how to transform Nil to None scala
To transform Nil
to None
in Scala, you can use the Option
type. The Option
type in Scala represents a value that may or may not be present. Here's how you can transform Nil
to None
:
val nilList: List[Int] = Nil
val optionList: Option[List[Int]] = Some(nilList).filter(_.nonEmpty)
In the above code snippet, we start with a Nil
list and then wrap it in the Some
constructor. We use the filter
method to check if the list is non-empty (_.nonEmpty
), and if it is empty, it will transform it to None
. If the list is non-empty, it will remain as Some
.
Now, optionList
will be of type Option[List[Int]]
and will be None
if the initial list was Nil
, or Some(List[Int])
if the list was non-empty.
This is how you can transform Nil
to None
in Scala using the Option
type.