I found myself doing bellow code very often when h...

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[Pablichjenkov]

I found myself doing bellow code very often when having a nullable variable in a class. Is there a less verbose pattern?

class SomeClass {
 
    var aVar: OtherClass? = null

    fun aFunction() {

        aVar?.let {
            //doSomething with aVar since 'it' is not null
        } ?: run {
            //doSomething else when aVar is null
        }

    }

}

I know that I can do this:

fun aFunction() {

    val aVarLocalCopy = aVar

    if (aVarLocalCopy != null) {
            //doSomething with aVarLocalCopy
    } else {
            //doSomething else when aVarLocalCopy is null
    }

}

But I don’t like the fact of creating one line of code to extract the thread safe local reference copy of aVarProperty. Any pattern or extension function to write above code shorter.

[Shawn]

I don’t think this is particularly verbose, buuuut I mean, you could use a when

[Shawn]

fun aFunction() {
    when (val aVarLocalCopy = aVar) {
        null -> {

        }
        else -> {

    }
  }
}

[Shawn]

it’s worth mentioning that you wouldn’t really be making a copy of aVarProperty, you’d just be making a new immutable copy of the reference

[Pablichjenkov]

yes, that I am aware of. I guess the real copy only happens if aVar is a primitive.
Anyways, back to the original question. When looks pretty neat, in fact a co-worker had suggested that too, just wanted to see what others are doing. Thanks Shawn