MyList - step 4

Foreach, Map and Filter

Exercise

Add the following methods to MyList

• foreach
• map
• filter

trait MyList[A]:
  ...
  def foreach(f: A => B): Unit
  def map[B](f: A => B): MyList[B]
  def filter(f: A => Boolean): MyList[A]

main

@main
def main(): Unit =
  val myList: MyList[Int] = MyList(1,2,3)

  myList.foreach(x => println(x + 2))
  println(myList.map(x => x * 2))
  println(myList.filter(x => x < 2))

// 3
// 4
// 5
// MyList(2, 4, 6)
// MyList(1)