Assign value if not exist in Scala

In Scala, one way to assign a value if it does not exist is to use the getOrElse method, which is available for Option objects. Here is an example of how to use getOrElse:

val someValue: Option[String] = Some("existing value")
val defaultValue = "default value"
val result = someValue.getOrElse(defaultValue)

In this example, someValue is an Option object that contains a value, "existing value". We want to assign a value to result that is the value of someValue if it exists, or "default value" if it does not.

The getOrElse method takes a parameter that is the default value to return if someValue is None.

In this case, someValue is not None, so result is assigned the value "existing value".

If someValue were None, then result would be assigned the value "default value".