Hands-On Object-Oriented Programming with Kotlin

The listOfNotNull function

As we know, Kotlin is very strict when it comes to null objects. For this reason, we are provided with a dedicated list that ignores null objects if they are added. Create a list with the listOfNotNull function and add different variables, including nulls:

fun listOfNonNullObjects(){     val notNulls = listOfNotNull(1,null,"Two",null,'c',4.0,5)     println("Size = ${notNulls.size}")      for (element in notNulls){         println(element)     } }

If we take a look at the following output:

1, Two, c, 4.0, 5

we can notice that, although we have added seven objects in this list but we got five elements as an output because listOfNotNull does not insert null objects.