в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:14:47Z

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==Generic Operator Overloading==

<source lang="csharp">using System;
using System.ruponentModel;
class OperatorOverloading
{
static bool AreReferencesEqual<T>(T first, T second)
where T : class
{
return first == second;
}
static void Main()
{
string name = "J";
string intro1 = "My name is " + name;
string intro2 = "My name is " + name;
Console.WriteLine(intro1 == intro2);
Console.WriteLine(AreReferencesEqual(intro1, intro2));
}
}</source>

==Use multiple where clauses==

<p>Gen has two type arguments and both have a where clause.</p>

<source lang="csharp">using System;

class Gen<T, V> where T : class
where V : struct {
T ob1;
V ob2;

public Gen(T t, V v) {
ob1 = t;
ob2 = v;
}
}

class MainClass {
public static void Main() {
Gen<string, int> obj = new Gen<string, int>("test", 11);

// wrong because bool is not a reference type.
// Gen<bool, int> obj = new Gen<bool, int>(true, 11);

}
}</source>

==where T: struct==

<source lang="csharp">using System.Collections.Generic;
public class MyValueList<T> where T: struct
{
private List<T> imp = new List<T>();

public void Add( T v ) {
imp.Add( v );
}
}
public class MainClass
{
static void Main() {
MyValueList<int> intList = new MyValueList<int>();
intList.Add( 123 );
// CAN"T DO THIS.
// MyValueList<object> objList = new MyValueList<object>();
}
}</source>

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Csharp/CSharp Tutorial/Generic/where - История изменений

в 15:31, 26 мая 2010

Admin: 1 версия