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From ddek...@apache.org
Subject [27/50] incubator-freemarker-site git commit: 2.3.26-nightly docs preview
Date Mon, 13 Mar 2017 10:58:03 GMT
http://git-wip-us.apache.org/repos/asf/incubator-freemarker-site/blob/52c070a9/builds/2.3.26-nightly/ref_builtins_expert.html
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+<div class="col-right"><div class="page-content"><div class="page-title"><div class="pagers top"><a class="paging-arrow previous" href="ref_builtins_type_independent.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_directives.html"><span>Next</span></a></div><div class="title-wrapper">
+<h1 class="content-header header-section1" id="ref_builtins_expert" itemprop="headline">Seldom used and expert built-ins</h1>
+</div></div><div class="page-menu">
+<div class="page-menu-title">Page Contents</div>
+<ul><li><a class="page-menu-link" href="#ref_buitin_api_and_has_api" data-menu-target="ref_buitin_api_and_has_api">api, has_api</a></li><li><a class="page-menu-link" href="#ref_builtin_numType" data-menu-target="ref_builtin_numType">byte, double, float, int, long, short</a></li><li><a class="page-menu-link" href="#ref_builtin_eval" data-menu-target="ref_builtin_eval">eval</a></li><li><a class="page-menu-link" href="#ref_builtin_has_content" data-menu-target="ref_builtin_has_content">has_content</a></li><li><a class="page-menu-link" href="#ref_builtin_interpret" data-menu-target="ref_builtin_interpret">interpret</a></li><li><a class="page-menu-link" href="#ref_builtin_isType" data-menu-target="ref_builtin_isType">is_...</a></li><li><a class="page-menu-link" href="#ref_builtin_markup_string" data-menu-target="ref_builtin_markup_string">markup_string</a></li><li><a class="page-menu-link" href="#ref_builtin_namespace" data-menu-target="ref_builtin_namespace">namespace</a></li><li><a cla
 ss="page-menu-link" href="#ref_builtin_new" data-menu-target="ref_builtin_new">new</a></li><li><a class="page-menu-link" href="#ref_builtin_numToDate" data-menu-target="ref_builtin_numToDate">number_to_date, number_to_time, number_to_datetime</a></li></ul> </div><p>These are the built-ins that normally you should not use, but in
+        exceptional situations (debugging, advanced macros) they can be
+        useful. If you need to use these in your normal page templates, you
+        may revisit the data-model so you don&#39;t need to use these.</p>
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_buitin_api_and_has_api">api, has_api</h2>
+
+
+          
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>These built-ins exists since FreeMarker 2.3.22</p>
+            </div>
+
+
+          <p><code class="inline-code"><em class="code-color">value</em>?api</code>
+          provides access to the API (usually, the Java API) of
+          <code class="inline-code"><em class="code-color">value</em></code>, like
+          <code class="inline-code"><em class="code-color">value</em>?api.<em class="code-color">someJavaMethod()</em></code>
+          or
+          <code class="inline-code"><em class="code-color">value</em>?api.<em class="code-color">someBeanProperty</em></code>,
+          if the value itself supports exposing its API. This meant to be used
+          rarely, when you need to call a Java method of an object, but the
+          by-design simplistic view of the value that FreeMarker exposes to
+          the templates hides that, and there&#39;s no equivalent built-in either.
+          For example, when you put a <code class="inline-code">Map</code> into the
+          data-model (and you are using the default object wrapper),
+          <code class="inline-code">myMap.myMethod()</code> in a template basically
+          translates to <code class="inline-code">((Method)
+          myMap.get(&quot;myMethod&quot;)).invoke(...)</code> in Java, thus you can&#39;t
+          call <code class="inline-code">myMethod</code>. If, however, you write
+          <code class="inline-code">myMap?api.myMethod()</code> instead, that means
+          <code class="inline-code">myMap.myMethod()</code> in Java. Similarly,
+          <code class="inline-code">myMap?api.myProperty</code> translates to
+          <code class="inline-code">myMap.getMyProperty()</code> in Java, instead of to
+          <code class="inline-code">myMap.get(&quot;myProperty&quot;)</code>.</p>
+
+          <p><em>You should avoid using <code class="inline-code">api</code>, and
+          rely on the capabilities of the FTL types and the related built-ins
+          as far as possible.</em> For example, don&#39;t use
+          <code class="inline-code">users?api.size()</code>, but
+          <code class="inline-code">users?size</code>. The variation that uses
+          <code class="inline-code">?api</code> is more verbose, slower, more easily breaks
+          when FreeMarker configuration settings are changed, and most
+          importantly, more prone to break as the technical details of the
+          data-model change. For example, if <code class="inline-code">users</code> is
+          changed from a <code class="inline-code">List</code> to an array,
+          <code class="inline-code">users?size</code> will keep working, while
+          <code class="inline-code">users?api.size()</code> will break.</p>
+
+          <p>Avoid calling methods that <em>modify</em> an
+          object (especially <code class="inline-code">Map</code>-s and
+          <code class="inline-code">Collection</code>-s) or that aren&#39;t thread safe from
+          other reasons. Templates usually aren&#39;t expected to modify the
+          objects exposed to them, just to display them. Thus the application
+          may passes some objects to multiple (possibly concurrent) template
+          processings.</p>
+
+          <p>The <code class="inline-code">api</code> built-in is not everywhere
+          available, some requirements has to be met:</p>
+
+          <ul>
+            <li>
+              <p>The <code class="inline-code">api_builtin_enabled</code> configuration
+              setting must be set to <code class="inline-code">true</code>. Its default is
+              <code class="inline-code">false</code> (at least as of 2.3.22) for not
+              lowering the security of existing applications.</p>
+            </li>
+
+            <li>
+              <p>The value itself has to support it. We are talking about
+              the value as the template sees it, which is created from the
+              original object (that&#39;s coming from the data-model or from a
+              Java method return value) value via <a href="pgui_datamodel_objectWrapper.html">object wrapping</a>.
