标签:++ list 设置 nbsp strong sim span arp tac
Person[] peopleArray = new Person[3] { new Person("张三", 15), new Person("李四", 18), new Person("王五", 21), }; People peopleList = new People(peopleArray); //第一种方法(foreach) foreach (Person p in peopleList) { Console.WriteLine(p.Name + "\t" + p.Age); } //第二种方法(while) IEnumerator enumeratorSimple = peopleList.GetEnumerator(); while (enumeratorSimple.MoveNext()) { Person p = enumeratorSimple.Current as Person; Console.WriteLine(p?.Name + "\t" + p?.Age); }
当我们试图给item变量赋值的时候,vs智能提示,因为是迭代变量,无法赋值,也就是说当前变量是只读的,不能赋值,那基于这种情况,我们怎么整呢?
其实,foreach已经为我们提供了解决此问题的方法:用ref 迭代变量来设置 stackalloc 数组中每个项的值,具体代码如下:
List<int> countList = new List<int>() {0, 1, 2, 3, 4, 5}; foreach (ref var item in countList) { item++; }
标签:++ list 设置 nbsp strong sim span arp tac
原文地址:https://www.cnblogs.com/yexiaoyanzi/p/12000577.html