is equality for maps just checking the object reference, or is it seeing if they contain the same da...

# getting-started

[Chris Cunningham]

is equality for maps just checking the object reference, or is it seeing if they contain the same data

[karelpeeters]

Structural equality: https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-abstract-map/equals.html

[karelpeeters]

Which is more formally defined here: https://docs.oracle.com/javase/8/docs/api/java/util/Map.html#equals-java.lang.Object-

[karelpeeters]

So in the end it's equals on the keys and values.

[igor.wojda]

In Kotlin:
== always check for structural equality calling .equals() method under the hood
=== always checks for referential equality

This is more unified approach, then in Java

[karelpeeters]

But of course you still need to look at what .equals() does!

[Chris Cunningham]

Yeah works, the issue I was having was unrelated. Just worked since the key type was string and the value was a data class