static void Main(string[] args)
{
Console.WriteLine("**** Fun with System.Object ****");
Person p1 = new Person();
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("GetHashCode: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && o.Equals(p2))
{
Console.WriteLine("Same instance!");
}
Console.WriteLine();
Person p3 = new Person("Homer", "Simpson", 54);
Person p4 = new Person("Homer", "Simpson", 54);
Console.WriteLine("p3.ToString(): {0}", p3.ToString());
Console.WriteLine("p4.ToString(): {0}", p4.ToString());
Console.WriteLine("p3 = p4: {0}", p3.Equals(p4));
Console.WriteLine("Same hashCodes: {0}", p3.GetHashCode() == p4.GetHashCode());
Console.WriteLine();
p4.Age = 23;
Console.WriteLine("p3.ToString(): {0}", p3.ToString());
Console.WriteLine("p4.ToString(): {0}", p4.ToString());
Console.WriteLine("p3 = p4: {0}", p3.Equals(p4));
Console.WriteLine("Same hashCodes: {0}", p3.GetHashCode() == p4.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.ReadLine();
}
static void Main(string[] args)
{
Person p1 = new Person("Jimmy");
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash Code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine(p2.GetHashCode() + " = " + p1.GetHashCode());
Console.WriteLine("Same instance!\n");
}
// Clone() вызывает метод protected MemberwiseClone()
// но если Person содержит свойства или поля ссылочного типа, то метод MemberwiseClone()
// копировал бы ссылки на эти объекты (т.е. создавал поверхностную копию)
Person p3 = p1.Clone() as Person;
if (p3 != null)
{
Console.WriteLine(p1.Name + " = " + p3.Name);
}
Console.ReadLine();
}
public static void Main(string[] args)
{
Console.WriteLine("Objrect Over rides!");
Person p1 = new Person("Homer", "Simposon", 50, "129023-80");
Person p2 = new Person("Homer", "Simposon", 50, "129023-80");
// GET Stringified version of objects
Console.WriteLine($"ToString : {p1.ToString()}");
Console.WriteLine($"ToString : {p2.ToString()}");
Console.WriteLine($"Hash Code {p1.GetHashCode()}");
Console.WriteLine($"Type: {p1.GetType()}");
// Test overridden Equals
Console.WriteLine($"p1= p2? : {p1.Equals(p2)}");
// Test hash codes
// still using the hash of ssn
Console.WriteLine($"Same hash codes {p1.GetHashCode()==p2.GetHashCode()}");
// change age of p2 and test again
p2.Age = 45;
Console.WriteLine("ToString {0}:", p1.ToString());
Console.WriteLine($"ToString : {p2.ToString()}");
Console.WriteLine($"p1= p2? : {p1.Equals(p2)}");
Console.WriteLine($"Same hash codes {p1.GetHashCode() == p2.GetHashCode()}");
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
// NOTE: We want these to be identical to test
// the Equals() and GetHashCode() methods.
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test Overridden Equals()
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// Test hash codes.
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and test again.
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.ReadLine();
}
private static void TestModifiedClass()
{
// NOTE: we want these to be identical to test
// the Equals() and GetHashCode() methods.
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine();
// Test overriden Equals().
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// test hashcodes
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and repeat the tests
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine();
// Test overriden Equals().
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// test hashcodes
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
}
static void Main(string[] args)
{
Console.WriteLine("*** Fun with System.Object ***");
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
Console.WriteLine("p1.ToString: {0}", p1.ToString());
Console.WriteLine("p2.ToString: {0}", p2.ToString());
Console.WriteLine("P1 = P2?: {0}", p1.Equals(p2));
Console.WriteLine("Same Hash Codes ?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
p2.Age = 42;
Console.WriteLine("p1.ToString: {0}", p1.ToString());
Console.WriteLine("p2.ToString: {0}", p2.ToString());
Console.WriteLine("P1 = P2?: {0}", p1.Equals(p2));
Console.WriteLine("Same Hash Codes ?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
MembersOfObjects();
//Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2 ?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}",
p1.GetHashCode() == p2.GetHashCode());
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 p2 ?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}",
p1.GetHashCode() == p2.GetHashCode());
StaticMethodsOfObject();
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("*** Fun With System.Object\n ***");
// NOTE: Those gotta be indentical to test the
// Equals() and GetHash() methods
Person p1 = new Person("Jason", "Meow", 18);
Person p2 = new Person("Jason", "Meow", 18);
// Get stringified versions of objects
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test the overridden Equals()
Console.WriteLine("p1 = p2? : {0}", p1.Equals(p2));
// Test hash codes
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
// Change the age of p2 and test again
p2.Age = 19;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2? : {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
Person p4 = new Person();
// Use inherited members of System.Object.
