kotlin

[Solved] What’s the difference between Calendar.getInstance().get(Calendar.DAY_OF_WEEK) and Calander.DAY_OF_WEEK in java

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Introduction Calendar is an important class in Java that is used to manipulate dates and times. It is important to understand the difference between Calendar.getInstance().get(Calendar.DAY_OF_WEEK) and Calendar.DAY_OF_WEEK in order to properly use the Calendar class. This article will explain the difference between the two and provide examples of how to use them. Solution Calendar.getInstance().get(Calendar.DAY_OF_WEEK) is … Read more

[Solved] Which one is better between pure data class and a normal class with business logic in Kotlin?

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Semantically speaking set() is not the best naming for what you’re actually doing. Since Kotlin supports extension functions, you can have both of the approaches at once. data class BluetoothDef( val isChecked: Boolean = true, val status: Boolean = false ) : DeviceDef fun BluetoothDef.with(context: Context) { BluetoothHelper(context).setBluetooth(this) } 0 solved Which one is better … Read more

[Solved] Translation of Plus and Minus button previous and next to EditText Respectively Code that is in Kotlin to Java [closed]

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So here is your code in Java: public class MainActivity extends AppCompatActivity implements View.OnClickListener { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); findViewById(R.id.increase).setOnClickListener(this) findViewById(R.id.decrease).setOnClickListener(this) } public void increaseInteger() { display(Integer.parseInt(integer_number.getText().toString()) + 1); } public void decreaseInteger() { display(Integer.parseInt(integer_number.getText().toString()) – 1); } private fun display(int number) { integer_number.setText(String.valueOf(number)); } @Override protected void onClick(View v) { … Read more

[Solved] Equivalent Kotlin code to my F# functional code [closed]

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The main problem I found was finding an equivalent operator to the pipeOperator|>, then i found three potential alternatives: using .let using .run using infix function Below example was good startup for me to solve my issue: fun main(args: Array<String>) { var a = 3 val b: Int = 6 println(“Hello World! doubling, then tripling … Read more

[Solved] How to simplify the default implementation of a kotlin function

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Oh,yeah.I simplified a bit of code. fun paidMore(amount: Int, employee: Employee, predicate: (Int, Employee) -> Boolean = { _, _ -> employee.salary > amount } ): Boolean = predicate(amount, employee) now,I simplified the code again import org.jetbrains.spek.api.Spek import org.jetbrains.spek.api.dsl.describe import org.jetbrains.spek.api.dsl.it import kotlin.test.assertFalse import kotlin.test.assertTrue object ClosureSpec : Spek({ describe(“Test, add a default implementation to … Read more

[Solved] “Java is not recognised as an internal or external command” in vs code even though I am trying to use kotlin. I properly set the path also

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This error occurs because you have not installed the Java JDK. How to use Kotlin in VS code First you need to install the following programs on your machine Install Java JDK on the computer system Install Kotlin on your computer system VS code install plugin Kotlin Language VS code install plugin Code Runner installation … Read more

[Solved] MainActivity.kt doesn’t see button’s id?

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You’re writing your code outside of MainActivity‘s onCreate (or any other) method scope. Your code is: class MainActivity: AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) } button3.setOnClickListener { } } But must be: class MainActivity: AppCompatActivity() { override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) setContentView(R.layout.activity_main) button3.setOnClickListener { // do something } } } You … Read more

[Solved] Is anyone still using Java? Can I have this translated please? [closed]

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Here is the java Version private Boolean isDarkTheme(Activity activity) { return (activity.getResources().getConfiguration().uiMode & Configuration.UI_MODE_NIGHT_MASK) == Configuration.UI_MODE_NIGHT_YES; } Java getResources() ->Kotlin resources Java getConfiguration() ->Kotlin configuration Java & ->Kotlin and as you see it’s simple Setters and Getters in koltin are accessed by property name solved Is anyone still using Java? Can I have this translated … Read more