[C#/COMMON] is 연산자 : 상수 패턴(Constant Pattern) 사용하기

■ is 연산자에서 상수 패턴(Constant Pattern)을 사용하는 방법을 보여준다.

▶ 예제 코드 (C#)


using System;
using System.Drawing;

object[] sourceArray = { 1, null, 10, new Point(5, 10), new Rectangle(10, 10, 200, 200), string.Empty };

foreach(object source in sourceArray)
{
    if(source is null)
    {
        Console.WriteLine("NULL");
    }
    else if(source is 10)
    {
        Console.WriteLine("10");
    }
    else if(source is "")
    {
        Console.WriteLine("EMPTY STRING");
    }
    else
    {
        Console.WriteLine(source.ToString());
    }
}

using System;

using System.Drawing;

object[] sourceArray = { 1, null, 10, new Point(5, 10), new Rectangle(10, 10, 200, 200), string.Empty };

foreach(object source in sourceArray)

{

if(source is null)

{

Console.WriteLine("NULL");

}

else if(source is 10)

{

Console.WriteLine("10");

}

else if(source is "")

{

Console.WriteLine("EMPTY STRING");

}

else

{

Console.WriteLine(source.ToString());

}