Scala Map filter() method with example
Last Updated :
13 Aug, 2019
Improve
The filter() method is utilized to select all elements of the map which satisfies a stated predicate.
Method Definition: def filter(p: ((A, B))=> Boolean): Map[A, B]
Return Type: It returns a new map consisting all the elements of the map which satisfies the given predicate.
Example #1:
// Scala program of filter() // method // Creating object object GfG { // Main method def main(args:Array[String]) { // Creating map val m1 = Map("geeks" -> 5, "for" -> 3) // Applying filter method val result = m1.filter(x => x._1 == "geeks" && x._2 == 5) // Displays output println(result) } } |
Output:
Map(geeks -> 5)
Example #2:
// Scala program of filter() // method // Creating object object GfG { // Main method def main(args:Array[String]) { // Creating map val m1 = Map("geeks" -> 5, "for" -> 3) // Applying filter method val result = m1.filter(x => x._1 == "for" && x._2 == 5) // Displays output println(result) } } |
Output:
Map()
Here, an empty map is returned as none of the elements satisfy the stated predicate.
