Jan
29
Kotlin null safety for Optional experienced
In this article I will try to map methods of Java’s Optional to Kotlin’ssimilar scattered language features and built-in functions. The code in the examples is written in Kotlin, because the language has all the JDK classes available.
Representation
Let’s start with the representation. The Opitonal usage, requires creating a new object for the wrapper every time some value is wrapped or transformed to another type, with exclusion of when the Optional is empty (singleton empty Optional is used). In Kotlin there is no additional overhead, lanuage uses plain old null.
Representation
Let’s start with the representation. The Opitonal usage, requires creating a new object for the wrapper every time some value is wrapped or transformed to another type, with exclusion of when the Optional is empty (singleton empty Optional is used). In Kotlin there is no additional overhead, lanuage uses plain old null.
