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discourse-legacysite-perl/site/glist/templates/help/GT/Template/Vars.html
dsainty b6fc94ff0f Second pass at adding key files
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<head>
<title>GT::Template::Vars - Tied hash for template tags handling</title>
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<p><a name="__index__"></a></p>
<!-- INDEX BEGIN -->
<ul>
<li><a href="#name">NAME</a></li>
<li><a href="#synopsis">SYNOPSIS</a></li>
<li><a href="#description">DESCRIPTION</a></li>
<li><a href="#interface">INTERFACE</a></li>
<ul>
<li><a href="#accessing_values">Accessing values</a></li>
<li><a href="#setting_values">Setting values</a></li>
<li><a href="#keys__exists">Keys, Exists</a></li>
</ul>
<li><a href="#see_also">SEE ALSO</a></li>
<li><a href="#maintainer">MAINTAINER</a></li>
<li><a href="#copyright">COPYRIGHT</a></li>
<li><a href="#version">VERSION</a></li>
</ul>
<!-- INDEX END -->
<hr />
<p>
</p>
<h1><a name="name">NAME</a></h1>
<p>GT::Template::Vars - Tied hash for template tags handling</p>
<p>
</p>
<hr />
<h1><a name="synopsis">SYNOPSIS</a></h1>
<pre>
my $vars = GT::Template-&gt;vars;
print $vars-&gt;{foo};</pre>
<p>
</p>
<hr />
<h1><a name="description">DESCRIPTION</a></h1>
<p>This module is designed to provide a simple interface to GT::Template tags from
Perl code. Prior to this module, the <code>tags()</code> method of GT::Template returned a
hash reference which could contain all sorts of different values - scalar
references, LVALUE references, GT::Config objects, etc. This new interface
provides a tied hash reference designed to aid in retrieving and setting values
in the same way template variables are retrieved and set from templates.</p>
<p>
</p>
<hr />
<h1><a name="interface">INTERFACE</a></h1>
<p>
</p>
<h2><a name="accessing_values">Accessing values</a></h2>
<p>Accessing a value is simple - just access <code>$vars-&gt;{name}</code>. The regular
rules of escaping apply here: if the value would have been HTML-escaped in the
template, it will be escaped when you get it.</p>
<p>
</p>
<h2><a name="setting_values">Setting values</a></h2>
<p>Setting a value is easy - simply do: <code>$vars-&gt;{name} = $value;</code>. ``name''
can be anything GT::Template recognises as a variable, so
<code>$vars-&gt;{'name.key'}</code> would set <code>-&gt;{name}-&gt;{key}</code> (see
<a href="glist.cgi?do=admin_gtdoc&topic=/GT/Template/Tutorial.html#advanced_variables_using_references">Advanced variables using references in the GT::Template::Tutorial manpage</a> for more
information on complex variables).</p>
<p>The regular rules of escaping apply here: if escaping is turned on, a value you
set will be escaped when accessed again via $vars or in a template. If you
want to set a tag containing raw HTML, you should set a scalar reference, such
as: <code>$vars-&gt;{name} = \$value;</code>.</p>
<p>
</p>
<h2><a name="keys__exists">Keys, Exists</a></h2>
<p>You can use <code>keys %$vars</code> to get a list of keys of the tag object, but you
should note that while <code>$vars-&gt;{&quot;a.b&quot;}</code> is valid and
<code>exists $vars-&gt;{&quot;a.b&quot;}</code> may return true, it will <strong>not</strong> be present in the
list of keys returned by <code>keys %$vars</code>.</p>
<p>
</p>
<hr />
<h1><a name="see_also">SEE ALSO</a></h1>
<p><a href="glist.cgi?do=admin_gtdoc&topic=/GT/Template.html">the GT::Template manpage</a></p>
<p><a href="glist.cgi?do=admin_gtdoc&topic=/GT/Template/Tutorial.html">the GT::Template::Tutorial manpage</a></p>
<p>
</p>
<hr />
<h1><a name="maintainer">MAINTAINER</a></h1>
<p>Jason Rhinelander</p>
<p>
</p>
<hr />
<h1><a name="copyright">COPYRIGHT</a></h1>
<p>Copyright (c) 2005 Gossamer Threads Inc. All Rights Reserved.
<a href="http://www.gossamer-threads.com/">http://www.gossamer-threads.com/</a></p>
<p>
</p>
<hr />
<h1><a name="version">VERSION</a></h1>
<p>Revision: $Id: Vars.pm,v 1.3 2005/03/05 01:17:20 jagerman Exp $</p>
</body>
</html>
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