в 09:19, 26 мая 2010

2010-05-26T09:19:12Z

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2010-05-26T08:14:35Z

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==Access an element"s attributes using E4X attributes wildcard (@*)==



<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.@*);
}
}
}
</source>

==Accesses first attribute by using E4X"s attributes wildcard syntax==



<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.@*[0]);
}
}
}
</source>

==Accessing Attributes and Elements Whose Names Contain Reserved Characters: attribute( ), child( ), or [] operator.==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var saleEndsDate:XML = <DATE TIME-ZONE="PST">1, 2006</DATE>
//trace(saleEndsDate.@TIME-ZONE);
trace(saleEndsDate.attribute("TIME-ZONE"));
trace(saleEndsDate.@["TIME-ZONE"]);
}
}
}
</source>

==Adding New Attributes and Elements==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var novel:XML = <BOOK/>;

novel.@ISBN = "0000000000";
novel.TITLE = "ActionScript";
novel.AUTHOR = "J, J";
novel.PUBLISHER = "Books Ltd";
novel.SETTING.CITY = "Dublin";
novel.SETTING.COUNTRY = "Ireland";

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

==Assign the desired attributes the desired values==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var novel:XML = <BOOK/>;

novel.@ISBN = "0000000000";
novel.TITLE = "ActionScript";
novel.AUTHOR = "J, J";
novel.PUBLISHER = "Books Ltd";
novel.SETTING.CITY = "Dublin";
novel.SETTING.COUNTRY = "Ireland";

novel.SETTING.@CITY = "Dublin";
novel.SETTING.@COUNTRY = "Ireland";

trace(novel);

}
}
}
</source>

==Attributes in an XMLList can be accessed using the array-access operator ([]).==



<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.attributes()[0]);
}
}
}
</source>

==Changing an Attribute Value==



<source lang="java">

To change an XML attribute value, simply assign the attribute any new value in an assignment statement.
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>;

novel.@ISBN = "0684800713";

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

==Returns an XMLList that contains one XML instance==



<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.attribute("ISBN"));
}
}
}
</source>

==Returns an XMLList that contains one XML instance, representing the attribute, with variable-access syntax.==



<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.@ISBN);
}
}
}
</source>

==To access an element"s attributes: attributes()==



<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.attributes());
}
}
}
</source>

==To access the XML instance contained by the XMLList returned by novel.@ISBN==



<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.@ISBN[0]);
}
}
}
</source>

==To loop over all of the attributes of an element, use a for each loop.==



<source lang="java">

package{
import flash.display.Sprite;

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

for each ( var attribute:XML in fruit.attributes( ) ) {
trace( attribute.name( ) + " = " + attribute.toString( ) );
}
}
}
}
</source>

==Unusual behavior can be used to collect a group of attributes into a single attribute==



<source lang="java">

package{
import flash.display.Sprite;

public class Main extends Sprite{
public function Main(){
var books:XML = <BOOKS>
<BOOK ISBN="0000000000"/>
<BOOK ISBN="1111111111"/>
<BOOK ISBN="2222222222"/>
</BOOKS>;

var order:XML = <ORDER ITEMS=""/>;
order.@ITEMS = books.*.@ISBN;

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

==Use the name( ) method on the attribute reference to retrieve its name==



<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.attributes( )[1].name( ) );

}
}
}
</source>

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Flash / Flex / ActionScript/XML/attributes - История изменений

в 09:19, 26 мая 2010

Admin: 1 версия