This is the best approach when we are using the 'var' variable. ![]() Suppose we have a nullable reference a, we can say 'if a is not null, use it, otherwise use some non-null value x ' var a: String 'Nullable String Value' Now, a can be null. The following example demonstrates how this operator works. In Kotlin, we can declare variable which can hold null reference. It can only be used when we are sure that we are refereeing to a non-NULL able value. (Although you generally shouldn’t need to access so deeply into a class! Still, reducing the number of safe-calls can help readability). You can use the '.let' operator in Kotlin to check if the value of a variable is NULL. Let’s get on with it, shall we? For 2 or more constructor arguments, prefer not to keep the properties on the same line as the class name in the constructor definition class M圜lass ( val a: A, val b: B, ): MyParentClass(a, b), MyInterface ![]() ![]() Hopefully, the following tips and style recommendations (in no particular order) will help you write better Kotlin! One of the major benefits of Kotlin as a JVM language is that you can use any and all Java libraries natively. I’ve been meaning to write this article in a while.
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