수업 011 (04.20 2020) List<>

* List<type> 변수 = new List<type>();

ex) List<string> itemNameList = new List<string>();

* list.Add("");

* list[i] = "";

* list.Remove("");                 // List<T>에서 맨 처음 발견하는 특정 개체를 지움

* string 변수 = list.Find( x => x == "")

ex)

foundItemName = itemNameList.Find(x => x == targetItemName);

 

1. App.cs

using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Threading.Tasks;   namespace Study._012 {     class App     {         public App()         {             // 리스트 객체 생성             List<string> list = new List<string>();               // 값을 추가             list.Add("hong");               // 리스트의 길이             Console.WriteLine(list.Count);      // output: 1             Console.WriteLine();               // 인덱스로 접근해서 가져오거나 설정할수 있음             list[0] = "lim";               // index가 0보다 작은 경우 또는 index가 System.Collections.Generic.List`1.Count보다 크거나 같은 경우 (error)             // list[1] = "lim";               list.Add("jang");             Console.WriteLine(list.Count);      // output: 2             Console.WriteLine();               // for문으로 요소를 출력             for (int i = 0; i < list.Count; i++)             {                 Console.WriteLine(list[i]);             }             // output: lim jang             Console.WriteLine("---------");               foreach (string name in list)             {                 Console.WriteLine(name);             }             // output: same as for statement result             Console.WriteLine("---------");               // lim 문자열과 같은 요소를 찾기             string foundName = "";               foreach (string name in list)             {                 if (name == "lim")                 {                     // 찾았다                     foundName = name;                 }                 break;             }             Console.WriteLine("Found Name: {0} \n", foundName);               string foundName2 = list.Find(x => x == "lim");             Console.WriteLine("Found Name 2: {0} \n", foundName2);               list.Remove("lim");               foreach (string name in list)             {                 Console.WriteLine("Name: {0} \n", name);                 // output: Name: jang             }               Console.WriteLine("list.Count: {0} \n", list.Count);        //length             // output: list.Count: 1         }     } }

 

 

2. Result