Remove key value from Map in Scala
The deletion of Scala map keys can be obtained by utilizing – operator. This operator is utilized to delete the set of keys of the map.
Syntax:
def -(elem1: A, elem2: A, elems: A*): Map[A, B]
It returns a new map containing all the elements of the given Map except the set of keys which are deleted using the above operator.
Example #1:
// Scala program of deleting // keys // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating a map val m 1 = Map( "Beginner" - > 5 , "for" - > 3 ) // Applying - operator val result = m 1 .-( "for" ) // Displays output println(result) } } |
Output:
Map(Beginner -> 5)
In above example here for key is deleted.
Example #2:
// Scala program of deleting // keys // Creating object object GfG { // Main method def main(args : Array[String]) { // Creating a map val m 1 = Map( "Beginner" - > 5 , "for" - > 3 , "cs" - > 2 ) // Applying - operator val result = m 1 .-( "for" , "Beginner" ) // Displays output println(result) } } |
Output:
Map(cs -> 2)
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