AmineSagaama

val items = List("A", "B", "C")

//method reference
//Output : A,B,C
items.foreach(println)

//Output : A
items.foreach(item => if ("A".equals(item))
              println(item))

AmineSagaama

val items = Map("A" -> 100, "B" -> 200, "C" -> 300, "D" -> 400, "E" -> 500, "F" -> 600)

// The following approach shows how to use the Tuple syntax to display the key and value of each item
//Output : key: E, value: 500 key: F, value: 600 key: A, value: 100 key: B, value: 200 key: C, value: 300 key: D, value: 400
items.foreach(item => println(s"key: ${item._1}, value: ${item._2}"))

// To display the list of keys in the Map
//Output : E F A B C D
items.keys.foreach(println)

AmineSagaama

def foreach(f: (A) ⇒ Unit): Unit