两个集合对比

在github上有个项目，本来是作为自己研究学习.net core的demo，没想到很多同学在看，还给了很多星，所以觉得应该升成3.0，整理一下，写成博分享给学习.net core的同学们。

项目名称：asp.netcoreexperiment

项目地址：https://github.com/axzxs2001/asp.netcoreexperiment

 

今天先分享几个对集合知识点。

两个集合对比代码：

github代码库（https://github.com/axzxs2001/asp.netcoreexperiment/tree/master/asp.netcoreexperiment/common/comparecollections）

 1         static void main(string[] args)
 2         {
 3             var leftkes = new list<string>() { "111111", "222222", "333333", "444444" };
 4             var rightkes = new list<string>() { "333333", "444444", "555555", "666666" };
 5 
 6             console.writeline("left集合");
 7             console.writeline(string.join(',', leftkes));
 8             console.writeline("-------------------------------------");
 9 
10             console.writeline("right集合");
11             console.writeline(string.join(',', rightkes));
12             console.writeline("-------------------------------------");
13 
14             console.writeline("left多的 ");
15             console.writeline(string.join(',', leftkes.except(rightkes)));
16             console.writeline("-------------------------------------");
17 
18             console.writeline("right多的 ");
19             console.writeline(string.join(',', rightkes.except(leftkes).tolist()));
20             console.writeline("-------------------------------------");
21 
22             console.writeline("left和right交集 ");
23             console.writeline(string.join(',', rightkes.intersect(leftkes)));
24             console.writeline("-------------------------------------");
25 
26             console.writeline("left和right并集 ");
27             console.writeline(string.join(',', leftkes.union(rightkes)));
28             console.writeline("-------------------------------------");
29 
30             console.writeline("left和right对称差集 ");
31             console.writeline(string.join(',', leftkes.union(rightkes).except(rightkes.intersect(leftkes))));
32             console.writeline("-------------------------------------");
33 
34         }

 

运行速度测试代码：

github代码库（https://github.com/axzxs2001/asp.netcoreexperiment/tree/master/asp.netcoreexperiment/common/csharp%e8%8e%b7%e5%8f%96%e4%b8%a4%e4%b8%aa%e9%9b%86%e5%90%88%e4%b8%ad%e7%9b%b8%e5%90%8c%e7%9a%84%e5%92%8c%e4%b8%8d%e5%90%8c%e7%9a%84%e7%bb%93%e6%9e%9c）

 1         static void test()
 2         {
 3             console.writeline("-------------------开始初始化集合-------------------");
 4             #region 制造数据
 5             var watch = new stopwatch();
 6             watch.start();
 7             var lista = new list<string>();
 8             var listb = new list<string>();
 9             for (int i = 0; i < 1000000; i++)
10             {
11                 var id = guid.newguid().tostring();
12                 lista.add(id);
13             }
14             listb.addrange(lista);
15             //制造b的差异数据
16             for (int i = 0; i < 10; i++)
17             {
18                 var tick = datetime.now.ticks;
19                 var random = new random((int)(tick & 0xffffffffl) | (int)(tick >> 32));
20                 var index = random.next(1, 100000);
21                 listb[index] = guid.newguid().tostring();
22             }
23             watch.stop();
24             timespan span = watch.elapsed;
25             console.writeline("制造数据总共花费{0}ms.", span.totalmilliseconds);
26             #endregion
27 
28             #region 比较
29             console.writeline("-------------------开始比较-------------------");
30             console.writeline("-------------------lista中交集外---------------------");
31             watch = new stopwatch();
32             watch.start();
33             var listd = lista.except(lista.intersect(listb));
34             watch.stop();
35             span = watch.elapsed;
36             console.writeline("lista中交集外 总共花费{0}ms.", span.totalmilliseconds);
37             foreach (var item in listd)
38             {
39                 console.writeline(item);
40             }
41             console.writeline("----------------------listb中交集外--------------------");
42             watch = new stopwatch();
43             watch.start();
44             var liste = listb.except(lista.intersect(listb));
45             watch.stop();
46             span = watch.elapsed;
47             console.writeline("listb中交集外 总共花费{0}ms.", span.totalmilliseconds);
48             foreach (var item in liste)
49             {
50                 console.writeline(item);
51             }
52             console.writeline("--------------lista和listb中交集外-------------------");
53             watch = new stopwatch();
54             watch.start();
55             var listf = lista.concat(listb).except(lista.intersect(listb));
56             watch.stop();
57             span = watch.elapsed;
58             console.writeline("lista和listb中交集外 总共花费{0}ms.", span.totalmilliseconds);
59             foreach (var item in listf)
60             {
61                 console.writeline(item);
62             }
63             #endregion
64         }

对比的运行时长结果：

我的配置是：