Hi all. I was wondering if there’s a nice way to do something like: ```val myObject: MyClass? = map...

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[bodiam]

Hi all. I was wondering if there’s a nice way to do something like:

val myObject: MyClass? = map.ifKeyPresent("xyz) { return MyClass(it }.orElse { null }

So, basically, if a map contains the key, convert the value of that key to a different type, and if it’s not there, return something else, for example null. Does something like this exist?

[vineethraj49]

val myObject = map["xyz"]?.let { MyClass(it) }

[bodiam]

Oh wow, that simple? Thanks!

[vineethraj49]

won't work if your map is <key, value?>

[vineethraj49]

caveat

[vineethraj49]

like, <string, int?>

[bodiam]

Fair enough. The actual use case was actually Python, but I was wondering what the Kotlin equivalent was.

[Tobias Berger]

if null-Values are possible and you really want to check if the key exists, you could do

val myObject = if ("xyz" in map) MyClass(map["xyz"]) else null

but I guess that's a really rare case

[Michael de Kaste]

@vineethraj49 true, but since existence with null and non-existence encapsulate the same meaning, one should ask themselves if making a map with nullable values is what you want to begin with.