C#入门经典Lambda

Posted 2020-06-08

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Linq;
 4 using System.Text;
 5 
 6 namespace LambdaSample
 7 {
 8     class Program
 9     {
10         static void Main(string[] args)
11         {
12             int[] myIntArray = { 1,2, 3, 4, 5 };
13             //累加器计算数组总和 
14             int result = myIntArray.Aggregate((paramA, paramB) => paramA + paramB);
15             int result1 = myIntArray.Aggregate<int>((paramA, paramB) => paramA + paramB);
16             int result2 = myIntArray.Aggregate<int, int>(0, (paramA, paramB) => paramA + paramB);
17             //递归计算数组总和
18             int result3 = count(5);
19             Console.WriteLine("The Result is: " + result);
20             Console.WriteLine("The Result1 is: " + result1);
21             Console.WriteLine("The Result2 is: " + result2);
22             Console.WriteLine("The Result3 is: " + result3);
23 
24             string[] myStrArray = { "Admin", "Change", "ByPage" };
25             //字符串数组拼接 何问起
26             string strResult = myStrArray.Aggregate((paramA, paramB) => paramA + " " + paramB);
27             //字符串数组字符串总长度计算
28             int result4 = myStrArray.Aggregate<string, int>(0, (a, b) => a + b.Length);
29             //字符串数组拼接2，增加字符串"Some curries: "
30             string strResult1 = myStrArray.Aggregate<string, string>("Some curries: ", (a, b) => a + " " + b);
31             //字符串数组字符串总长度计算2  hovertree.com
32             int result5 = myStrArray.Aggregate<string, string, int>("Some curries: ", (a, b) => a + " " + b, a => a.Length);
33             Console.WriteLine("The StrResult is: " + strResult);
34             Console.WriteLine("The Result4 is: " + result4);
35             Console.WriteLine(strResult1);
36             Console.WriteLine("The Result5 is: " + result5);
37             Console.ReadKey();
38         }
39 
40         static int count(int n)
41         {
42             if (n == 1)
43             {
44                 return 1;
45             }
46             return n + count(n - 1);
47         }
48     }
49 }

转自：http://hovertree.com/h/bjaf/jf9yeju1.htm

参考：C# Lambda 实例代码 深入浅出Lambda表达式 C#泛型详细介绍

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