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Perform the following three XPath queries on the XML Document below:

Line 87:

</cfsavecontent>

#priceSearch[i].xmlText#<br/>

</cfloop>

==[[JavaScript]]==

[[Category:JavaScript]]

'''Interpreter:''' Firefox 2.0

//create XMLDocument object from file

var xhr = new XMLHttpRequest();

xhr.open('GET', 'file.xml', false);

xhr.send(null);

var doc = xhr.responseXML;

//get first <item> element

var firstItem = doc.evaluate( '//item[1]', doc, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null ).singleNodeValue;

alert( firstItem.textContent );

//output contents of <price> elements

var prices = doc.evaluate( '//price', doc, null, XPathResult.ANY_TYPE, null );

for( var price = prices.iterateNext(); price != null; price = prices.iterateNext() ) {

alert( price.textContent );

}

//add <name> elements to array

var names = doc.evaluate( '//name', doc, null, XPathResult.ANY_TYPE, null);

var namesArray = [];

for( var name = names.iterateNext(); name != null; name = names.iterateNext() ) {

namesArray.push( name );

}

alert( namesArray );

Although some browsers support XPath, working with XML is much easier with E4X.

//create XML object from file

var xhr = new XMLHttpRequest();

xhr.open('GET', 'file.xml', false);

xhr.send(null);

var doc = new XML(xhr.responseText);

//get first <item> element

var firstItem = doc..item[0];

alert( firstItem );

//output contents of <price> elements

for each( var price in doc..price ) {

alert( price );

}

//add <name> elements to array

var names = [];

for each( var name in doc..name ) {

names.push( name );

}

alert( names );

==[[Perl]]==

[[Category:Perl]]

use XML::XPath qw();

my $x = XML::XPath->new('<inventory ... </inventory>');

[$x->findnodes('//item[1]')->get_nodelist]->[0];

print $x->findnodes_as_string('//price');

$x->findnodes('//name')->get_nodelist;

==[[PHP]]==

[[Category:PHP]]

<?php

//PHP5 only example due to changes in XML extensions between version 4 and 5 (Tested on PHP5.2.0)

$doc = DOMDocument::loadXML('<inventory title="OmniCorp Store #45x10^3">...</inventory>');

//Load from file instead with $doc = DOMDocument::load('filename');

$xpath = new DOMXPath($doc);

/*

1st Task: Retrieve the first "item" element

*/

$nodelist = $xpath->query('//item');

$result = $nodelist->item(0);

/*

2nd task: Perform an action on each "price" element (print it out)

*/

$nodelist = $xpath->query('//price');

for($i = 0; $i < $nodelist->length; $i++)

{

//print each price element in the DOMNodeList instance, $nodelist, as text/xml followed by a newline

print $doc->saveXML($nodelist->item($i))."\n";

}

/*

3rd Task: Get an array of all the "name" elements

*/

$nodelist = $xpath->query('//name');

//our array to hold all the name elements, though in practice you'd probably not need to do this and simply use the DOMNodeList

$result = array();

//a different way of iterating through the DOMNodeList

foreach($nodelist as $node)

{

$result[] = $node;

}

==[[Ruby]]==

[[Category:Ruby]]

#Example taken from the REXML tutorial (http://www.germane-software.com/software/rexml/docs/tutorial.html)

require "rexml/document"

include REXML

#create the REXML Document from the string (%q is Ruby's multiline string, everything between the two @-characters is the string)

doc = Document.new(

%q@<inventory title="OmniCorp Store #45x10^3">

...

</inventory>

@

)

# The invisibility cream is the first <item>

invisibility = XPath.first( doc, "//item" )

# Prints out all of the prices

XPath.each( doc, "//price") { |element| puts element.text }

# Gets an array of all of the "name" elements in the document.

names = XPath.match( doc, "//name" )