要使用谓词定义的条件从HashSet中删除元素,代码如下-
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); } } }
输出结果
这将产生以下输出-
HashSet elements... 100 300 400 500 600 HashSet after removing element 100... 300 400 500 600
让我们看另一个例子-
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); } } }
输出结果
这将产生以下输出-
HashSet elements... 100 355 400 555 600 HashSet after removing some elements... 355 555