这篇文章介绍了C#集合之集(set)的用法,文中通过示例代码介绍的非常详细。对大家的学习或工作具有一定的参考借鉴价值,需要的朋友可以参考下
包含不重复元素的集合称为“集(set)”。.NET Framework包含两个集HashSet
ISet
var companyTeams = new HashSet() { "Ferrari", "McLaren", "Mercedes" }; var traditionalTeams = new HashSet () { "Ferrari", "McLaren" }; var privateTeams = new HashSet () { "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
var allTeams = new SortedSet(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); }
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