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<h1 class="content-header header-section1" id="versions_2_3_7" itemprop="headline">2.3.7</h1>
</div></div><div class="page-menu">
<div class="page-menu-title">Page Contents</div>
<ul><li><a class="page-menu-link" href="#autoid_148" data-menu-target="autoid_148">Changes on the Java side</a></li><li><a class="page-menu-link" href="#autoid_149" data-menu-target="autoid_149">Changes on the FTL side</a></li></ul> </div><p>Date of release: 2006-06-23</p><p>This release, compared to 2.3.7 RC1, contains new operators for
handling null/missing variables, , the <code class="inline-code">substring</code>
built-in, and some more bugfixes. Note that 2.3.7 RC1 has a long
change log, so you may want to <a href="versions_2_3_7rc1.html">read
that</a> too.</p>
<h2 class="content-header header-section2" id="autoid_148">Changes on the Java side</h2>
<ul>
<li>
<p>The <code class="inline-code">seq_contains</code> built-in now handles
<code class="inline-code">TemplateCollectionModel</code>-s as well.</p>
</li>
<li>
<p>Bug fixed: In 2.3.7 RC1
<code class="inline-code">FreemarkerServlet</code> has always died with
<code class="inline-code">NullPointerException</code> during
initialization.</p>
</li>
</ul>
<h2 class="content-header header-section2" id="autoid_149">Changes on the FTL side</h2>
<ul>
<li>
<p>3 new operators were added for terser missing variable
handling. These operators make the <code class="inline-code">default</code>,
<code class="inline-code">exists</code> and <code class="inline-code">if_exists</code>
built-ins deprecated. (The parser doesn&#39;t issue any warning
messages when you use deprecated built-ins, and they are still
working.):</p>
<ul>
<li>
<p><code class="inline-code"><em class="code-color">exp1</em>!<em class="code-color">exp2</em></code>
is near equivalent with
<code class="inline-code"><em class="code-color">exp1</em>?default(<em class="code-color">exp2</em>)</code>,
also
<code class="inline-code">(<em class="code-color">exp1</em>)!<em class="code-color">exp2</em></code>
is near equivalent with
<code class="inline-code">(<em class="code-color">exp1</em>)?default(<em class="code-color">exp2</em>)</code>.
The only difference is that this new operator doesn&#39;t
evaluate the
<code class="inline-code"><em class="code-color">exp2</em></code> when the
default value is not needed.</p>
</li>
<li>
<p><code class="inline-code"><em class="code-color">exp1</em>!</code> is
similar to
<code class="inline-code"><em class="code-color">exp1</em>?if_exists</code>,
also <code class="inline-code">(<em class="code-color">exp1</em>)!</code>
is similar to
<code class="inline-code">(<em class="code-color">exp1</em>)?if_exists</code>.
The difference is that with this new operator the default
value is an empty string and an empty list and empty hash at
the same time (multi-type variable), while with
<code class="inline-code">if_exists</code> the default value was an empty
string and an empty list and empty hash and boolean
<code class="inline-code">false</code> and a transform that does nothing
and ignores all parameters at the same time.</p>
</li>
<li>
<p><code class="inline-code"><em class="code-color">exp1</em>??</code>
is equivalent with
<code class="inline-code"><em class="code-color">exp1</em>?exists</code>,
also <code class="inline-code">(<em class="code-color">exp1</em>)??</code>
is equivalent with with
<code class="inline-code">(<em class="code-color">exp1</em>)?exists</code>.</p>
</li>
</ul>
</li>
<li>
<p>New built-in:
<code class="inline-code"><em class="code-color">exp</em>?substring(<em class="code-color">from</em>,
<em class="code-color">toExclusive</em>)</code>, also callable
as
<code class="inline-code"><em class="code-color">exp</em>?substring(<em class="code-color">from</em>)</code>.
Getting substrings was possible for a long time like
<code class="inline-code">myString[<em class="code-color">from</em>..<em class="code-color">toInclusive</em>]</code>
and
<code class="inline-code">myString[<em class="code-color">from</em>..]</code>.
This syntax is now deprecated for getting substrings (but it&#39;s
still working), and instead you should use
<code class="inline-code">myString?substring(<em class="code-color">from</em>,
<em class="code-color">toExclusive</em>)</code> and
<code class="inline-code">myString?substring(<em class="code-color">from</em>)</code>.
Sequence (list) slices still has to be get with the old syntax,
since <code class="inline-code">substring</code> only applies to strings.
Please note that the ``to&#39;&#39; parameter is 1 greater with this new
builtin, as it is an exclusive index. Further difference is that
the <code class="inline-code">substring</code> built-in requires that the
``from&#39;&#39; index is less than or equal to the ``to&#39;&#39; index. So 0
length substrings are possible now, but not reversed
substrings.</p>
</li>
<li>
<p>Bug fixed: <a href="http://sourceforge.net/tracker/?func=detail&amp;atid=100794&amp;aid=1487694&amp;group_id=794">[1487694]</a>
malfunction when the <code class="inline-code">recover</code> directive has no
nested content</p>
</li>
</ul>
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