Rob Elliot]

Probably better asked in #getting-started, incidentally.
Also - you can just CTL/CMD click through to see its definition in IntelliJ, which will show you it's a kotlin.collections.LinkedHashMap, which is an expect class.

Unfortunately IntelliJ doesn't make it easy to go from an expect class to an actual class (as far as I can see) but if you look in kotlin-stdlib-1.6.10.jar!/kotlin/collections/TypeAliases.kt you'll see that public actual typealias LinkedHashMap<K, V> = java.util.LinkedHashMap<K, V>.

[Youssef Shoaib [MOD]]

Unfortunately IntelliJ doesn't make it easy to go from an expect class to an actual class

A good trick I've used is to Ctrl-Shift-F (Search everywhere) and then Scope -> All Places and search for a actual class ClassName or actual typealias ClassName

[Rob Elliot]

Yup, that's how I found that one! But it's not nearly as convenient as navigating from, e.g., interface -> implementations.

[Rob Elliot]

Having said that there's no easy way to get from kotlin.collections.MutableMap to its implementations either... looks like some of the hierarchy navigation doesn't work inside dependency sources?