+              Hence, this depends on the <code class="inline-code">object_wrapper</code>
+              FreeMarker configuration setting, and on the class of the
+              wrapped (the original) object:</p>
+
+              <ul>
+                <li>
+                  <p>When the object wrapper is a
+                  <code class="inline-code">DefaultObjectWrapper</code> with its
+                  <code class="inline-code">incompatibleImprovements</code> set to 2.3.22 or
+                  higher (<a href="pgui_datamodel_objectWrapper.html#topic.defaultObjectWrapperIcI">see
+                  how to set it here</a>), FTL values made from
+                  <code class="inline-code">Map</code>-s and <code class="inline-code">List</code>-s
+                  support <code class="inline-code">?api</code>. (Actually, what matters is
+                  that its <code class="inline-code">useAdaptersForContainer</code> property
+                  is set to <code class="inline-code">true</code>, but that&#39;s the default
+                  with said <code class="inline-code">incompatibleImprovements</code>.)
+                  Other <code class="inline-code">java.util.Collections</code> (such as
+                  <code class="inline-code">Set</code>-s) only support
+                  <code class="inline-code">?api</code> if
+                  <code class="inline-code">DefaultObjectWrapper</code>&#39;s
+                  <code class="inline-code">forceLegacyNonListCollections</code> property is
+                  set to <code class="inline-code">false</code> (the default is
+                  <code class="inline-code">true</code> for better out-of-the-box backward
+                  compatibility).</p>
+                </li>
+
+                <li>
+                  <p>When wrapped with pure
+                  <code class="inline-code">BeansWrapper</code>, all values support
+                  <code class="inline-code">?api</code>.</p>
+                </li>
+
+                <li>
+                  <p>Custom <code class="inline-code">TemplateModel</code>-s can support
+                  <code class="inline-code">?api</code> by implementing the
+                  <code class="inline-code">freemarker.template.TemplateModelWithAPISupport</code>
+                  interface.</p>
+                </li>
+              </ul>
+            </li>
+          </ul>
+
+          <p>Using <code class="inline-code">?api</code> when it&#39;s not allowed in the
+          configuration or when the value doesn&#39;t support it will abort
+          template processing with error.</p>
+
+          <p>Whether a value supports <code class="inline-code">?api</code> can be
+          checked like
+          <code class="inline-code"><em class="code-color">value</em>?has_api</code>, which
+          returns a boolean value. Note that the result of
+          <code class="inline-code">?has_api</code> isn&#39;t influenced by the
+          <code class="inline-code">api_builtin_enabled</code> setting.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_numType">byte, double, float, int, long, short</h2>
+
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          <p>Returns a <code class="inline-code">SimpleNumber</code> which contains the
+          same value as the original variable, but uses
+          <code class="inline-code">java.lang.<em class="code-color">Type</em></code> for the
+          internal representation of the value. This is useful if a method is
+          overloaded, or if a <code class="inline-code">TemplateModel</code> unwrapper has
+          problem with automatically choosing the suitable
+          <code class="inline-code">java.lang.*</code> type. Note that since version 2.3.9
+          the unwrapper has been improved substantially, so you will hardly
+          ever need to use these built-ins to convert between numerical types,
+          except for resolving ambiguity in overloaded method
+          invocation.</p>
+
+          <p>The <code class="inline-code">long</code> built-in can also be used with
+          date, time and date-time values to get the value as
+          <code class="inline-code">java.util.Date.getTime()</code> would return. This is
+          useful if you have to call a Java methods that expect a timestamp as
+          a <code class="inline-code">long</code>.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_eval">eval</h2>
+
+
+          
+
+          
+
+          <p>This built-in evaluates a string as an FTL expression. For
+          example <code class="inline-code">&quot;1+2&quot;?eval</code> returns number 3.</p>
+
+          <p>The evaluated expression sees the same variables (such as
+          locals) that are visible at the place of the invocation of
+          <code class="inline-code">eval</code>. That is, it behaves similarly as if in
+          place of <code class="inline-code"><em class="code-color">s</em>?eval</code> you
+          had the <em>value of</em>
+          <code class="inline-code"><em class="code-color">s</em></code> there. Except, it
+          can&#39;t use <a href="ref_builtins_loop_var.html">loop variable
+          built-ins</a> that refer to a loop variable that was created
+          outside <code class="inline-code"><em class="code-color">s</em></code>.</p>
+
+          <p>Regarding the configuration settings that affect the parsing
+          (like syntax) and evaluation the rules are the same as with the
+          <a href="#ref_builtin_interpret"><code>interpret</code>
+          built-in</a>.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_has_content">has_content</h2>
+
+
+          
+
+          <p>It is <code class="inline-code">true</code> if the variable exists (and
+          isn&#39;t Java <code class="inline-code">null</code>) and is not "empty",
+          otherwise it is <code class="inline-code">false</code>. The meaning of
+          "empty" depends on the concrete case. This follows
+          intuitive common-sense ideas. The following are empty: a string with
+          0 length, a <a href="dgui_misc_autoescaping.html#dgui_misc_autoescaping_movalues">markup
+          output value</a> with 0 length markup, a sequence or hash with no
+          sub variables, a collection which has passed the last element. If
+          the value is not of any of these types, then it counts as non-empty
+          if it&#39;s a number or a date or a boolean (e.g. <code class="inline-code">0</code>
+          and <code class="inline-code">false</code> are not empty), otherwise it counts as
+          empty. Note that when your data-model implements multiple template
+          model interfaces you may get unexpected results. However, when in
+          doubt you can use always use <code class="inline-code">expr!?size &gt; 0</code> or
+          <code class="inline-code">expr!?length &gt; 0</code> instead of
+          <code class="inline-code">expr?has_content</code>.</p>
