Mastering Scala: Challenging Assignments and Expert Solutions

 Welcome, aspiring Scala programmers and enthusiasts, to a deep dive into the realm of Scala programming! In the ever-evolving landscape of software development, mastering Scala can open up a plethora of opportunities. Today, we delve into the intricacies of Scala through challenging assignments and expert solutions. Whether you're a seasoned developer seeking to sharpen your skills or a student grappling with Scala assignments, our platform, programminghomeworkhelp.com, stands ready to provide comprehensive Scala programming assignment help. Let's embark on this journey of knowledge and mastery together.

Assignment 1: Functional Programming Paradigm

Problem Statement: You are tasked with implementing a higher-order function in Scala that takes a list of integers and a function as arguments. The function should return a new list containing only the elements of the original list for which the function returns true. Additionally, you need to implement a function that checks if a given integer is prime.

Solution:

def filterList(list: List[Int], f: Int => Boolean): List[Int] = {
  list.filter(f)
}

def isPrime(n: Int): Boolean = {
  if (n <= 1) false
  else if (n == 2) true
  else !(2 to (n - 1)).exists(x => n % x == 0)
}

// Example usage:
val myList = List(1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
val primeList = filterList(myList, isPrime)
println(primeList) // Output: List(2, 3, 5, 7)

Explanation: The filterList function takes a list and a predicate function f. It applies f to each element of the list and returns a new list containing only the elements for which f returns true. The isPrime function checks if a number is prime using a simple primality test algorithm. We then demonstrate the usage of filterList to filter prime numbers from a list of integers.

Assignment 2: Object-Oriented Programming

Problem Statement: You are required to design a class hierarchy for a library management system in Scala. The system should support books, e-books, and audio-books. Each book has a title, author, and publication year. E-books additionally have a format (e.g., PDF, ePub), while audio-books have a narrator. Implement the necessary classes and demonstrate their usage.

Solution:

abstract class Book(val title: String, val author: String, val publicationYear: Int)

class Ebook(title: String, author: String, publicationYear: Int, val format: String) extends Book(title, author, publicationYear)

class Audiobook(title: String, author: String, publicationYear: Int, val narrator: String) extends Book(title, author, publicationYear)

// Example usage:
val myEbook = new Ebook("Scala Programming", "Martin Odersky", 2020, "PDF")
val myAudiobook = new Audiobook("Functional Programming in Scala", "Paul Chiusano and Runar Bjarnason", 2014, "John Doe")
println(myEbook.title) // Output: Scala Programming
println(myAudiobook.author) // Output: Paul Chiusano and Runar Bjarnason

Explanation: We define an abstract class Book representing common attributes of all types of books. Subclasses Ebook and Audiobook extend this class to include format and narrator respectively. This hierarchy allows for flexibility and extensibility in handling different types of books in the library management system. We demonstrate the instantiation of Ebook and Audiobook objects and access their attributes.

Conclusion

In this journey through Scala programming assignments, we've explored both functional and object-oriented paradigms. From filtering prime numbers to designing class hierarchies, these challenges encapsulate the essence of Scala's versatility and expressiveness. Remember, mastery comes not only from solving problems but also from understanding the underlying principles. At programminghomeworkhelp.com, we're committed to providing guidance and assistance in your Scala endeavors. Stay curious, keep coding, and unleash the full potential of Scala!