hashset scala
In Scala, the HashSet
class is a commonly used collection that implements an unordered set of elements. It is part of the Scala standard library and provides efficient operations for adding, removing, and checking membership of elements.
To use HashSet
in Scala, you first need to import it from the scala.collection.mutable
package:
import scala.collection.mutable.HashSet
Then, you can create an instance of HashSet
and add elements to it using the +=
operator:
val set = HashSet("apple", "banana", "orange")
set += "grape"
You can also remove elements from the set using the -=
operator:
set -= "banana"
To check if an element is present in the set, you can use the contains
method:
val containsOrange = set.contains("orange")
The HashSet
class in Scala provides a fast lookup time for checking membership and efficient addition and removal of elements. It is implemented using a hash table data structure, which allows for constant-time complexity on average for these operations.
Please let me know if you need any further assistance.