Console.WriteLine("ToString: {0}", p4.ToString());
Console.WriteLine("Hash Code: {0}", p4.GetHashCode());
Console.WriteLine("type: {0}", p4.GetType());
// Make some other references to p1.
Person p3 = p4;
object o = p3;
// Are the references pointing to the same object in memory?
if (o.Equals(p4) && p3.Equals(o))
{
Console.WriteLine("Same instance!");
}
Console.WriteLine();
// NOTE: We want these to be identical to test
// the Equals() and GetHashCode() methods.
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test overridden Equals().
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// Test overridden Equals()
Console.WriteLine("p1 = p2: {0}", p1.Equals(p2));
// Test hash codes.
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and test again.
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes? {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.ReadKey();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
//Person p1 = new Person();
////inherited members of System.Object
//Console.WriteLine("ToString: {0}", p1.ToString());
//Console.WriteLine("Hash code: {0}", p1.GetHashCode());
//Console.WriteLine("Type: {0}", p1.GetType());
//// Make some references to p1.
//Person p2 = p1;
//object o = p2;
//// Are the references pointing to the same object in memory?
//if (o.Equals(p1) && p2.Equals(o))
//{
// Console.WriteLine("Same instnce!");
//}
//Console.ReadLine();
// NOTE: We want these to be identical to test
// the Equals() and GetHashCode() methods.
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test overridden Equals().
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// Test hash codes.
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and test again.
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.ReadLine();
StaticMembersOfObject();
}
public static void Main(string[] args)
{
var person = new Person();
Console.WriteLine("ToString: {0}", person.ToString());
Console.WriteLine("Hash Code: {0}", person.GetHashCode());
Console.WriteLine("Type: {0}", person.GetType());
Person person2 = person;
object obj = person;
//Are the references pointing to the same object in memory?
if (obj.Equals(person) && person2.Equals(obj))
{
Console.WriteLine("Same Instance");
var pers1 = new Person("Homer", "Simpson", 50);
var pers2 = new Person("Homer", "Simpson", 50);
Console.WriteLine("pers1.ToString() = {0}", pers1.ToString());
Console.WriteLine("pers2.ToString() = {0}", pers2.ToString());
Console.WriteLine("pers1 = pers2: {0}", pers1.Equals(pers2));
Console.WriteLine("Same hash codes? : {0}", pers1.GetHashCode() == pers2.GetHashCode());
Console.ReadLine();
}
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("****** Fun with System.Object *****\n");
Person p1 = new Person();
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same instance!");
}
Person p3 = new Person("Sally", "Jones", 4);
Person p4 = new Person("Sally", "Jones", 4);
Console.WriteLine("P3 and P4 have same state: {0}", object.Equals(p3, p4));
Console.WriteLine("P3 nad P4 are pointing to same object: {0}", object.ReferenceEquals(p3, p4));
Console.ReadLine();
}
public static void Main (string[] args)
{
var person = new Person ();
Console.WriteLine ("ToString: {0}", person.ToString ());
Console.WriteLine ("Hash Code: {0}", person.GetHashCode ());
Console.WriteLine ("Type: {0}", person.GetType ());
Person person2 = person;
object obj = person;
//Are the references pointing to the same object in memory?
if (obj.Equals (person) && person2.Equals (obj)) {
Console.WriteLine("Same Instance");
var pers1 = new Person("Homer", "Simpson", 50);
var pers2 = new Person("Homer", "Simpson", 50);
Console.WriteLine("pers1.ToString() = {0}",pers1.ToString());
Console.WriteLine("pers2.ToString() = {0}",pers2.ToString());
Console.WriteLine("pers1 = pers2: {0}", pers1.Equals(pers2));
Console.WriteLine("Same hash codes? : {0}", pers1.GetHashCode() == pers2.GetHashCode());
Console.ReadLine();
}
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("****** Fun with System.Object ******\n");
Person p1 = new Person();
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
// Make some other references to p1.
Person p2 = p1;
object o = p2;
// Are the references poiting to the same object in memory?
