Linq中的Take和Skip

来源:互联网 发布:seo的目的 编辑:程序博客网 时间:2024/05/17 03:34

原文:http://msdn.microsoft.com/zh-cn/library/bb503062(v=vs.110).aspx

http://msdn.microsoft.com/zh-cn/library/bb358985(v=vs.110).aspx

如果 count 小于等于零,则不枚举 source,并返回空的 IEnumerable<T>

Take<TSource> 和 Skip<TSource> 方法在功能上补充。 如果给定一个序列 coll 和一个整数 n,则连接 coll.Take(n) 和 coll.Skip(n) 的结果会生成与 coll 相同的序列。

 int[] grades = { 59, 82, 70, 56, 92, 98, 85 };            IEnumerable<int> topThreeGrades =                grades.OrderByDescending(grade => grade).Take(3);            Console.WriteLine("The top three grades are:");            foreach (int grade in topThreeGrades)            {                Console.WriteLine(grade);            }            /*             This code produces the following output:             The top three grades are:             98             92             85            */

int[] grades = { 59, 82, 70, 56, 92, 98, 85 };            IEnumerable<int> lowerGrades =                grades.OrderByDescending(g => g).Skip(3);            Console.WriteLine("All grades except the top three are:");            foreach (int grade in lowerGrades)            {                Console.WriteLine(grade);            }            /*             This code produces the following output:             All grades except the top three are:             82             70             59             56            */



1 0
原创粉丝点击