Scala Map keys() method with example
The keys() method is utilized to give an iterator over all the keys of the map.
Method Definition: def keys: Iterable[A]
Return Type: It returns an iterator over all the keys of the map.
Example #1:
// Scala program of keys() // method // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating map val m 1 = Map( "Beginner" - > 5 , "for" - > 3 , "cs" - > 2 ) // Applying keys method val result = m 1 .keys // Displays output println(result) } } |
Output:
Set(Beginner, for, cs)
Example #2:
// Scala program of keys() // method // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating map val m 1 = Map( "Beginner" - > 5 , "for" - > 3 , "Beginner" - > 5 ) // Applying keys method val result = m 1 .keys // Displays output println(result) } } |
Output:
Set(Beginner, for)
So, the identical keys are taken only once.