I've just started working on an
Adobe Flex project, and I've messing around with
E4X. I'm familiar with
Xpath 1.0 from working with
Konfabulator widgets, but it took me a while to get to grips with E4X. Most of what I learned, I got from
this website. So, I'll just go ahead and use some of the material from the site. Here's what I've learned so far. I'll be using the below XML as an example.
<?xml version="1.0"?>
<rdf>
<channel>
<title><![CDATA[Test file]]></title>
<link>http://www.sephiroth.it</link>
<description><![CDATA[A custom description of this document]]></description>
<language>en-us</language>
<items>
<item id="001">
<resource url="http://www.sephiroth.it/tutorials.php" />
<channel>FLASH-PHP</channel>
<author email="alex@alex.com">
<name>Alessandro</name>
</author>
</item>
<item id="002">
<resource url="http://www.sephiroth.it/tutorials/flashPHP/E4X" />
<channel>Flash 9</channel>
<author email="mich@alex.com">
<name>Michael</name>
</author>
</item>
<item id="003">
<resource url="http://www.sephiroth.it/tutorials/flashPHP/scrollRect" />
<channel>Flash 8</channel>
<author email="fk@alex.com">
<name>Frank</name>
</author>
</item>
</items>
</channel>
</rdf>
httpResult.lastResult..item will give all the items in XML fromat:
<item id="001">
<resource url="http://www.sephiroth.it/tutorials.php" />
<channel>FLASH-PHP</channel>
<author email="alex@alex.com">
<name>Alessandro</name>
</author>
</item>
<item id="002">
<resource url="http://www.sephiroth.it/tutorials/flashPHP/E4X" />
<channel>Flash 9</channel>
<author email="mich@alex.com">
<name>Michael</name>
</author>
</item>
<item id="003">
<resource url="http://www.sephiroth.it/tutorials/flashPHP/scrollRect" />
<channel>Flash 8</channel>
<author email="fk@alex.com">
<name>Frank</name>
</author>
</item>
httpResult.lastResult..name.text() will give all names in normal text, without the XML formatting. That's what the .text() is for.
AlessandroMichaelFrank
httpResult.lastResult..item.@id will give the ids of every item:
001002003
httpResult.lastResult..item[1].@id will give the id of the second item. But there's a warning that popped up in the debugger that discourages from using square bracket operator. It recommends using the
ArrayCollection.getItemAt() instead.
002
After knowing all that, I can virtually get any value I want. But there's still along way to go in mastering Flex.
The Teams
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