标签:简单 this enum 方法 double int col ica 思路
1、简单应用,求数组的和,示例:
int[] numbers = { 5, 4, 1, 3, 9, 8, 6, 7, 2, 0 }; double numSum = numbers.Sum(); Console.WriteLine("The sum of the numbers is {0}.", numSum);
那么,求其中除以2等于0元素。按我平时的思路,就会这样写:
int[] numbers = {5, 4, 1, 3, 9, 8, 6, 7, 2, 0}; double numSum = numbers.Where(x=>x%2==0).Count();
其实,可以这样写的;
public static int Count<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate);
Enumerab类的扩张方法
Count<TSource>(this IEnumerable<TSource> source, Func<TSource, bool> predicate),
标签:简单 this enum 方法 double int col ica 思路
原文地址:http://www.cnblogs.com/zhangyuanbo12358/p/4356994.html