+
+          <p>This buit-in is exceptional in that you can use the
+          parentheses trick like with the <a href="dgui_template_exp.html#dgui_template_exp_missing_default">default value
+          operator</a>. That is, you can write both
+          <code class="inline-code">product.color?has_content</code> and
+          <code class="inline-code">(product.color)?has_content</code>. The first doesn&#39;t
+          handle the case when <code class="inline-code">product</code> is missing, the last
+          does.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_interpret">interpret</h2>
+
+
+          
+
+          <p>This built-in parses a string as an FTL template, and returns
+          an user-defined directive that executes that template, just as if a
+          template with that content were <a href="ref_directive_include.html"><code>include</code>-d</a>
+          at that point. Example:</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#assign x=[&quot;a&quot;, &quot;b&quot;, &quot;c&quot;]&gt;
+&lt;#assign templateSource = r&quot;&lt;#list x as y&gt;${y}&lt;/#list&gt;&quot;&gt;
+&lt;#-- Note: That r was needed so that the ${y} is not interpreted above --&gt;
+&lt;#assign inlineTemplate = templateSource?interpret&gt;
+&lt;@inlineTemplate /&gt;</pre></div>
+
+          <p>The output:</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">abc</pre></div>
+
+          <p>As you can see, <code class="inline-code">inlineTemplate</code> is a
+          user-defined directive that, when executed, runs the template whose
+          content is the value of <code class="inline-code">templateSource</code>.</p>
+
+          <p>The name of the template created by
+          <code class="inline-code">interpret</code> is the name of the template that calls
+          <code class="inline-code">interpret</code>, plus
+          <code class="inline-code">&quot;-&gt;anonymous_interpreted&quot;</code>. For example, if the
+          template that calls the built-in is
+          <code class="inline-code">&quot;foo/bar.ftl&quot;</code>, then the name of the resulting
+          template is
+          <code class="inline-code">&quot;foo/bar.ftl-&gt;anonymous_interpreted&quot;</code>. Thus,
+          relative paths inside the interpreted template are relative to this
+          path (i.e., the base directory will be <code class="inline-code">&quot;foo&quot;</code>),
+          and errors inside the interpreted template will point to this
+          generated template name.</p>
+
+          <p>For more helpful error messages, you can override the template
+          name part after the <code class="inline-code">&quot;-&gt;&quot;</code>. For example, let&#39;s
+          say <code class="inline-code">mailTemplateSource</code> comes from the
+          <code class="inline-code">mail_template</code> database table, and in the case of
+          error, you want the error log to contain the database ID of the
+          failing template:</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#assign inlineTemplate = [mailTemplateSource, &quot;mail_templates id=${mailTemplateId}&quot;]?interpret&gt;</pre></div>
+
+          <p>As you can see, <code class="inline-code">interpret</code> can be applied on
+          a sequence of two items, in which case the first item is the FTL
+          string to interpret, and the second items is the template name used
+          after the <code class="inline-code">&quot;-&gt;&quot;</code>.</p>
+
+          <p>The configuration settings that affect the interpreted
+          template are the same as of the surrounding template, except that
+          parser settings specified in the <a href="ref_directive_ftl.html#ref.directive.ftl"><code>ftl</code> directive</a>
+          or was established via tag syntax or naming convention
+          auto-detection are instead coming from the
+          <code class="inline-code">Configuration</code> object (or naturally, from the
+          <a href="pgui_config_templateconfigurations.html"><code>TemplateConfiguration</code></a>,
+          if there&#39;s any). Thus the tag syntax, naming convention, whitespace
+          handling, etc. of the interpreted template is independent of that
+          established <em>inside</em> the surrounding template. An
+          important exception from this rule is that the <a href="dgui_misc_autoescaping.html#dgui_misc_autoescaping_outputformat">output format</a>
+          and auto-escaping policy is inherited from the lexical context where
+          <code class="inline-code">interpret</code> is called from. For example in a
+          template that has <code class="inline-code">&lt;#ftl
+          output_format=&quot;XML&quot;&gt;</code> header (or if you are inside a
+          <code class="inline-code">&lt;#output_format
+          &quot;XML&quot;&gt;<em class="code-color">...</em>&lt;/#output_format&gt;</code>
+          block), <code class="inline-code">interpret</code> calls in it will produce
+          directives with XML output format.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_isType">is_...</h2>
+
+
+          
+
+          
+
+          <p>These built-ins check the type of a variable, and returns
+          <code class="inline-code">true</code> or <code class="inline-code">false</code> depending on the
+          type. The list of
+          <code class="inline-code">is_<em class="code-color">...</em></code>
+          built-ins:</p>
+
+            <div class="table-responsive">
+    <table class="table">
+
+            <thead>
+              <tr>
+                <th>Built-in</th>
+
+
+                <th>Returns <code class="inline-code">true</code> if the value is a ...</th>
+
+              </tr>
+
+            </thead>
+
+
+            <tbody>
+              <tr>
+                <td><code class="inline-code">is_string</code></td>
+
+
+                <td>string</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_number</code></td>
+
+
+                <td>number</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_boolean</code></td>
+
+
+                <td>boolean</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_date</code></td>
+
+
+                <td>Don&#39;t use it! Same as <code class="inline-code">is_date_like</code>, use
+                that instead. Later may changes meaning to
+                <code class="inline-code">date_only</code>.</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_date_like</code></td>
+
+
+                <td>date-like, means either date, time or date-time, or
+                date-like with unknown precise type (since FreeMarker
+                2.3.21)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_date_only</code></td>
+
+
+                <td>date (no time of the day part) (since FreeMarker
+                2.3.21)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_time</code></td>
+
+
+                <td>time (no year-month-day part) (since FreeMarker
