C# | Check if a HashSet and a specified collection share common elements
A HashSet is an unordered collection of the unique elements. It is found in System.Collections.Generic namespace. It is used in a situation where we want to prevent duplicates from being inserted in the collection. As far as performance is concerned, it is better in comparison to the list.HashSet
Syntax:
mySet1.Overlaps(mySet2);
Where, mySet1 and mySet2 are HashSets.
Return Type: This method returns true if the both HashSets share at least one common element otherwise it returns false.
Below given are some examples to understand the implementation in a better way :
Example 1:
// C# code to Check if a HashSet and a// specified collection share common elementsusing System;using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a HashSet of strings HashSet<string> mySet1 = new HashSet<string>(); // Inserting elements in HashSet mySet1.Add("Geeks"); mySet1.Add("GeeksforGeeks"); mySet1.Add("GeeksClasses"); mySet1.Add("GeeksQuiz"); // Creating a HashSet of strings HashSet<string> mySet2 = new HashSet<string>(); // Inserting elements in HashSet mySet2.Add("DS"); mySet2.Add("C++"); mySet2.Add("Java"); mySet2.Add("JavaScript"); // Check if a HashSet and a specified // collection share common elements Console.WriteLine(mySet1.Overlaps(mySet2)); }} |
Output:
False
Example 2:
// C# code to Check if a HashSet and a// specified collection share common elementsusing System;using System.Collections.Generic; class GFG { // Driver code public static void Main() { // Creating a HashSet of integers HashSet<int> mySet1 = new HashSet<int>(); // Inserting elements in HashSet mySet1.Add(4); mySet1.Add(8); mySet1.Add(12); mySet1.Add(16); // Creating a HashSet of integers HashSet<int> mySet2 = new HashSet<int>(); // Inserting elements in HashSet mySet2.Add(4); mySet2.Add(8); mySet2.Add(15); mySet2.Add(20); // Check if a HashSet and a specified // collection share common elements Console.WriteLine(mySet1.Overlaps(mySet2)); }} |
Output:
True
Reference:
