수업 012 (04.21 2020) List<> 복습

1. App.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
 
namespace Study._013
{
    class App
    {
        public App()
        {
            // List<string> 객체 생성
            List<string> itemNameList = new List<string>();
 
            // 추가
            itemNameList.Add("장검");
            itemNameList.Add("단검");
            itemNameList.Add("활");
            itemNameList.Add("도끼");
 
            // 검색
            string targetItemName = "활";
            string foundItemName = "";
 
            #region for statement
            /*
            for (int i = 0; i < itemNameList.Count; i++)
            {
                if (itemNameList[i] == targetItemName)
                {
                    // Console.WriteLine("{0}을 찾았습니다.", targetItemName);
                    foundItemName = itemNameList[i];
                    break;
                }
            }
            if (foundItemName == "")
            {
                Console.WriteLine("{0}을 찾을 수 없습니다.", targetItemName);
            }
            else
            {
                Console.WriteLine("{0}을 찾았습니다.", foundItemName);
            }
            */
            #endregion
 
            #region foreach statement
            /*
            foreach (string itemName in itemNameList)
            {
                if (itemName == targetItemName)
                {
                    foundItemName == itemName;
                    break;
                }
            }
            */
            #endregion
 
            foundItemName = itemNameList.Find(x => x == targetItemName);
 
            if (string.IsNullOrEmpty(foundItemName))        // if(foundItemName == "" || foundItemName == null)
            {
                Console.WriteLine("{0}을 찾을 수 없습니다. \n", targetItemName);
            }
            else
            {
                Console.WriteLine("{0}을 찾았습니다. \n", foundItemName);
            }
 
            // 삭제
            itemNameList.Remove("활");
 
 
            // 출력
            for (int i = 0; i < itemNameList.Count; i++)
            {
                Console.WriteLine(itemNameList[i]);
            }
 
            Console.WriteLine("-------");
 
            foreach (string itemName in itemNameList)
            {
                Console.WriteLine(itemName);
            }
        }
    }
}

 

2. Result