+                2.3.21)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_datetime</code></td>
+
+
+                <td>date-time (contains both year-month-day and time of the
+                day)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_unknown_date_like</code></td>
+
+
+                <td>date-like where we don&#39;t know if it&#39;s a date or a time or
+                a date-time</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_method</code></td>
+
+
+                <td>method</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_transform</code></td>
+
+
+                <td>transform</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_macro</code></td>
+
+
+                <td>macro or function (yes, also for function; a historical
+                glitch)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_hash</code></td>
+
+
+                <td>hash (including extended hash)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_hash_ex</code></td>
+
+
+                <td>extended hash (supports <code class="inline-code">?keys</code> and
+                <code class="inline-code">?values</code>)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_sequence</code></td>
+
+
+                <td>sequence (Historical quirk: Before <a href="pgui_config_incompatible_improvements.html#pgui_config_incompatible_improvements_how_to_set"><code>incompatible_improvements</code></a>
+                2.3.24 it returns <code class="inline-code">true</code> for Java methods as
+                they implement the
+                <code class="inline-code">[<em class="code-color">index</em>]</code>
+                operator, however, they fail on
+                <code class="inline-code">?size</code>.)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_collection</code></td>
+
+
+                <td>collection (including extended collection)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_collection_ex</code></td>
+
+
+                <td>extended collection (supports
+                <code class="inline-code">?size</code>)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_enumerable</code></td>
+
+
+                <td>sequence or collection</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_indexable</code></td>
+
+
+                <td>sequence (Historical quirk: it returns
+                <code class="inline-code">true</code> for Java methods as they implement the
+                <code class="inline-code">[<em class="code-color">index</em>]</code>
+                operator.)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_directive</code></td>
+
+
+                <td>Whatever kind of directive (for example a macro, <span class="marked-for-programmers">or
+                <code class="inline-code">TemplateDirectiveModel</code>,
+                <code class="inline-code">TemplateTransformModel</code>, etc.</span>), or
+                function (a historical glitch)</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_node</code></td>
+
+
+                <td>node</td>
+
+              </tr>
+
+
+              <tr>
+                <td><code class="inline-code">is_markup_output</code></td>
+
+
+                <td>markup output (a value that won&#39;t be <a href="dgui_misc_autoescaping.html">auto-escaped</a>)</td>
+
+              </tr>
+
+            </tbody>
+
+              </table>
+  </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_markup_string">markup_string</h2>
+
+
+          <p></p>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.24.</p>
+            </div>
+
+
+          <p>Returns the markup stored inside a <a href="dgui_misc_autoescaping.html#dgui_misc_autoescaping_movalues">markup output value</a>
+          as string. This is useful if the value has to be passed to a Java
+          method for a <code class="inline-code">String</code> parameter, or if we want to
+          manipulate the markup directly in the template. Note that the
+          resulting string can be converted back to markup output value with
+          <a href="ref_builtins_string.html#ref_builtin_no_esc"><code>?no_esc</code></a>.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_namespace">namespace</h2>
+
+
+          
+
+          <p>This built-in returns the namespace (i.e. the
+          "gate" hash to the namespace) associated with a macro
+          or function variable. You can use it with macros and functions
+          only.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_new">new</h2>
+
+
+          
+
+          
+
+          <p>This is to create a variable of a certain
+          <code class="inline-code">TemplateModel</code> implementation.</p>
+
+          <p>On the left side of <code class="inline-code">?</code> you specify a string,
+          the full-qualified class name of a <code class="inline-code">TemplateModel</code>
+          implementation. The result is a method variable that calls the
+          constructor, and returns the new variable.</p>
+
+          <p>Example:</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#-- Creates an user-defined directive be calling the parameterless constructor of the class --&gt;
+&lt;#assign word_wrapp = &quot;com.acmee.freemarker.WordWrapperDirective&quot;?new()&gt;
+&lt;#-- Creates an user-defined directive be calling the constructor with one numerical argument --&gt;
+&lt;#assign word_wrapp_narrow = &quot;com.acmee.freemarker.WordWrapperDirective&quot;?new(40)&gt;</pre></div>
+
+          <p>For more information about how the constructor parameters are
+          unwrapped and how overloaded constructor is chosen, read: <a href="pgui_misc_beanwrapper.html">Programmer&#39;s Guide/Miscellaneous/Bean wrapper</a></p>
+
+          <p>This built-in can be a security concern because the template
+          author can create arbitrary Java objects and then use them, as far
+          as they implement <code class="inline-code">TemplateModel</code>. Also the
+          template author can trigger static initialization for classes that
+          don&#39;t even implement <code class="inline-code">TemplateModel</code>. You can
+          (since 2.3.17) restrict the classes accessible with this built-in
+          using
+          <code class="inline-code">Configuration.setNewBuiltinClassResolver(TemplateClassResolver)</code>
+          or the <code class="inline-code">new_builtin_class_resolver</code> setting. See
+          the Java API docs for more information. If you are allowing
+          not-so-much-trusted users to upload templates then you should
+          definitely look into this topic.</p>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_numToDate">number_to_date, number_to_time, number_to_datetime</h2>
+
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          
+
+          <p>These are used to convert a number (usually a Java
+          <code class="inline-code">long</code>) to a date, time or date-time, respectively.