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same instance!");
}
Console.WriteLine();
TestModifiedClass();
// Static members of system.object
Person p3 = new Person("Sally", "Jones", 4);
Person p4 = new Person("Sally", "Jones", 4);
Console.WriteLine("\np3 and p4 have the same state: {0}", p3.Equals(p4));
Console.WriteLine("p3 and p4 are pointing to the same object: {0}", object.ReferenceEquals(p3, p4));
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
////use inherited members of System.Object...
//Console.WriteLine("ToString: {0}", p1.ToString());
//Console.WriteLine("Hash Code: {0}", p1.GetHashCode());
//Console.WriteLine("Type: {0}", p1.GetType());
////make some other refs to p1
//Person p2 = p1;
//object o = p2;
////are these refs pointing to the same obj in memory?
//if (o.Equals(p1) && p2.Equals(o))
//{
// Console.WriteLine("Same instance!");
//}
//make 2 identical Persons to test Equals() and GetHashCode()
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
//get stringified versions of those objs
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
//test overriden Equals()
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
//test hash codes
Console.WriteLine("same hash codes?: {0}", p1.GetHashCode()==
p2.GetHashCode());
Console.WriteLine();
//change age of p2 and retest
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("same hash codes?: {0}", p1.GetHashCode() ==
p2.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.ReadLine();
}
static void Main(string[] args)
{
Person p1 = new Person();
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash Code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same instance");
}
Person pNull = null;
Console.WriteLine();
Console.WriteLine("is pNull a person {0}", pNull is Person);
Console.WriteLine("is p1 equal to null {0}", p1.Equals(null));
Console.WriteLine("is empty string equal to null {0}", "" == null);
Console.WriteLine();
Person p11 = new Person("Homer", "Simpson", 50);
Person p12 = new Person("Homer", "Simpson", 50);
Console.WriteLine("ToString: {0}", p11.ToString());
Console.WriteLine("p11.Hash Code: {0}", p11.GetHashCode());
Console.WriteLine("p12.Hash Code: {0}", p12.GetHashCode());
Console.WriteLine("is p11 equal to p12 {0}", p11.Equals(p12));
p12.Age = 45;
Console.WriteLine("is p11 equal to p12 {0}", p11.Equals(p12));
Console.WriteLine("p11.Hash Code: {0}", p11.GetHashCode());
Console.WriteLine("p12.Hash Code: {0}", p12.GetHashCode());
Console.WriteLine();
Console.WriteLine("=> static object methods");
Person p3 = new Person("Sally", "Jones", 4);
Person p4 = new Person("Sally", "Jones", 4);
Console.WriteLine("object.Equals {0}", object.Equals(p3, p4));
Console.WriteLine("object.ReferenceEquals {0}", object.ReferenceEquals(p3, p4));
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
// 说明:我们希望这些都一致,以便测试Equals()和GetHashCode()方法
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// 获取对象的字符串化版本
Console.WriteLine("p1.ToString()={0}", p1.ToString());
Console.WriteLine("p2.ToString()={0}", p2.ToString());
// 测试重写的Equals()
Console.WriteLine("p1=p2?:{0}", p1.Equals(p2));
// 测试散列码
Console.WriteLine("Same hash codes?:{0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// 修改p2的年龄并再次测试
p2.Age = 45;
Console.WriteLine("p1.ToString()={0}", p1.ToString());
Console.WriteLine("p2.ToString()={0}", p2.ToString());
Console.WriteLine("p1=p2?:{0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?:{0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.ReadLine();
//Person p1 = new Person("Homer", "Simpson", 50);
//// 使用System.Object的继承成员
//Console.WriteLine("ToString:{0}", p1.ToString());
//Console.WriteLine("Hash code:{0}", p1.GetHashCode());
//Console.WriteLine("Type:{0}", p1.GetType());
//// 让其他引用指向p1
//Person p2 = p1;
//object o = p2;
//if (o.Equals(p1) && p2.Equals(o))
//{
// Console.WriteLine("Same instance!");
//}
//Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun eith System.Object *****/n");
// Person p1 = new Person();
//
// Console.WriteLine("ToString: {0}",p1.ToString());
// Console.WriteLine("Hash code: {0}",p1.GetHashCode());
// Console.WriteLine("Type: {0}", p1.GetType());
//
// Person p2 = p1;
// object o = p2;
//
// if (o.Equals(p1) && p2.Equals(o))
// {
// Console.WriteLine("Same instance1");
// }
Person p1 = new Person("Homer", "Simpson", 50, "111-11-1111");
Person p2 = new Person("Homer", "Simpson", 50, "111-11-1111");
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 == p2 ?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 == p2 ? : {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine("Static methods from System.Object()");
Person p3 = new Person("Sally", "Jones", 4);
Person p4 = new Person("Sally", "Jones", 4);
Console.WriteLine("P3 and P4 have the same state: {0}", object.Equals(p3, p4));
Console.WriteLine("P3 and P4 are pointing to the same object: {0}", object.ReferenceEquals(p3, p4));
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("**** Fun with System.Object ****\n");
Person a1 = new Person("Piter", "Byork", 32);
//Использовать наследованные члены System.Object
Console.WriteLine("To String: {0}", a1.ToString());
Console.WriteLine("Hash code: {0}", a1.GetHashCode());
Console.WriteLine("Type: {0}", a1.GetType());
//Создать другую ссылку на р1
Person a2 = a1;
object o = a2;
//Указывают ли ссылки на один и тот же объект в памати?
