в 09:19, 26 мая 2010

2010-05-26T09:19:12Z

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2010-05-26T08:14:36Z

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==Deleting Elements and Attributes: To remove an element or attribute from a document, use the delete operator as follows: delete elementOrAttribute==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){

var novel:XML = <BOOK ISBN="0000000000">
<TITLE>ActionScript</TITLE>
<AUTHOR>J, J</AUTHOR>
<PUBLISHER>Books Ltd</PUBLISHER>
</BOOK>;

trace(novel);
delete novel.@ISBN;
trace(novel);

}
}
}
</source>

==@ operator has the attribute() and attributes() methods for accessing attributes by name or as an XML list respectively.==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var movieList:XML = <movieList>
<listName>My favorite movies</listName>
<movie id="123">
<title>Titus</title>
<year>1999</year>
<director>J T</director>
</movie>
<movie id="456">
<title>Rushmore</title>
<year>1998</year>
<director>W A</director>
</movie>
<movie id="789">
<title>Hall</title>
<year>1977</year>
<director>Woody Allen</director>
</movie>
</movieList>;

movieList.movie[1].attribute("id"); // 456
movieList.movie[2].attributes(); // 789
//The preceding code is functionally identical to the following code:
movieList.movie[1].@id; // 456
movieList.movie[2].@*; // 789

}
}
}
</source>

==Reference third level tag value==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var fruits:XML = <fruits>
<fruit color="red">
<name>Apple</name>
</fruit>
<fruit color="orange">
<name>Orange</name>
</fruit>
<fruit color="green">
<name>Pear</name>
</fruit>
<fruit color="red">
<name>Watermelon</name>
</fruit>
</fruits>;

trace( fruits.fruit.(name == "Apple").@color );

}
}
}
</source>

==To access all of the attributes for a tag, you can use an asterisk==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var myXML:XML = <foo a="1" b="2" c="3" />;
trace(myXML.@*.toXMLString());
}
}
}
</source>

==Use a wildcard (*) with the @ operator to access all attributes of an element==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){

var fruit:XML = <fruit name="Apple" color="red" />;

trace( fruit.@*[0] );

trace( fruit.@*[1] );

trace( fruit.@*.length( ) );
}
}
}
</source>

==Use bracket to access an attribute by name, or when the attribute name contains characters not allowed in variable names==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){

var example:XML = <example bad-variable-name="yes" color12="blue" />;
var num:Number = 12;

trace( example.@["bad-variable-name"] );

trace( example.@["color" + num] );
}
}
}
</source>

==Use E4X to dot down to the particular element node, and then use the @ operator followed by the attribute"s name to access its value==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var fruit:XML = <fruit name="Apple" color="red" />;

trace( fruit.@color );

}
}
}
</source>

==Use E4X to total the prices of all of the elements with a price attribute==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var cart:XML = <cart>
<item price=".98">crayons</item>
<item price="3.29">pencils</item>
<group>
<item price=".48">blue pen</item>
<item price=".48">black pen</item>
</group>
</cart>;

var total:Number = 0;

for each ( var price:XML in cart..@price ) {
total += price;
}

trace( total );
}
}
}
</source>

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в 09:19, 26 мая 2010

Admin: 1 версия