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 elements using 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 elements using 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:
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