Kotlin doesn’t have the same notion of static fields as used in Java. In Java, the generally accepted way of doing logging is: public class Foo { private static final Logger LOG = LoggerFactory.getLogger(Foo.class); } Question is what is the idiomatic way of performing logging in Kotlin? 17 Answers 17
So, due to lack of methods like Long.valueOf(String s) I am stuck. How to convert String to Long in Kotlin? 11 Answers 11
What does a single exclamation mark mean in Kotlin? I’ve seen it a few times especially when using Java APIs. But I couldn’t find it in the documentation nor on StackOverflow. 7 Answers 7
In Kotlin is there an equivalent to the Swift code below? if let a = b.val { } else { } 16 Answers 16
What is the correct way to define a var in kotlin that has a public getter and private (only internally modifiable) setter? 2 Answers 2
I’m reading Kotlin Coroutine and know that it is based on suspend function. But what does suspend mean? Coroutine or function gets suspended? From https://kotlinlang.org/docs/reference/coroutines.html Basically, coroutines are computations that can be suspended without blocking a thread I heard people often say “suspend function”. But I think it is the coroutine who gets suspended because … Read more
Given function foo : fun foo(m: String, bar: (m: String) -> Unit) { bar(m) } We can do: foo(“a message”, { println(“this is a message: $it”) } ) //or foo(“a message”) { println(“this is a message: $it”) } Now, lets say we have the following function: fun buz(m: String) { println(“another message: $m”) } Is … Read more
I’m converting Java to Kotlin with Android Studio. I get double bang after the instance variable. What is the double bang and more importantly where is this documented? mMap!!.addMarker(MarkerOptions().position(london).title(“Marker in London”)) 4 Answers 4
How is it recommended to create constants in Kotlin? And what’s the naming convention? I’ve not found that in the documentation. companion object { //1 val MY_CONST = “something” //2 const val MY_CONST = “something” //3 val myConst = “something” } Or …? 15 Answers 15
This question already has answers here: How to sort based on/compare multiple values in Kotlin? (3 answers) Closed 5 years ago. Let’s say I have a list of People which I need to sort by Age first and then by Name. Coming from a C#-background, I can easily achieve this in said language by using … Read more
