nullable Archives

[Solved] What is the difference between nullabe and non-nullable type in Kotlin

February 4, 2023 by Kirat

Nullable types can hold nulls. When type is nullable the question mark is set after it’s type: val str: String? = null Non-nullable types can’t hold nulls: val str: String = “some value” If we try to set null value to Non-nullable type, IDE will give an error and code will not be compiled: val … Read more

[Solved] Declare “Nullable[]” or “string[]?” for string array property that may or may not exist inside a class?

October 21, 2022 by Kirat

In short: you don’t need Nullable<T> or ? in this case at all. string[] is reference type: Console.WriteLine(typeof(string[]).IsValueType); the printed output will be false. So, it can be null without any decoration. Back to your sample. You need to specify setters as well to be able deserialize the given json fragement: public class Settings { … Read more