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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>YUI Library Examples: Cookie Utility: Subcookie Example</title>
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//enable passthrough of errors from YUI Event:
if ((typeof YAHOO !== "undefined") && (YAHOO.util) && (YAHOO.util.Event)) {
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<div id="pagetitle"><h1>YUI Library Examples: Cookie Utility: Subcookie Example</h1></div>
</div>
<div id="bd">
<div id="yui-main">
<div class="yui-b">
<div class="yui-ge">
<div class="yui-u first example">
<div class="promo">
<h1>Cookie Utility: Subcookie Example</h1>
<div class="exampleIntro">
<p>This example shows how to get and set subcookies as well as using conversion functions when retrieving subcookie values.</p>
</div>
<div class="example-container module ">
<div id="example-canvas" class="bd">
<!--BEGIN SOURCE CODE FOR EXAMPLE =============================== -->
<h3>Note:</h3>
<p>Keep an eye on the Logger console at right to view the log messages associated with this example.</p>
<script type="text/javascript">
(function(){
var Cookie = YAHOO.util.Cookie;
//get subcookie values
var name = Cookie.getSub("example", "name");
var today = Cookie.getSub("example", "today", function(value){
return new Date(value);
});
var count = Cookie.getSub("example", "count", Number);
YAHOO.log("The subcookie 'name' is '" + name + "'(" + (typeof name) + ")");
YAHOO.log("The subcookie 'today' is '" + today + "'(" + (typeof today) + ")");
YAHOO.log("The subcookie 'count' is '" + count + "'(" + (typeof count) + ")");
//set subcookie values
Cookie.setSub("example", "name", "Yahoo!");
Cookie.setSub("example", "today", (new Date()).toString());
Cookie.setSub("example", "count", Math.round(Math.random() * 30));
})();
</script>
<!--END SOURCE CODE FOR EXAMPLE =============================== -->
</div>
</div>
</div>
<h2 class="first">Subcookie Example</h2>
<p>This example begins by setting up a local reference to the Cookie utility:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var Cookie = YAHOO.util.Cookie;
</textarea>
<p>The next three lines attempt to read the values stored in subcookies of the "example" cookie:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
var name = Cookie.getSub("example", "name");
var today = Cookie.getSub("example", "today", function(value){
return new Date(value);
});
var count = Cookie.getSub("example", "count", Number);
</textarea>
<p>The "name" subcookie stores a string so it is retrieved without specifying a third argument. The "today"
subcookie stores a date string, which should be converted to a <code>Date</code> object upon retrieval; the third argument
of <code>getSub()</code> is specified as a custom function that will convert the returned value into a <code>Date</code> object.
The "count" subcookie contains a number and is converted to an actual JavaScript number by passing in the native
<code>Number</code> function. If any of these subcookies don't exist, <code>getSub()</code> returns <code>null</code> (this should
be the case the first time you run the example). The retrieved values are output in the logger.</p>
<p>After that, new values are assigned to the various subcookies:</p>
<textarea name="code" class="JScript" cols="60" rows="1">
Cookie.setSub("example", "name", "Yahoo!");
Cookie.setSub("example", "today", (new Date()).toString());
Cookie.setSub("example", "count", Math.round(Math.random() * 30));
</textarea>
<p>The "name" subcookie is set to "Yahoo!", the "today" subcookie is set to the value
of a new <code>Date</code> object, outputting its string representation, and the "count" subcookie is filled
with a random number. The next time you run the example, the subcookies should have these values.</p>
<h2>Configuration for This Example</h2>
<p>You can load the necessary JavaScript and CSS for this example from Yahoo's servers. <a href="http://developer.yahoo.com/yui/articles/hosting/?cookie&MIN#configure">Click here to load the YUI Dependency Configurator with all of this example's dependencies preconfigured</a>.</p>
</div>
<div class="yui-u">
<div id="loggerModule" class="yui-skin-sam">
<h3 class="firstContent">YUI Logger Output:</h3>
<div id="loggerDiv"></div>
</div>
<div id="examples">
<h3>Cookie Utility Examples:</h3>
<div id="exampleToc">
<ul>
<li><a href='../cookie/cookie-simple-example.html'>Simple Cookie Example</a></li><li><a href='../cookie/cookie-advanced-example.html'>Advanced Cookie Example</a></li><li class='selected'><a href='../cookie/cookie-subcookie-example.html'>Subcookie Example</a></li> </ul>
</div>
</div>
<div id="module">
<h3>More Cookie Utility Resources:</h3>
<ul>
<li><a href="http://developer.yahoo.com/yui/cookie/">User's Guide</a> (external)</li>
<li><a href="../../docs/module_cookie.html">API Documentation</a></li>
<li><a href="http://yuiblog.com/assets/pdf/cheatsheets/cookie.pdf">Cheat Sheet PDF</a> (external)</li></ul>
</div>
</div>
</div>
</div>
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