7/7/2023 0 Comments Kotlin null check![]() I am new to Kotlin so I dont know how to use Optionals. NEWBEDEV Python Javascript Linux Cheat sheet. ![]() However, instead of proposing the null-object pattern, Id recommend an implementation of the Optional type: data c. You can use it in combination with the Elvis operator. As Guenhter explained, this is not possible. Note that if the variable is a mutable property, you won't be able to smart cast it to its non-nullable type inside the if statement (because the value might have been modified by another thread) and you'd have to use the safe call operator with let instead. Therefore when comparing to null, the structural equality a = null is translated to a referential equality a = null.Īccording to the docs, there is no point in optimizing your code, so you can use a = null and a != null A nullable type is a variation of an existing type, and can contain a null value. ![]() A structural equality a = b is translated to a?.equals(b) ?: (b = null) Summary Default Kotlin types cannot contain null values.
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