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2010-05-26T15:31:53Z

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==A one-dimensional array.==

An array is a collection of variables of the same type that are referred to by a common name.
To declare a one-dimensional array, you will use this general form:

<source lang="csharp">type[ ] array-name = new type[size];</source>

==Array Declaration with initialization==

The general form for initializing a one-dimensional array is shown here:

<source lang="csharp">type[ ] array-name = { val1, val2, val3, ..., valN };</source>

==Array Inherited Members: get array type==

<source lang="csharp">using System;
class MainClass
{
static void Main()
{
int[] arr = new int[] { 15, 20, 5, 25, 10 };
Console.WriteLine("GetType() = {0}", arr.GetType());
}
}</source>
<pre class=codeResult>GetType() = System.Int32[]</pre>

==Array Inherited Members: GetLength(0)==

<source lang="csharp">using System;
class MainClass
{
static void Main()
{
int[] arr = new int[] { 15, 20, 5, 25, 10 };
Console.WriteLine("GetLength(0) = {0}", arr.GetLength(0));
}
}</source>
<pre class=codeResult>GetLength(0) = 5</pre>

==Array Inherited Members: Rank and Length==

<source lang="csharp">using System;
class MainClass
{
static void Main()
{
int[] arr = new int[] { 15, 20, 5, 25, 10 };
Console.WriteLine("Rank = {0}, Length = {1}", arr.Rank, arr.Length);
}
}</source>
<pre class=codeResult>Rank = 1, Length = 5</pre>

==Declare the array and instantiate the array==

<source lang="csharp">using System;
class MainClass
{
static void Main()
{
int[] myIntArray;
myIntArray = new int[4];
for (int i = 0; i < 4; i++)
myIntArray[i] = i * 10;
for (int i = 0; i < 4; i++)
Console.WriteLine(i);
}
}</source>
<pre class=codeResult>0
1
2
3</pre>

==Declaring and Accessing an Array==

<source lang="csharp">class MainClass
{
static void Main()
{
string[] languages = new string[9]{"C#", "COBOL", "Java","C++", "Visual Basic", "Pascal"};
// Retrieve 5th item in languages array (Visual Basic)
string language = languages[4];
}
}</source>

==Initializing Anonymous Type Arrays==

<source lang="csharp">using System;
using System.Collections.Generic;
using System.Linq;
class Program
{
static void Main()
{
var worldCup2006Finalists = new[]{new
{
TeamName = "France",
Players = new string[]
{
"A", "B","C", "D",
}
},
new
{
TeamName = "Italy",
Players = new string[]
{
"Q", "W","E", "R",
}
}
};
Print(worldCup2006Finalists);
}
private static void Print<T>(IEnumerable<T> items)
{
foreach (T item in items)
{
Console.WriteLine(item);
}
}
}</source>

==Methods Defined by Array==

<source lang="csharp">public static int BinarySearch(Array a, object v)</source>

==System.Array is a base class for all arrays in C#==

Properties Defined by Array
Property
Meaning
public virtual bool IsFixedSize
Is the array fixed size or dynamic.(read-only property)
public virtual bool IsReadOnly
Is the array read-only. (read-only property).
public virtual bool IsSynchronized
Is the array safe for use in a multithreaded environment. (read-only property)
public int Length
The number of elements in the array. (read-only property)
public int Rank
The dimensions in the array. (read-only property)
public virtual object SyncRoot
A read-only property that contains the object that must be used to synchronize access to the array.

==Use for each loop to output elements in an array==

<source lang="csharp">using System;
class MainClass
{
public static void Main()
{
string s = "A B C D E";
char[] separators = {" "};
string[] words = s.Split(separators);

foreach (object obj in words)
Console.WriteLine("Word: {0}", obj);
}
}</source>
<pre class=codeResult>Word: A
Word: B
Word: C
Word: D
Word: E</pre>

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в 15:31, 26 мая 2010

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