Seems so simple, but, how do I initialize Kotlin’s MutableList to empty MutableList? I could hack it this way, but I’m sure there is something easier available: var pusta: List<Kolory> = emptyList() var cos: MutableList<Kolory> = pusta.toArrayList() 5 Answers 5
What is the difference between var and val in Kotlin? I have gone through this link: KotlinLang: Properties and Fields As stated on this link: The full syntax of a read-only property declaration differs from a mutable one in two ways: it starts with val instead of var and does not allow a setter. But … Read more
And the Kotlin newbie asks, “why won’t the following code compile?”: var left: Node? = null fun show() { if (left != null) { queue.add(left) // ERROR HERE } } Smart cast to ‘Node’ is impossible, because ‘left’ is a mutable property that could have been changed by this time I get that left is … Read more
What is the equivalent of this expression in Kotlin? a ? b : c This is not valid code in Kotlin. 33 s 33
I wonder if there is a way to check if a lateinit variable has been initialized. For example: class Foo() { private lateinit var myFile: File fun bar(path: String?) { path?.let { myFile = File(it) } } fun bar2() { myFile.whateverMethod() // May crash since I don’t know whether myFile has been initialized } } … Read more
