scala-AI-powered Scala guide

Example

```scala sealed trait Animal case class Dog(name: String) extends Animal case class Cat(name: String) extends Animal val animal: Animal = Dog("Buddy") animal match { case Dog(name) => println(s"This is a dog named $name") case Cat(name) => println(s"This is a cat named $name") } ```

Scenario

Pattern matching is used in scenarios where you need to perform different actions based on the structure of an object. For instance, in a system that processes different types of user commands, pattern matching can be used to handle each command type appropriately.

Example

```scala val numbers = List(1, 2, 3) val newNumbers = 0 :: numbers println(newNumbers) // Output: List(0, 1, 2, 3) ```

Scenario

Immutability is crucial in multi-threaded environments where shared state can lead to concurrency issues. By ensuring that data structures cannot be modified after they are created, Scala helps prevent such problems, making it easier to reason about program behavior.

Example

```scala val numbers = List(1, 2, 3, 4, 5) val doubled = numbers.map(_ * 2) println(doubled) // Output: List(2, 4, 6, 8, 10) ```

Scenario

Higher-order functions are functions that take other functions as parameters or return them as results. They are particularly useful in scenarios involving data processing pipelines, such as transforming a list of numbers, filtering elements, or combining data from multiple sources.