if (o.Equals(a1) && o.Equals(a2))
{
Console.WriteLine("Same instance!");
}
Console.WriteLine("----------TESTS---------\n;");
//p1 и р2 идентичны! Для проверки методо Equals() и GetHashCode()
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
//Получить строковые версии объектов
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
//Проверить переопределённый метод Equals();
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
//Проверить хеш-коды
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
//Изменить возраст р2 и проверить снова
p2.personAge = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
SharedMembersOfObject();
Console.ReadLine();
}
static void ModifiedClass()
{
Console.ForegroundColor = ConsoleColor.Cyan;
Console.WriteLine("=> Testing Modified Person Class");
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
Console.WriteLine($"ToString: {p1.ToString()} / {p2.ToString()}");
Console.WriteLine($"Equality: {p1.Equals(p2)}");
Console.WriteLine($"HashCode: {p1.GetHashCode()} / {p2.GetHashCode()}");
Console.WriteLine($"Same HashCode: {p1.GetHashCode() == p2.GetHashCode()}");
p2.Age = 45;
Console.WriteLine($"ToString: {p1.ToString()} / {p2.ToString()}");
Console.WriteLine($"Equality: {p1.Equals(p2)}");
Console.WriteLine($"HashCode: {p1.GetHashCode()} / {p2.GetHashCode()}");
Console.WriteLine($"Same HashCode: {p1.GetHashCode() == p2.GetHashCode()}");
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
//Person p1 = new Person();
//Console.WriteLine("ToString: {0}", p1.ToString());
//Console.WriteLine("Hash code: {0}", p1.GetHashCode());
//Console.WriteLine("Type: {0}", p1.GetType());
//Person p2 = p1;
//object o = p2;
//if(o.Equals(p1) && p2.Equals(o))
//{
// Console.WriteLine("Same instance!");
//}
Person p1 = new Person("Homer", "Simpson", 50, "12345");
Person p2 = new Person("Homer", "Simpson", 50, "12345");
Console.WriteLine($"p1.ToString() = {p1.ToString()}");
Console.WriteLine($"p2.ToString() = {p2.ToString()}");
Console.WriteLine($"p1 = p2?: {p1.Equals(p2)}");
Console.WriteLine($"Same hash codes?: {p1.GetHashCode() == p2.GetHashCode()}");
Console.WriteLine();
p2.Age = 45;
Console.WriteLine($"p1.ToString() = {p1.ToString()}");
Console.WriteLine($"p2.ToString() = {p2.ToString()}");
Console.WriteLine($"p1 = p2?: {p1.Equals(p2)}");
Console.WriteLine($"Same hash codes?: {p1.GetHashCode() == p2.GetHashCode()}");
Person p3 = new Person("Sally", "Jones", 4, "43562");
Person p4 = new Person("Sally", "Jones", 4, "43562");
Console.WriteLine($"P3 and P4 have same state: {object.Equals(p3, p4)}");
Console.WriteLine($"P3 and P4 are pointing to the same object: {object.ReferenceEquals(p3, p4)}");
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
//Person p1 = new Person();
//// Use inherited members of System.Object
//Console.WriteLine("ToString: {0}", p1.ToString());
//Console.WriteLine("Hash code {0}", p1.GetHashCode());
//Console.WriteLine("Type {0}:", p1.GetType());
//// Make some other references to p1.
//Person p2 = p1;
//object o = p2;
//// Are the references pointing to the same object in memory?
//if (o.Equals(p1) && p2.Equals(o))
// Console.WriteLine("Same instance!");
Console.WriteLine("Testing modified Person class\n");
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test overriden Equals().
