C# 数组的交集、差集、并集
C# 数组的交集、差集、并集
工作中经常会用这方面的知识来检查那些字段是必须输入的,那些是禁止输入。
1 using System; 2 using System.Collections.Generic; 3 using System.Linq; 4 using System.Text; 5 6 namespace Collection 7 { 8 class Program 9 { 10 static void Main(string[] args) 11 { 12 int[] x = { 6,7,8,9,10}; 13 int[] y = { 4,5,6,7,8}; 14 15 var z1 = x.Except(y); 16 Console.WriteLine("Except: {0}",z1.Count()); 17 foreach (var i in z1) 18 { 19 Console.Write(i + " "); 20 } 21 22 var z2 = x.Intersect(y); 23 Console.WriteLine("\nIntersect:{0}",z2.Count()); 24 foreach (var i in z2) 25 { 26 Console.Write(i+" "); 27 } 28 29 var z3 = x.Union(y); 30 Console.WriteLine("\nUnion:{0}",z3.Count()); 31 foreach (var i in z3) 32 { 33 Console.Write(i + " "); 34 } 35 Console.ReadKey(); 36 } 37 } 38 }