C#

PIEBALDconsult wrote:

Therefore == == Equals !

string interned1 = "hello";
string interned2 = "hello";
string notinterned = new String("hello".ToCharArray());
string interned4 = string.Intern(notinterned);
Console.WriteLine(RuntimeHelpers.GetHashCode(interned1));
Console.WriteLine(RuntimeHelpers.GetHashCode(interned2));
Console.WriteLine(RuntimeHelpers.GetHashCode(notinterned));
Console.WriteLine(RuntimeHelpers.GetHashCode(interned4));

58225482
58225482
54267293
58225482

 static void Main(string[] args)
 {
     string strTest1 = "This is a test";
     string strTest2 = "This is a second test";

     Console.WriteLine("strTest1 == strTest2 : {0}", strTest1 == strTest2);
     Console.WriteLine("strTest1 == \"This is a test\" : {0}", strTest1 == "This is a test");
     Console.WriteLine("strTest1.Equals(strTest2) : {0}", strTest1.Equals(strTest2));
     Console.WriteLine("strTest1.Equals(\"This is a test\") : {0}", strTest1.Equals("This is a test"));
     Console.ReadLine();
}

strTest1 == strTest2 : False
strTest1 == "This is a test" : True
strTest1.Equals(strTest2) : False
strTest1.Equals("This is a test") : True

Nagy Vilmos wrote:

s1 == s2 just returns true if they are the same object

Luc Pattyn

Have a look at my entry for the lean-and-mean competition; please provide comments, feedback, discussion, and don’t forget to vote for it! Thank you.