Ejemplo n.º 1
0
        static void testList()
        {
            List <person> persons = new List <person>(new person[] { new person("John", 20),
                                                                     new person("White", 21), new person("Smith", 19), new person("Kitty", 22) });

            persons.ForEach(Console.WriteLine);//委托
            persons.Sort((p1, p2) =>
            {
                return(p1.age.CompareTo(p2.age));
            });
            Console.WriteLine("排序后:");
            persons.ForEach(p => { Console.WriteLine(p); });//莱姆达表达式
            Console.WriteLine("逆序后:");
            persons.Reverse();
            persons.ForEach(delegate(person p) { Console.WriteLine(p); });//匿名函数
            //删除
            Console.WriteLine();
            Console.WriteLine("删除年龄为21岁的,共删除了{0}个人", persons.RemoveAll(p => p.age == 21));
            persons.ForEach(Console.WriteLine);//委托
            Console.WriteLine();

            int index = persons.FindIndex(p => p.age < 21);

            Console.WriteLine("第一个年龄小于21岁的人是:{0}", persons[index]);
            index = persons.FindLastIndex(p => p.age < 21);
            Console.WriteLine("最后一个年龄小于21岁的人是:{0}", persons[index]);
            Console.WriteLine("查找到年龄为22岁的人是:{0}", persons.Find(p => p.age == 22));
            //所有人的年龄加一
            List <person> newPerson = persons.ConvertAll(p => new person(p.name, p.age + 1));

            Console.WriteLine("所有人的年龄加一");
            newPerson.ForEach(Console.WriteLine);
            //转换为只读list,加2岁
            Console.WriteLine("只读list");
            IReadOnlyList <person> readPerson = newPerson.AsReadOnly();

            foreach (person item in readPerson)
            {
                person one = new person(item);
                Console.WriteLine(one.AddAge(2));
            }
        }