Kotlin, a modern statically typed programming language, offers many powerful features to streamline coding, one of which is its support for generics. Generics enable you to write flexible and reusable code, allowing types to be parameters when defining classes, interfaces, and functions. Understanding the intricacies of generics is crucial for leveraging Kotlin's full potential. In this blog, we'll delve into the concepts of in , out , and where in Kotlin's generics. What Are Generics? Generics are a feature that allows you to define classes, interfaces, and methods with placeholder types. This way, you can create more flexible and reusable components. For instance, you can create a List<T> that can hold any type T , rather than creating separate classes for each type. class Box<T>(val value: T) fun main() { val intBox = Box(1) val stringBox = Box("Hello") } In this example, Box<T> is a generic class where T
How to Insert Multiple rows in a single db transaction in Android Room Database? | Android | Room DB
To insert multiple rows into a Room database in Android, you can follow these steps: 1. Set up Room Database: First, make sure you have set up your Room database correctly in your Android project. Define your Entity class, create a Database class that extends RoomDatabase, and set up your DAO (Data Access Object) interface. 2. Create Entity Class: Define an Entity class that represents the data you want to insert into the database. For example: 1 2 3 4 5 6 7 8 9 @Entity (tableName = "my_table" ) public class MyEntity { @PrimaryKey (autoGenerate = true ) public int id; public String name; public int age; // Add other fields and getters/setters as needed } Create DAO: Create a DAO interface with a method to insert multiple rows. For example: 1 2 3 4 5 @Dao public interface MyEntityDao { @Insert void insertAll (List<MyEntity> entities); } Initialise Database and DAO: In your application code, create an insta