Console.WriteLine($"p1 = p2?: {p1.Equals(p2)}");
// Test hash codes.
Console.WriteLine($"Same hash codes?: {p1.GetHashCode() == p2.GetHashCode()}");
// Change age of p2 and test again:
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine($"p1 = p2?: {p1.Equals(p2)}");
Console.WriteLine($"Same hash codes?: {p1.GetHashCode() == p2.GetHashCode()}");
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("fun with system.object");
Person p1 = new Person();
Console.WriteLine(p1.ToString());
Console.WriteLine(p1.GetHashCode());
Console.WriteLine(p1.GetType());
Console.ReadLine();
}
static void Main(string[] args)
{
try
{
Person p1 = new Person("Suri", "Thor", 50);
Person p2 = new Person("Steve", "Rogers", 55);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test overridden Equals().
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// Test hash codes.
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and test again.
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.ReadLine();
// Static members of System.Object.
Person p3 = new Person("Sally", "Jones", 4);
Person p4 = new Person("Sally", "Jones", 4);
Console.WriteLine("P3 and P4 have same state: {0}", Equals(p3, p4));
Console.WriteLine("P3 and P4 are pointing to same object: {0}", ReferenceEquals(p3, p3));
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
Person p1 = new Person("Tushar", "Mohite", 23);
Person p2 = new Person("Tushar", "Mohite", 23);
// Get StringField version of objects.
Console.WriteLine("p1.ToString() : {0}", p1.ToString());
Console.WriteLine("p2.ToString() : {0}", p2.ToString());
// Test overriden Equals().
Console.WriteLine("p1 = p2 ? : {0}", p1.Equals(p2));
// Test Hash Codes
Console.WriteLine("Same hash codes : {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and test again
p2.Age = 46;
Console.WriteLine("p1.ToString() : {0}", p1.ToString());
Console.WriteLine("p2.ToString() : {0}", p2.ToString());
Console.WriteLine("p1 = p2 ? : {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes : {0}", p1.GetHashCode() == p2.GetHashCode());
// Static members of System.Object.
Console.WriteLine();
Person p3 = new Person("Sally", "Jones", 4);
Person p4 = new Person("Sally", "Jones", 4);
Console.WriteLine("P3 and P4 have same state: {0}", object.Equals(p3, p4));
Console.WriteLine("P3 and P4 are pointing to same object: {0}",
object.ReferenceEquals(p3, p4));
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
// ПРИМЕЧАНИЕ: эти объекты идентичны для проверки
// методов Equals() и GetHashCode().
Person pl = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Получить строковые версии объектов.
Console.WriteLine("pl.ToString() = {0}", pl.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Проверить переопределенный метод Equals().
Console.WriteLine("pl =p2?: {0}", pl.Equals(p2));
// Проверить хеш-коды.
Console.WriteLine("Samehashcodes?: {0}", pl.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Изменить возраст p2 и проверить снова.
p2.Age = 45;
Console.WriteLine("pl.ToString() = {0}", pl.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("pl =p2?: {0}", pl.Equals(p2));
Console.WriteLine("Samehashcodes?: {0}", pl.GetHashCode() == p2.GetHashCode());
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
Console.WriteLine($"p1.ToString() = {p1.ToString()}");
Console.WriteLine($"p2.ToString() = {p2.ToString()}");
//Test overriding Equals()
Console.WriteLine($"p1 = p2?: {p1.Equals(p2)}");
//Test hash codes
Console.WriteLine($"Same hash codes?: {p1.GetHashCode() == p2.GetHashCode()}");
Console.WriteLine();
//Change age of p2 and test again
p2.Age = 45;
Console.WriteLine($"p1.ToString() = {p1.ToString()}");
Console.WriteLine($"p2.ToString() = {p2.ToString()}");
Console.WriteLine($"p1 = p2?: {p1.Equals(p2)}");
Console.WriteLine($"Same hash codes?: {p1.GetHashCode() == p2.GetHashCode()}");
}
static void Main(string[] args)
{
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.Read();
}
static void Main(string[] args)
{
Person p1 = new Person();
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same instance!");
}
Console.ReadLine();
}
public static void Main (string[] args)
{
var person = new Person ();
Console.WriteLine ("ToString: {0}", person.ToString ());
Console.WriteLine ("Hash Code: {0}", person.GetHashCode ());
Console.WriteLine ("Type: {0}", person.GetType ());
Person person2 = person;
object obj = person;
//Are the references pointing to the same object in memory?
