码迷,mamicode.com
首页 > Windows程序 > 详细

C#集合之集(set)

时间:2017-05-10 14:36:09      阅读:328      评论:0      收藏:0      [点我收藏+]

标签:add   and   err   dia   子集   team   ast   重复元素   new   

  包含不重复元素的集合称为“集(set)”。.NET Framework包含两个集HashSet<T>和SortedSet<T>,它们都实现ISet<T>接口。HashSet<T>集包含不重复元素的无序列表,SortedSet<T>集包含不重复元素的有序列表。
  ISet<T>接口提供的方法可以创建合集,交集,或者给出一个是另一个集的超集或子集的信息。
    var companyTeams = new HashSet<string>() { "Ferrari", "McLaren", "Mercedes" };
    var traditionalTeams = new HashSet<string>() { "Ferrari", "McLaren" };
    var privateTeams = new HashSet<string>() { "Red Bull", "Lotus", "Toro Rosso", "Force India", "Sauber" };

    if (privateTeams.Add("Williams"))
      Console.WriteLine("Williams added");
    if (!companyTeams.Add("McLaren"))
      Console.WriteLine("McLaren was already in this set");

  IsSubsetOf验证traditionalTeams中的每个元素是否都包含在companyTeams中
    if (traditionalTeams.IsSubsetOf(companyTeams))
    {
      Console.WriteLine("traditionalTeams is subset of companyTeams");
    }
  IsSupersetOf验证traditionalTeams中是否有companyTeams中没有的元素
    if (companyTeams.IsSupersetOf(traditionalTeams))
    {
      Console.WriteLine("companyTeams is a superset of traditionalTeams");
    }
  Overlaps验证是否有交集
    traditionalTeams.Add("Williams");
    if (privateTeams.Overlaps(traditionalTeams))
    {
      Console.WriteLine("At least one team is the same with the traditional " +
      "and private teams");
    }
  调用UnionWith方法把新的 SortedSet<string>变量填充为companyTeams,privateTeams,traditionalTeams的合集
    var allTeams = new SortedSet<string>(companyTeams);
    allTeams.UnionWith(privateTeams);
    allTeams.UnionWith(traditionalTeams);

    Console.WriteLine();
    Console.WriteLine("all teams");
    foreach (var team in allTeams)
    {
      Console.WriteLine(team);
    }

    输出(有序的):
      Ferrari
      Force India
      Lotus
      McLaren
      Mercedes
      Red Bull
      Sauber
      Toro Rosso
      Williams
  每个元素只列出一次,因为集只包含唯一值。

  ExceptWith方法从ExceptWith中删除所有私有元素
    allTeams.ExceptWith(privateTeams);
    Console.WriteLine();
    Console.WriteLine("no private team left");
    foreach (var team in allTeams)
    {
      Console.WriteLine(team);
    }

C#集合之集(set)

标签:add   and   err   dia   子集   team   ast   重复元素   new   

原文地址:http://www.cnblogs.com/afei-24/p/6835365.html

(0)
(0)
   
举报
评论 一句话评论(0
登录后才能评论!
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!