Questions tagged [kotlin]
Kotlin is a cross-platform, statically typed, general-purpose high-level programming language with type inference. This tag is often used alongside additional tags for the different targets (JVM, JavaScript, native, etc.) and libraries/frameworks (Android, Spring, etc.) used by Kotlin developers, if the question relates specifically to those topics.
kotlin
96,540
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Kotlin and Android Databinding
Updated 21.06.2015
I wanna try kotlin and android databinding in a same project. But when I add to kotlin-gradle-plugin dependency I cannot build even an empty project anymore with error:
cannot ...
- 4,831
2
votes
1
answer
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Kotlin JS - Accessing HTML DOM properties
What is the canonical way to access HTML DOM properties in Kotlin. I don't see some of the dom properties like offsetHeight & offsetWidth exposed in the Element
var e : Element? = document....
- 1,925
1
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2
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Kotlin JS - string to number conversion?
How to do String to number conversion in Kotlin JS app. I am Using the following code and having some trouble converting from the HTMLInputElement value to double.
fun c2f(self: Any) {
console.log(...
- 1,925
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vote
2
answers
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Where is the old Kotlin specification hosted?
I am trying to find the old version of Kotlin site (jetbrains.com/kotlin) with the old documentation. I saw it somewhere on the internet not so long ago, but now I can not find it.
Please, point me ...
- 33.3k
3
votes
2
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SugarORM + Kotlin: Unresovled reference "listAll"
I am trying to use the gorgeous Kotlin and SugarORM in combination for Android development and have my models set up like this:
import com.orm.SugarRecord
public class Contact : SugarRecord<...
- 1,157
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votes
2
answers
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Partial class delegation in Kotlin
How do I partial delegate methods/fields in Kotlin?
To be specific: here I am trying to inherit class User from interface TraitA and implement field marked: Boolean in the wrapper StateA. That would ...
- 33.3k
15
votes
2
answers
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Access property delegate in Kotlin
Kotlin has delegated properties which is a very nice feature. But sometimes get() and set() methods are not enough. Let's say I want to create a Closeable object lazily and to close it later. Here's ...
- 54.5k
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Kotlin stub/placeholder function for unimplemented code
Scala's Predef has a bunch of shorthand functions including one for unimplemented code, namely ???. Does Kotlin have anything similar rather than having to resort to the longhand
throw Error("Code ...
user3543130
16
votes
2
answers
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Use Kotlin extension in android java class
Is it possible to use a kotlin extension in a android java class?
Example:
fun String.getSomething(): String {
return "something"
}
then in Java use it like:
String someString = "blabla";
...
- 6,340
75
votes
12
answers
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Kotlin 'when' statement vs Java 'switch'
Pattern matching in Kotlin is nice and the fact it does not execute the next pattern match is good in 90% of use cases.
In Android, when database is updated, we use Java switch property to go on next ...
- 6,039
1
vote
0
answers
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Kotlin let analogue which returns the receiver [duplicate]
I was wondering if there's a standard function which behaves similarly to let but returns the receiver itself, not the value calculated by block.
My piece of code with let:
fun rightParts(s: Lexeme) ...
- 146k
38
votes
10
answers
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Kotlin - IntelliJ Project Setup
I want to start a new project with Kotlin for the JVM using the IntelliJ IDE, but I can't get a configuration for it to work. I was attempting to follow this tutorial, and after that didn't work (the ...
- 1,655
3
votes
2
answers
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Using multiple JVM languages in the same project
I'd like to use Kotlin & Scala together in projects, and maybe some other languages, but I've seen no good way of doing it. The only way I thought of was compiling one language and decompiling it ...
- 934
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votes
3
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Volatile properties in Kotlin?
How does one mark a var in Kotlin volatile?
volatile public var tmpEndedAt: Long? = null
gives me the error:
"unresolved reference: volatile"
- 4,442
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votes
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Dollar Sign Character in Multiline Strings
What is the cleanest method for adding a $ character in a string literal?
The best solution I've come up with so far is """${"$"}...""", which looks ugly to me.
- 1,272