if (obj.Equals (person) && person2.Equals (obj)) {
Console.WriteLine("Same Instance");
}
Console.ReadLine();
}
public static void Main(string[] args)
{
Console.WriteLine("Fun with System.Object");
Person p1 = new Person();
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash Code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
Person p2 = p1;
object o1 = p2;
if (o1.Equals(p1) && p2.Equals(o1))
{
Console.WriteLine("Same Instance");
}
}
public static void Main(string[] args)
{
var person = new Person();
Console.WriteLine("ToString: {0}", person.ToString());
Console.WriteLine("Hash Code: {0}", person.GetHashCode());
Console.WriteLine("Type: {0}", person.GetType());
Person person2 = person;
object obj = person;
//Are the references pointing to the same object in memory?
if (obj.Equals(person) && person2.Equals(obj))
{
Console.WriteLine("Same Instance");
}
Console.ReadLine();
}
private static void Main(string[] args)
{
Console.WriteLine("***** Fun With System.Object *****");
var person = new Person("Sergeo", "Next", 45);
var person1 = new Person("Sergeo", "Next", 45);
// person1.Age = 40;
Console.WriteLine("person.ToString(): {0}", person);
Console.WriteLine("person1.ToString(): {0}", person1);
//Тестируем Equals
Console.WriteLine("person = person1 ? :{0}", person.Equals(person1));
//Проверяем хэш коды
Console.WriteLine("Same hash codes ? :{0}", person.GetHashCode() == person1.GetHashCode());
//Эквивалентность
Console.WriteLine("Poiting to same object ? :{0}", ReferenceEquals(person, person1));
Console.ReadLine();
}
static void Main(string[] args)
{
Console.WriteLine("Fun with System.Object");
Person p1 = new Person();
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same Instance");
}
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("GetHashCode: {0}", p1.GetHashCode());
Console.WriteLine("GetType: {0}", p1.GetType());
Console.ReadLine();
}
static void OrigMethods()
{
Console.ForegroundColor = ConsoleColor.Green;
Console.WriteLine("=> Original Methods");
Person p1 = new Person("David", "Audru", 35);
Console.WriteLine($"ToString: {p1.ToString()}");
Console.WriteLine($"ToString: {p1}");
Console.WriteLine($"Hash Code: {p1.GetHashCode()}");
Console.WriteLine($"Type: {p1.GetType()}");
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same instance!");
}
}
static void Main(string[] args)
{
Console.WriteLine("Fun with System.Object");
Person p1 = new Person("Homer", "Simpson", 50);
Person p4 = new Person("Homer", "Simpson", 50);
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("GetHash: {0}", p1.GetHashCode());
Console.WriteLine("GetType: {0}", p1.GetType());
Person p2 = p1;
object o = p2;
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same reference");
}
Console.WriteLine(object.Equals(p1, p4));
Console.WriteLine(object.ReferenceEquals(p1, p4));
Console.ReadKey();
}
static void Main(string[] args)
{
Console.WriteLine("***** Fun with System.Object *****\n");
Person p1 = new Person();
// Использовать унаследованне члены System.Object.
Console.WriteLine("ToString: {0}", p1.ToString());
Console.WriteLine("Hash code: {0}", p1.GetHashCode());
Console.WriteLine("Type: {0}", p1.GetType());
// Создать другую ссылку на p1.
Person p2 = p1;
object o = p2;
// Указывают ли ссылки на один и то же объект в памяти?
if (o.Equals(p1) && p2.Equals(o))
{
Console.WriteLine("Same instance!"); // Один и тот же экземпляр.
}
Console.ReadLine();
}
static void Main( string[] args )
{
Console.WriteLine("***** Fun with System.Object *****\n");
// NOTE: We want these to be identical to test
// the Equals() and GetHashCode() methods.
Person p1 = new Person("Homer", "Simpson", 50);
Person p2 = new Person("Homer", "Simpson", 50);
// Get stringified version of objects.
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
// Test Overridden Equals()
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
// Test hash codes.
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
// Change age of p2 and test again.
p2.Age = 45;
Console.WriteLine("p1.ToString() = {0}", p1.ToString());
Console.WriteLine("p2.ToString() = {0}", p2.ToString());
Console.WriteLine("p1 = p2?: {0}", p1.Equals(p2));
Console.WriteLine("Same hash codes?: {0}", p1.GetHashCode() == p2.GetHashCode());
Console.WriteLine();
StaticMembersOfObject();
Console.ReadLine();
}