+          This does them same as <code class="inline-code">new java.util.Date(long)</code>
+          in Java, that is, the number is interpreted as the milliseconds
+          passed since the epoch. The number can be anything and of any type
+          as far as its value fits into a <code class="inline-code">long</code>. If the
+          number isn&#39;t a whole number, it will be rounded to whole with
+          half-up rule.</p>
+
+          <p>Example:</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">${1305575275540?number_to_datetime}
+${1305575275540?number_to_date}
+${1305575275540?number_to_time}</pre></div>
+
+          <p>The output will be something like this (depending on the
+          current locale and time zone):</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">May 16, 2011 3:47:55 PM
+May 16, 2011
+3:47:55 PM</pre></div>
+        <div class="bottom-pagers-wrapper"><div class="pagers bottom"><a class="paging-arrow previous" href="ref_builtins_type_independent.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_directives.html"><span>Next</span></a></div></div></div></div>      </div>
+    </div>
+<div class="site-footer"><div class="site-width"><div class="footer-top"><div class="col-left sitemap"><div class="column"><h3 class="column-header">Overview</h3><ul><li><a href="http://freemarker.org/">What is FreeMarker?</a></li><li><a href="http://freemarker.org/freemarkerdownload.html">Download</a></li><li><a href="app_versions.html">Version history</a></li><li><a href="http://freemarker.org/history.html">About us</a></li><li><a itemprop="license" href="app_license.html">License</a></li></ul></div><div class="column"><h3 class="column-header">Handy stuff</h3><ul><li><a href="http://freemarker-online.kenshoo.com/">Try template online</a></li><li><a href="dgui_template_exp.html#exp_cheatsheet">Expressions cheatsheet</a></li><li><a href="ref_directive_alphaidx.html">#directives</a></li><li><a href="ref_builtins_alphaidx.html">?built_ins</a></li><li><a href="ref_specvar.html">.special_vars</a></li></ul></div><div class="column"><h3 class="column-header">Community</h3><ul><li><a href
 ="https://github.com/freemarker/freemarker">FreeMarker on Github</a></li><li><a href="https://twitter.com/freemarker">Follow us on Twitter</a></li><li><a href="https://issues.apache.org/jira/browse/FREEMARKER/">Report a bug</a></li><li><a href="http://stackoverflow.com/questions/ask?tags=freemarker">Ask a question</a></li><li><a href="http://freemarker.org/mailing-lists.html">Mailing lists</a></li></ul></div></div><div class="col-right"><ul class="social-icons"><li><a class="github" href="https://github.com/freemarker/freemarker">Github</a></li><li><a class="twitter" href="https://twitter.com/freemarker">Twitter</a></li><li><a class="stack-overflow" href="http://stackoverflow.com/questions/ask?tags=freemarker">Stack Overflow</a></li></ul><a class="xxe" href="http://www.xmlmind.com/xmleditor/" rel="nofollow" title="Edited with XMLMind XML Editor"><span>Edited with XMLMind XML Editor</span></a></div></div><div class="footer-bottom"> <p class="last-generated">
+Last generated:
+<time itemprop="dateModified" datetime="2017-03-13T10:55:28Z" title="Monday, March 13, 2017 10:55:28 AM GMT">2017-03-13 10:55:28 GMT</time>, for Freemarker 2.3.26 </p>
+<p class="copyright">
+© <span itemprop="copyrightYear">1999</span>–2017
+<a itemtype="http://schema.org/Organization" itemprop="copyrightHolder" href="http://apache.org/">The Apache Software Foundation</a>. Apache FreeMarker, FreeMarker, Apache Incubator, Apache, the Apache FreeMarker logo are trademarks of The Apache Software Foundation. </p>
+</div></div></div></body>
+</html>

http://git-wip-us.apache.org/repos/asf/incubator-freemarker-site/blob/52c070a9/builds/2.3.26-nightly/ref_builtins_hash.html
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diff --git a/builds/2.3.26-nightly/ref_builtins_hash.html b/builds/2.3.26-nightly/ref_builtins_hash.html
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--- /dev/null
+++ b/builds/2.3.26-nightly/ref_builtins_hash.html
@@ -0,0 +1,142 @@
+<!doctype html>
+<!-- Generated by FreeMarker/Docgen from DocBook -->
+<html lang="en" class="page-type-section">
+<head prefix="og: http://ogp.me/ns#">
+<meta charset="utf-8">
+<title>Built-ins for hashes - Apache FreeMarker Manual</title>
+<meta http-equiv="X-UA-Compatible" content="IE=edge">
+<meta name="viewport" content="width=device-width,initial-scale=1">
+<meta name="format-detection" content="telephone=no">
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+<meta property="og:title" content="Built-ins for hashes">
+<meta property="og:locale" content="en_US">
+<meta property="og:url" content="http://freemarker.org/docs/ref_builtins_hash.html">
+<link rel="canonical" href="http://freemarker.org/docs/ref_builtins_hash.html">
+<link rel="icon" href="favicon.png" type="image/png">
+<link rel="stylesheet" type="text/css" href="http://fonts.googleapis.com/css?family=Roboto:500,700,400,300|Droid+Sans+Mono">
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+})(window,document,'script','//www.google-analytics.com/analytics.js','ga');
+ga('create', 'UA-55420501-1', 'auto');
+ga('send', 'pageview');
+</script>
+</head>
+<body itemscope itemtype="https://schema.org/Code">
+    <meta itemprop="url" content="http://freemarker.org/docs/">
+    <meta itemprop="name" content="Apache FreeMarker Manual">
+
+  <!--[if lte IE 9]>
+  <div style="background-color: #C00; color: #fff; padding: 12px 24px;">Please use a modern browser to view this website.</div>
+  <![endif]--><div class="header-top-bg"><div class="site-width header-top"><a class="logo" href="http://freemarker.org" role="banner">            <img itemprop="image" src="logo.png" alt="FreeMarker">
