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Question 1: Functional Programming Mastery
Problem:
Consider a list of integers. Write a Scala function that takes this list as input and returns a new list containing only the even numbers from the original list, sorted in ascending order.
Solution:
```scala
def filterAndSortEvenNumbers(numbers: List[Int]): List[Int] = {
numbers.filter(_ % 2 == 0).sorted
}
```
Explanation:
In this solution, we use the `filter` function to extract only the even numbers from the input list. The predicate `_ % 2 == 0` checks if a number is even. Then, we use the `sorted` method to sort the filtered list in ascending order. The resulting list contains only the even numbers from the original list, sorted as per the requirement.
Question 2: Pattern Matching Prowess
Problem:
Implement a function in Scala that takes a list of strings as input and returns the count of strings that contain the word "Scala" (case insensitive).
Solution:
```scala
def countScalaOccurrences(strings: List[String]): Int = {
strings.count(_.toLowerCase.contains("scala"))
}
```
Explanation:
This Scala function utilizes pattern matching to solve the problem. We first convert each string to lowercase using `toLowerCase` to ensure case insensitivity. Then, we use the `contains` method to check if the string contains the word "Scala". The `count` method is then employed to count the occurrences of such strings in the list, effectively fulfilling the requirement.
Conclusion
Mastering Scala requires practice and exposure to various problem-solving techniques. By tackling these master-level Scala questions and understanding their solutions, you're one step closer to becoming proficient in this powerful programming language. Remember, at ProgrammingHomeworkHelp.com, we're here to assist you every step of the way. Whether you need help with assignments, projects, or simply want to enhance your Scala skills, our expert team is ready to support you. So, don't hesitate to reach out and say, "do my Scala assignment," and let us help you excel in your Scala journey.
