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kotlinlang

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?

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

won't work if your map is &lt;key, value?&gt;

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

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

<@UMGPA5ZAS> 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.