+</a><ul class="tabs"><li><a href="http://freemarker.org/">Home</a></li><li class="current"><a href="index.html">Manual</a></li><li><a class="external" href="api/index.html">Java API</a></li></ul><ul class="secondary-tabs"><li><a class="tab icon-heart" href="http://freemarker.org/contribute.html" title="Contribute"><span>Contribute</span></a></li><li><a class="tab icon-bug" href="https://issues.apache.org/jira/browse/FREEMARKER/" title="Report a Bug"><span>Report a Bug</span></a></li><li><a class="tab icon-download" href="http://freemarker.org/freemarkerdownload.html" title="Download"><span>Download</span></a></li></ul></div></div><div class="header-bottom-bg"><div class="site-width search-row"><a href="index.html" class="navigation-header">Manual</a><div class="navigation-header"></div><form method="get" class="search-form" action="search-results.html"><fieldset><legend class="sr-only">Search form</legend><label for="search-field" class="sr-only">Search query</label><input id="searc
 h-field" name="q" type="search" class="search-input" placeholder="Search" spellcheck="false" autocorrect="off" autocomplete="off"><button type="submit" class="search-btn"><span class="sr-only">Search</span></button></fieldset></form></div><div class="site-width breadcrumb-row"><ul class="breadcrumb" itemscope itemtype="http://schema.org/BreadcrumbList"><li class="step-0" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="index.html"><span itemprop="name">Apache FreeMarker Manual</span></a></li><li class="step-1" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="ref.html"><span itemprop="name">Template Language Reference</span></a></li><li class="step-2" itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="ref_builtins.html"><span itemprop="name">Built-in Reference</span></a></li><li class="step-3" 
 itemprop="itemListElement" itemscope itemtype="http://schema.org/ListItem"><a class="label" itemprop="item" href="ref_builtins_hash.html"><span itemprop="name">Built-ins for hashes</span></a></li></ul><div class="bookmarks" title="Bookmarks"><span class="sr-only">Bookmarks:</span><ul class="bookmark-list"><li><a href="alphaidx.html">Alpha. index</a></li><li><a href="gloss.html">Glossary</a></li><li><a href="dgui_template_exp.html#exp_cheatsheet">Expressions</a></li><li><a href="ref_builtins_alphaidx.html">?builtins</a></li><li><a href="ref_directive_alphaidx.html">#directives</a></li><li><a href="ref_specvar.html">.spec_vars</a></li><li><a href="app_faq.html">FAQ</a></li></ul></div></div></div>    <div class="main-content site-width">
+      <div class="content-wrapper">
+  <div id="table-of-contents-wrapper" class="col-left">
+      <script>var breadcrumb = ["Apache FreeMarker Manual","Template Language Reference","Built-in Reference","Built-ins for hashes"];</script>
+      <script src="toc.js?1489402528979"></script>
+      <script src="docgen-resources/main.min.js?1489402528979"></script>
+  </div>
+<div class="col-right"><div class="page-content"><div class="page-title"><div class="pagers top"><a class="paging-arrow previous" href="ref_builtins_sequence.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_builtins_node.html"><span>Next</span></a></div><div class="title-wrapper">
+<h1 class="content-header header-section1" id="ref_builtins_hash" itemprop="headline">Built-ins for hashes</h1>
+</div></div><div class="page-menu">
+<div class="page-menu-title">Page Contents</div>
+<ul><li><a class="page-menu-link" href="#ref_builtin_keys" data-menu-target="ref_builtin_keys">keys</a></li><li><a class="page-menu-link" href="#ref_builtin_values" data-menu-target="ref_builtin_values">values</a></li></ul> </div>
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_keys">keys</h2>
+
+
+          
+
+          <p>A sequence that contains all the lookup keys in the
+          hash.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#assign myHash = { &quot;name&quot;: &quot;mouse&quot;, &quot;price&quot;: 50 }&gt;
+&lt;#list myHash?keys as k&gt;
+  ${k}
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  name
+  price</pre></div>
+
+          <p>Note that not all hashes support this (ask the programmer if a
+          certain hash allows this or not).</p>
+
+          <p>Since hashes do not define an order for their sub variables in
+          general, the order in which key names are returned can be arbitrary.
+          However, some hashes maintain a meaningful order (ask the programmer
+          if a certain hash does that or not). For example, hashes created
+          with the above <code class="inline-code">{<em class="code-color">...</em>}</code>
+          syntax preserve the same order as you have specified the sub
+          variables.</p>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>To list both the keys and the values, you can use
+            <code class="inline-code">&lt;#list attrs as key,
+            value&gt;...&lt;#list&gt;</code>; see the <a href="ref_directive_list.html#ref.directive.list"><code>list</code>
+            directive</a>.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_values">values</h2>
+
+
+          
+
+          <p>A sequence that contains all the variables (the values in the
+          key-value pairs) in the hash.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#assign myHash = { &quot;name&quot;: &quot;mouse&quot;, &quot;price&quot;: 50 }&gt;
+&lt;#list myHash?values as v&gt;
+  ${v}
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  mouse
+  50</pre></div>
+
+          <p>Note that not all hashes support this (ask the programmer if a
+          certain hash allows this or not).</p>
+
+          <p>As of the order in which the values are returned, the same
+          applies as with the <code class="inline-code">keys</code> built-in; see there.
