static void Main()
{
var janet = new Person { FirstName = "Janet", LastName = "Jackson" };
Person[] persons1 = { new Person { FirstName = "Michael", LastName = "Jackson" }, janet };
Person[] persons2 = { new Person { FirstName = "Michael", LastName = "Jackson" }, janet };
if (persons1 != persons2)
Console.WriteLine("not the same reference");
if (!persons1.Equals(persons2))
Console.WriteLine("equals returns false - not the same reference");
if ((persons1 as IStructuralEquatable).Equals(persons2, EqualityComparer<Person>.Default))
{
Console.WriteLine("the same content");
}
var t1 = Tuple.Create<int, string>(1, "Stephanie");
var t2 = Tuple.Create<int, string>(1, "Stephanie");
if (t1 != t2)
Console.WriteLine("not the same reference to the tuple");
if (t1.Equals(t2))
Console.WriteLine("equals returns true");
TupleComparer tc = new TupleComparer();
if ((t1 as IStructuralEquatable).Equals(t2, tc))
{
Console.WriteLine("yes, using TubpleComparer");
}
}
static void SortPersons(Person[] persons)
{
Array.Sort(persons);
foreach (Person p in persons)
{
Console.WriteLine(p);
}
}
static void SortUsingPersonComparer(Person[] persons)
{
Array.Sort(persons,
new PersonComparer(PersonCompareType.FirstName));
foreach (Person p in persons)
{
Console.WriteLine(p);
}
}
static void CopyArrays()
{
Person[] beatles = {
new Person { FirstName="John", LastName="Lennon" },
new Person { FirstName="Paul", LastName="McCartney" }
};
Person[] beatlesClone = (Person[])beatles.Clone();
Person[] pc = beatles;
pc[0].FirstName = "F**k";
foreach (Person p in beatles)
{
Console.WriteLine("p.FirstName:{0},p.lastName:{1}", p.FirstName, p.LastName);
}
//now changed the clone array.
beatlesClone[0] = new Person() { FirstName = "Jack", LastName = "Deng" };
Console.WriteLine("Clone array1");
foreach(Person p in beatlesClone)
{
Console.WriteLine("p.FirstName:{0},p.lastName:{1}", p.FirstName , p.LastName);
}
Console.WriteLine("original array1");
foreach (Person p in beatles)
{
Console.WriteLine("p.FirstName:{0},p.lastName:{1}", p.FirstName, p.LastName);
}
beatlesClone[0].FirstName = "Jack";
beatlesClone[0].LastName = "Li";
Console.WriteLine("Clone array2");
foreach (Person p in beatlesClone)
{
Console.WriteLine("p.FirstName:{0},p.lastName:{1}", p.FirstName, p.LastName);
}
Console.WriteLine("original array2");
foreach (Person p in beatles)
{
Console.WriteLine("p.FirstName:{0},p.lastName:{1}", p.FirstName, p.LastName);
}
}
static void SimpleArrays()
{
Person[] myPersons = new Person[2];
myPersons[0] = new Person { FirstName = "Ayrton", LastName = "Senna" };
myPersons[1] = new Person { FirstName = "Michael", LastName = "Schumacher" };
Person[] myPersons2 =
{
new Person { FirstName="Ayrton", LastName="Senna"},
new Person { FirstName="Michael", LastName="Schumacher"}
};
}