How to run code if object is null?

Question

In Kotlin, I can run code if an object is not null like this:

data?.let {     // execute this block if not null } 

But how can I execute a block of code if the object is null?

Answer 1

You can use the elvis operator and evaluate another block of code with run { ... }:

data?.let {     // execute this block if not null } ?: run {     // execute this block if null } 

But this seems not to be quite as readable as a simple if-else statement.

Also, you might find this Q&A useful:

• In Kotlin, what is the idiomatic way to deal with nullable values, referencing or converting them