+          Furthermore, it&#39;s not guaranteed that the order of the values
+          corresponds to the order of the keys returned by the
+          <code class="inline-code">keys</code> build-in.</p>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>To list both the keys and the values, you can use
+            <code class="inline-code">&lt;#list attrs as key,
+            value&gt;...&lt;#list&gt;</code>; see the <a href="ref_directive_list.html#ref.directive.list"><code>list</code>
+            directive</a>.</p>
+            </div>
+
+        <div class="bottom-pagers-wrapper"><div class="pagers bottom"><a class="paging-arrow previous" href="ref_builtins_sequence.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_builtins_node.html"><span>Next</span></a></div></div></div></div>      </div>
+    </div>
+<div class="site-footer"><div class="site-width"><div class="footer-top"><div class="col-left sitemap"><div class="column"><h3 class="column-header">Overview</h3><ul><li><a href="http://freemarker.org/">What is FreeMarker?</a></li><li><a href="http://freemarker.org/freemarkerdownload.html">Download</a></li><li><a href="app_versions.html">Version history</a></li><li><a href="http://freemarker.org/history.html">About us</a></li><li><a itemprop="license" href="app_license.html">License</a></li></ul></div><div class="column"><h3 class="column-header">Handy stuff</h3><ul><li><a href="http://freemarker-online.kenshoo.com/">Try template online</a></li><li><a href="dgui_template_exp.html#exp_cheatsheet">Expressions cheatsheet</a></li><li><a href="ref_directive_alphaidx.html">#directives</a></li><li><a href="ref_builtins_alphaidx.html">?built_ins</a></li><li><a href="ref_specvar.html">.special_vars</a></li></ul></div><div class="column"><h3 class="column-header">Community</h3><ul><li><a href
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+Last generated:
+<time itemprop="dateModified" datetime="2017-03-13T10:55:28Z" title="Monday, March 13, 2017 10:55:28 AM GMT">2017-03-13 10:55:28 GMT</time>, for Freemarker 2.3.26 </p>
+<p class="copyright">
+© <span itemprop="copyrightYear">1999</span>–2017
+<a itemtype="http://schema.org/Organization" itemprop="copyrightHolder" href="http://apache.org/">The Apache Software Foundation</a>. Apache FreeMarker, FreeMarker, Apache Incubator, Apache, the Apache FreeMarker logo are trademarks of The Apache Software Foundation. </p>
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http://git-wip-us.apache.org/repos/asf/incubator-freemarker-site/blob/52c070a9/builds/2.3.26-nightly/ref_builtins_loop_var.html
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+  </div>
+<div class="col-right"><div class="page-content"><div class="page-title"><div class="pagers top"><a class="paging-arrow previous" href="ref_builtins_node.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_builtins_type_independent.html"><span>Next</span></a></div><div class="title-wrapper">
+<h1 class="content-header header-section1" id="ref_builtins_loop_var" itemprop="headline">Loop variable built-ins</h1>
+</div></div><div class="page-menu">
+<div class="page-menu-title">Page Contents</div>
+<ul><li><a class="page-menu-link" href="#ref_builtin_counter" data-menu-target="ref_builtin_counter">counter</a></li><li><a class="page-menu-link" href="#ref_builtin_has_next" data-menu-target="ref_builtin_has_next">has_next</a></li><li><a class="page-menu-link" href="#ref_builtin_index" data-menu-target="ref_builtin_index">index</a></li><li><a class="page-menu-link" href="#ref_builtin_is_even_item" data-menu-target="ref_builtin_is_even_item">is_even_item</a></li><li><a class="page-menu-link" href="#ref_builtin_is_first" data-menu-target="ref_builtin_is_first">is_first</a></li><li><a class="page-menu-link" href="#ref_builtin_is_last" data-menu-target="ref_builtin_is_last">is_last</a></li><li><a class="page-menu-link" href="#ref_builtin_is_odd_item" data-menu-target="ref_builtin_is_odd_item">is_odd_item</a></li><li><a class="page-menu-link" href="#ref_builtin_item_cycle" data-menu-target="ref_builtin_item_cycle">item_cycle</a></li><li><a class="page-menu-link" href="#ref_builtin_item
 _parity" data-menu-target="ref_builtin_item_parity">item_parity</a></li><li><a class="page-menu-link" href="#ref_builtin_item_parity_cap" data-menu-target="ref_builtin_item_parity_cap">item_parity_cap</a></li></ul> </div>  <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+          <p>Loop variable built-ins only exists since FreeMarker
+          2.3.23.</p>
+          </div>
+<p>These built-ins you can only use with the loop variable of the
+        <a href="ref_directive_list.html"><code>list</code> and
+        <code>items</code> directives</a> (and of the deprecated
+        <code class="inline-code">foreach</code> directive). Some explanation of that
+        follows (<code class="inline-code"><em class="code-color">loopVar</em>?index</code>
+        returns the 0-based index in the listable value we iterate
+        through):</p>
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#-- Note: x is a loop variable --&gt;
+&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as x&gt;
+  ${x?index}
+&lt;/#list&gt;</pre></div>
+
+<div class="code-wrapper"><pre class="code-block code-output">0
+1
+2</pre></div><p>When the <code class="inline-code">list</code> directive doesn&#39;t specify the
+        loop variable, these built-ins are used with the loop variable of the
+        <code class="inline-code">items</code> directive:</p>
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;]&gt;
+  &lt;ul&gt;
+   &lt;#items as x&gt;
+     &lt;li&gt;${x?index}&lt;/li&gt;
+   &lt;/#items&gt;
+  &lt;/ul&gt;
+&lt;/#list&gt;</pre></div><p>Loop variable built-ins only use the <em>name</em>
+        of loop variable, so that they can identify the related ongoing
+        iteration. They don&#39;t read the <em>value</em> of the loop
+        variable. Hence, this is a parsing error:</p>
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as x&gt;
+  &lt;#assign y = x&gt;
+  ${y?index} &lt;#-- ERROR: y isn&#39;t a loop variable --&gt;
+&lt;/#list&gt;</pre></div>
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_counter">counter</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Returns the 1-based index where the iteration (which is
+          identified by the loop variable name) currently stands.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as i&gt;
+  ${i?counter}: ${i}
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  1: a
+  2: b
+  3: c</pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>For the 0-based index, use the <a href="#ref_builtin_index"><code>index</code>
+            built-in</a>.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_has_next">has_next</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Tells if the item where the iteration (which is identified by
+          the loop variable name) currently stands is not the last
+          item.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as i&gt;${i?has_next?c} &lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">true true false </pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>For separating items with commas and such, use
+            <code class="inline-code">&lt;#sep&gt;<em class="code-color">separator</em>&lt;/#sep&gt;</code>
+            instead of <code class="inline-code">&lt;#if
