<How create extension function ifNullOrEmpty?> I w...

# stackoverflow

[user]

How create extension function ifNullOrEmpty?
I want to create a function like ifEmpty() of Kotlin that will also check for null:
ifNullOrEmpty{
//some code if null or empty
}

How can i do this?
And does anyone know what the code below is called?
: R where C : CharSequence, C : R

Example of Kotlin ifEmpty() function.
@SinceKotlin("1.3")
@kotlin.internal.InlineOnly
public inline fun C.ifEmpty(defaultValue: () -> R): R where C : CharSequence, C : R =
if (isEmpty()) defaultValue() else this

Thanks and have a nice day!