в 15:31, 26 мая 2010

2010-05-26T15:31:53Z

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2010-05-26T12:14:44Z

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==A generic method==

<source lang="csharp">using System;

class ArrayUtils {

public static bool isBigger<T>(T[] src, T[] target) {
// See if target array is big enough.
if(target.Length < src.Length+1)
return false;
return true;
}
}

class GenMethDemo {
public static void Main() {
int[] nums = { 1, 2, 3 };
int[] nums2 = new int[4];

// Operate on an int array.
bool b = ArrayUtils.isBigger(nums, nums2);

Console.WriteLine(b);

string[] strs = { "Generics", "are", "powerful."};
string[] strs2 = new string[4];

b = ArrayUtils.isBigger(strs, strs2);

Console.WriteLine(b);

}
}</source>
<pre class=codeResult>True
True</pre>

==A generic method: constrol the parameter==

<source lang="csharp">using System;

class ArrayUtils {

public static void print<T>(T e, T[] src) {
for(int i= 0;i<src.Length;i++){
Console.WriteLine(src[i]);
}
}
}

class MainClass {
public static void Main() {
int[] nums = { 1, 2, 3 };

ArrayUtils.print(99, nums);

Console.WriteLine();

string[] strs = { "Generics", "are", "powerful."};

ArrayUtils.print("in C#", strs);

// invalid
// ArrayUtils.copyInsert(0.01, nums);

}
}</source>
<pre class=codeResult>1
2
3
Generics
are
powerful.</pre>

==constrained method calls==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Runtime.rupilerServices;
public class MainClass
{
static string GetToString<T>(T input)
{
return input.ToString();
}
public static void Main()
{
Console.WriteLine(GetToString<int>(10));
}
}</source>
<pre class=codeResult>10</pre>

==Generic and non Generic compare==

<source lang="csharp">using System;
using System.Collections;
using System.Collections.Generic;
public class MainClass
{
public void NonGeneric( Stack stack ) {
foreach( object o in stack ) {
int number = (int) o;
Console.WriteLine( number );
}
}
public void Generic( Stack<int> stack ) {
foreach( int number in stack ) {
Console.WriteLine( number );
}
}
}</source>

==Generic Method Demo==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.ruponentModel;
class GenericMethodDemo
{
static List<T> MakeList<T> (T first, T second)
{
List<T> list = new List<T>();
list.Add (first);
list.Add (second);
return list;
}
static void Main()
{
List<string> list = MakeList<string>("Line 1", "Line 2");
foreach (string x in list)
{
Console.WriteLine(x);
}
}
}</source>

==Generic Method Reflection==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Text;
using System.ruponentModel;
using System.Reflection;
class GenericMethodReflection
{
public static void PrintTypeParameter<T>()
{
Console.WriteLine (typeof(T));
}
static void Main()
{
Type type = typeof(GenericMethodReflection);
MethodInfo definition = type.GetMethod("PrintTypeParameter");
MethodInfo constructed;
constructed = definition.MakeGenericMethod(typeof(string));
constructed.Invoke(null, null);
}
}</source>

==Multiple Argument Inference with value and object==

<source lang="csharp">using System;
using System.ruponentModel;
class MainClass
{
static void PrintType<T>(T first, T second)
{
Console.WriteLine(typeof(T));
}
static void Main()
{
PrintType(1, new object());
}
}</source>

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в 15:31, 26 мая 2010

Admin: 1 версия