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Remove elements from a HashSet with conditions defined by the predicate in C#
To remove elements from a HashSet with conditions defined by the predicate, the code is as follows −
Example
using System; using System.Collections.Generic; public class Demo { private static bool demo(int i) { return (i == 100); } public static void Main(String[] args) { HashSet<int> list = new HashSet<int>(); list.Add(100); list.Add(300); list.Add(400); list.Add(500); list.Add(600); Console.WriteLine("HashSet elements..."); foreach (int i in list) { Console.WriteLine(i); } Console.WriteLine(" "); list.RemoveWhere(demo); Console.WriteLine("HashSet after removing element 100..."); foreach (int i in list) { Console.WriteLine(i); } } }
Output
This will produce the following output −
HashSet elements... 100 300 400 500 600 HashSet after removing element 100... 300 400 500 600
Example
Let us see another example −
using System; using System.Collections.Generic; public class Demo { private static bool demo(int i) { return ((i % 10) == 0); } public static void Main(String[] args) { HashSet<int> list = new HashSet<int>(); list.Add(100); list.Add(355); list.Add(400); list.Add(555); list.Add(600); Console.WriteLine("HashSet elements..."); foreach (int i in list) { Console.WriteLine(i); } Console.WriteLine(" "); list.RemoveWhere(demo); Console.WriteLine("HashSet after removing some elements..."); foreach (int i in list) { Console.WriteLine(i); } } }
Output
This will produce the following output −
HashSet elements... 100 355 400 555 600 HashSet after removing some elements... 355 555
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