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JSP (array)

Source: Internet
Author: User
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1. array list
Var arr = ["zx", "123", "4.7"];
Each array has the length attribute.

Var arr = [1, 5];
The empty element is undefeated.

Var arr = ["x +" + 1, 12.3];
The array element can be an expression.

Var arr = [[1, 2], "hello", "3.8"];
Array elements can also be arrays.
[Html]
<Html>
<Script language = "javascript">
Var arr = [1, ["zxx" + 1, "li", 3.5], ["2", "@", "1"];
For (var I = 0; I <arr. length; I ++)
{
If (arr [I]. length)
{
For (var j = 0; j <arr [I]. length; j ++)
{
Alert (arr [I] [j]);
}
} Else
{
Alert (arr [I]);
}
}
 
 
</Script>
</Html>


2. Implement Arrays Using objects
[Html]
<Html>
<Script language = "javascript">
Function MyArray ()
{
This. length = arguments. length;
For (var I; I <this. length; I ++)
{
This [I] = arguments [I];
}
}
 
Var str = "";
Var arr = new MyArray (4, 3.5, "abo ");
For (var I = 0; I <arr. length; I ++)
{
Str + = arr [I] + "\ n ";
}
Alert (str );
 
 
Function MyArray2 (size)
{
This. length = size;
For (var I = 0; I <size; I ++)
{
This [I] = "";
}
}
Var arr2 = new MyArray2 (2 );
Arr [0] = 3;
Arr [1] = "ba ";
Arr [2] = 4;
 
Var x, str = "";
For (x in arr)
{
Str + = x + ":" + arr [x] + "\ n ";
}
 
Alert (str );
</Script>
</Html>

[Html]
<Html>
<Script language = "javascript">
Function MyArray ()
{
This. length = arguments. length;
For (var I; I <this. length; I ++)
{
This [I] = arguments [I];
}
}
 
Var str = "";
Var arr = new MyArray (4, 3.5, "abo ");
For (var I = 0; I <arr. length; I ++)
{
Str + = arr [I] + "\ n ";
}
Alert (str );
 
 
Function MyArray2 (size)
{
This. length = size;
For (var I = 0; I <size; I ++)
{
This [I] = "";
}
}
Var arr2 = new MyArray2 (2 );
Arr [0] = 3;
Arr [1] = "ba ";
Arr [2] = 4;
 
Var x, str = "";
For (x in arr)
{
Str + = x + ":" + arr [x] + "\ n ";
}
 
Alert (str );
</Script>
</Html>

3. Array object
* Array ()
[Html]
<Html>
<Script language = "javascript">
 
Var arr = new Array ();
Arr [0] = '1 ';
Arr [1] = 2;
 
Alert (arr. length );
</Script>
</Html>


* Array (4): determine the length

* Array (3.5, "abc", 3)
[Html]
<Html>
<Script language = "javascript">
 
Var arr = new Array ();
Arr [0] = '1 ';
Arr [1] = 2;
Arr [3] = 3;
Arr [4] = 0;
Arr. sort ();
Var str = "";
For (var x in arr)
{
Str + = x + ":" + arr [x] + "\ n ";
}
 
Alert (str );
 
Alert (arr. length );
</Script>
</Html>

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