kotlin-extension Questions
1
Solved
I am trying to follow the official Android guide for ViewModels in Kotlin.
I literally copy pasted the easiest official example but the syntax seems to be illegal.
This section causes the problem:
...
Activator asked 11/7, 2020 at 21:54
4
Solved
In lombok extension method obj.method() is a syntax sugar for SomeUtil.method(obj). It allows for obj be null.
Kotlin extensions methods are resolved statically so I assume it's the same syntactic...
Hanes asked 24/1, 2018 at 17:2
3
Solved
I am new bie to Kotlin, Please help me how to use ViewModelProviders.of(this) in Kotlin
My code in java is
mFavViewModel = ViewModelProviders.of(this).get(FavouritesViewModel.class);
I am not...
Piccaninny asked 19/12, 2018 at 8:1
2
Solved
I'm a little confused about the advantages and disadvantages of using Android KTX vs Anko. Because both libraries are trying to achieve the same end goal, and the line between them it's getting a l...
Moneymaker asked 16/5, 2018 at 1:57
1
Solved
what is the difference between Kotlin's lazy delegate property lazy and lazyFast?.because it looks like same code.
private val key: String by lazy {
if (arguments != null && arguments?.g...
Melise asked 4/3, 2020 at 8:0
6
Solved
Anyone wonder this ? Splitting SPACE (" ") in kotlin is not working, i tried with different regex codes but is not working at all.
Tried with this :
value.split("\\s")[0];
value.split("\\s+")[0]...
Trepang asked 22/1, 2018 at 10:57
2
Solved
My Android project has two modules:
app
common
In settings.gradle:
rootProject.name='My project'
include ':app'
include ':common'
In my build.gradle:
implementation project(':common')
In c...
Kreg asked 23/1, 2020 at 9:10
6
Solved
In an attempt to understand more about Kotlin and play around with it, I'm developing a sample Android app where I can try different things.
However, even after searching on the topic for a while,...
Platitudinous asked 4/10, 2017 at 9:59
4
Solved
I'm trying to extend enum classes of type String with the following function but am unable to use it at the call site like so:
fun <T: Enum<String>> Class<T>.join(skipFirst: Int...
Mentor asked 13/3, 2016 at 4:24
2
Let's say I have a simple class Foo with a nullable String?
data class Foo(
val bar: String?
)
and I create a simple function capitalize
fun captitalize(foo: Foo) = when {
foo.bar != null -&g...
Axes asked 17/9, 2019 at 7:41
2
Solved
By using LiveData's latest version "androidx.lifecycle:lifecycle-livedata-ktx:2.2.0-alpha03", I have developed a code for a feature called "Search Products" in the ViewModel using LiveData's new bu...
Microbiology asked 30/8, 2019 at 9:5
1
Solved
Hi got this compile error when upgrading from okHttp version 3 to version 4:
val JSON = MediaType.parse("application/json; charset=utf-8")
//Compile Error: Kotlin: Using 'parse(String): MediaType?...
Problem asked 3/8, 2019 at 13:56
4
Solved
When I try to create Extension Function to set Boolean true or false like the below.
Boolean.setTrue(){
this = true
}
Boolean.setFalse(){
this = false
}
It says variable expected. How to achi...
Vitiate asked 29/8, 2017 at 19:3
1
Solved
I was making a simple maths calculator in kotlin, an error appeared on my screen when I tried to initialize the value of one of the variables used as 0.00 for float integer.
var x:Float= readLine(...
Lifeline asked 23/6, 2019 at 17:56
2
Sometimes I want to have an extension function on a generic type, whose parameter or return value is a subtype of the given type parameter, but without having to specify that actual type parameter....
Bailly asked 27/5, 2019 at 14:18
2
Solved
is it possible to do something like:
/**
* Converts all of the characters in the string to upper case.
*
* @param str the string to be converted to uppercase
* @return the string converted to ...
Ancona asked 2/10, 2018 at 13:48
1
Solved
I mean something like this:
fun operator Table.get(column_name: String) = this.column(column_name)
// Currently gives an error: "Expecting a top level declaration"
Table instance currently works...
Iridic asked 1/5, 2019 at 18:16
3
Solved
What's wrong with my extension function below
class Foo<T> {
fun <T> Foo<T>.plus(that: Foo<T>): Foo<T> = throw Exception()
init {
Foo<Int>() + Foo<String...
Parceling asked 1/10, 2015 at 9:23
4
Solved
Suppose I have the following code that I want to make as a re-usable component:
fun <T> MutableList<T>.swap(index1: Int, index2: Int) {
val tmp = this[index1] // 'this' corresponds to...
Sextodecimo asked 20/2, 2019 at 10:51
1
I want go get Type of T, but I can not get it from instance. I have to get it from class parameter, how to do it?
abstract class ViewModelFragment<T : ViewModel>{
protected lateinit var mVie...
Trochlear asked 21/11, 2017 at 16:37
2
Solved
I'm trying to convert this Java code to Kotlin:
public class HeaderInterceptor implements Interceptor {
@Override public Response intercept(Chain chain) throws IOException {
return null;
}
}
...
Burette asked 10/4, 2016 at 10:21
1
Solved
I have multi module kotlin gradle project in github here.
One of my sub project introducing-coroutines with build file build.gradle.kts file is here
The contents of build.gradle.kts is -
impor...
Syphon asked 19/1, 2019 at 2:6
3
Solved
I want to convert my java project to Kotlin, there are more than 500 java files. How can I convert it into Kotlin easily?
I know that we can convert one by one java file to Kotlin, But there are m...
Guenon asked 14/2, 2018 at 14:23
4
Solved
I am learning Kotlin, and I googled how to create a class in kotlin. So, I created the below class as a test.
In the main activity, I am trying to instantiate an object from the class Board, but i ...
Nevile asked 9/9, 2018 at 14:29
1
Solved
In dynamic languages like JavaScript/Python, it's possible to overwrite or "modify" functions during run-time. For example, in order to modify the alert function in JS, one could do:
const _prev_a...
Yonder asked 29/8, 2018 at 23:11
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