FunctionsAndMethods.scala

object FunctionsAndMethods:

  // Exercise: Define a function named `multiplyAsFunction` that takes two integers and returns their product.
  // Use the `def` keyword.
  // [start: multiplyAsFunction]
  def multiplyAsFunction(x: Int, y: Int): Int = x * y
  // [end]

  // Exercise: Define a function named `multiplyAsValue` that takes two integers and returns their product.
  // Use the `val` keyword.
  // [start: multiplyAsValue]
  val multiplyAsValue: (Int, Int) => Int = (x, y) => x * y
  // [end]

  // Exercise: Define a class named `Multiplier` with a method named `multiply` that takes two integers and returns their product.
  // [start: Multiplier]
  class Multiplier:
    def multiply(x: Int, y: Int): Int = x * y
  // [end]

  // Exercise: Create a subclass of `Multiplier` named `MultiplierWithOffset` whose constructor requires an `offset` parameter.
  // Override the `multiply` method to add the `offset` to the product of the two input integers.
  // [start: MultiplierWithOffset]
  class MultiplierWithOffset(offset: Int) extends Multiplier:
    override def multiply(x: Int, y: Int): Int = super.multiply(x, y) + offset
  // [end]