+            <em class="code-color">var</em>?has_next&gt;<em class="code-color">separator</em>&lt;/#if&gt;</code>,
+            as it&#39;s more readable. (Furthermore the
+            <code class="inline-code">&lt;/#sep&gt;</code> can be often omitted, like in
+            <code class="inline-code">&lt;#list <em class="code-color">...</em> as
+            <em class="code-color">var</em>&gt;<em class="code-color">...</em>${<em class="code-color">var</em>}<em class="code-color">...</em>&lt;#sep&gt;<em class="code-color">separator</em>&lt;/#list&gt;</code>)</p>
+            </div>
+
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>If you need the inverse of this built-in, use
+            <code class="inline-code"><em class="code-color">var</em>?is_last</code> instead
+            of <code class="inline-code">!<em class="code-color">var</em>?has_next</code>,
+            because it&#39;s more readable.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_index">index</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Returns the 0-based index where the iteration (which is
+          identified by the loop variable name) currently stands.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as i&gt;
+  ${i?index}: ${i}
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  0: a
+  1: b
+  2: c</pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>For the 1-based index, use the <a href="#ref_builtin_counter"><code>counter</code>
+            built-in</a>.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_is_even_item">is_even_item</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Tells if the item where the iteration (which is identified by
+          the loop variable name) currently stands has an even 1-based
+          index.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;d&#39;] as i&gt;${i?is_even_item?c} &lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">false true false true</pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>To make tables with alternating row colors and such, use
+            <a href="#ref_builtin_item_parity"><code><em>var</em>?item_parity</code></a>
+            or <a href="#ref_builtin_item_cycle"><code><em>var</em>?item_cycle(...)</code></a>
+            instead.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_is_first">is_first</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Tells if the item where the iteration (which is identified by
+          the loop variable name) currently stands is the first item.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as i&gt;${i?is_first?c} &lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">true false false </pre></div>
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_is_last">is_last</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Tells if the item where the iteration (which is identified by
+          the loop variable name) currently stands is the last item.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;] as i&gt;${i?is_last?c} &lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">false false true</pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>If you need the inverse of this built-in, use
+            <code class="inline-code"><em class="code-color">var</em>?has_next</code> instead
+            of <code class="inline-code">!<em class="code-color">var</em>?is_last</code>,
+            because it&#39;s more readable.</p>
+            </div>
+
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>For separating items with commas and such, use
+            <code class="inline-code">&lt;#sep&gt;<em class="code-color">separator</em>&lt;/#sep&gt;</code>
+            instead of <code class="inline-code">&lt;#if
+            <em class="code-color">var</em>?has_next&gt;<em class="code-color">separator</em>&lt;/#if&gt;</code>,
+            as it&#39;s more readable. (Furthermore the
+            <code class="inline-code">&lt;/#sep&gt;</code> can be often omitted, like in
+            <code class="inline-code">&lt;#list <em class="code-color">...</em> as
+            <em class="code-color">var</em>&gt;<em class="code-color">...</em>${<em class="code-color">var</em>}<em class="code-color">...</em>&lt;#sep&gt;<em class="code-color">separator</em>&lt;/#list&gt;</code>)</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_is_odd_item">is_odd_item</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Tells if the item where the iteration (which is identified by
+          the loop variable name) currently stands has an odd 1-based
+          index.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;d&#39;] as i&gt;${i?is_odd_item?c} &lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">true false true false </pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>To make tables with alternating row colors and such, use
+            <a href="#ref_builtin_item_parity"><code><em>var</em>?item_parity</code></a>
+            or <a href="#ref_builtin_item_cycle"><code><em>var</em>?item_cycle(...)</code></a>
+            instead.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_item_cycle">item_cycle</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>This is a more generic version of the <a href="#ref_builtin_item_parity"><code>item_parity</code>
+          built-in</a>, where you can specify what value to use instead of
+          <code class="inline-code">&quot;odd&quot;</code> and <code class="inline-code">&quot;even&quot;</code>. It also
+          allows more than 2 values that it will cycle through.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;d&#39;, &#39;e&#39;, &#39;f&#39;, &#39;g&#39;] as i&gt;
+  &lt;tr class=&quot;${i?item_cycle(&#39;row1&#39;, &#39;row2&#39;, &#39;row3&#39;)}&quot;&gt;${i}&lt;/tr&gt;
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  &lt;tr class=&quot;row1&quot;&gt;a&lt;/tr&gt;
+  &lt;tr class=&quot;row2&quot;&gt;b&lt;/tr&gt;
+  &lt;tr class=&quot;row3&quot;&gt;c&lt;/tr&gt;
+  &lt;tr class=&quot;row1&quot;&gt;d&lt;/tr&gt;
+  &lt;tr class=&quot;row2&quot;&gt;e&lt;/tr&gt;
+  &lt;tr class=&quot;row3&quot;&gt;f&lt;/tr&gt;
+  &lt;tr class=&quot;row1&quot;&gt;g&lt;/tr&gt;</pre></div>
+
+          <p>Some details:</p>
+
+          <ul>
+            <li>
+              <p>The number of arguments must be at least 1, and has no
+              upper limit.</p>
+            </li>
+
+            <li>
+              <p>The type of the arguments can be anything, they doesn&#39;t
+              have to be strings.</p>
+            </li>
+          </ul>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>Use the <a href="#ref_builtin_item_parity"><code>item_parity</code>
+            built-in</a> instead if the values you need are
+            <code class="inline-code">&quot;odd&quot;</code> and <code class="inline-code">&quot;even&quot;</code>.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_item_parity">item_parity</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Returns <code class="inline-code">&quot;odd&quot;</code> or <code class="inline-code">&quot;even&quot;</code>
+          string value, depending on the parity of the 1-based index where the
+          iteration (which is identified by the loop variable name) currently
+          stands. This is commonly used for alternating color for table
+          rows:</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;d&#39;] as i&gt;
+  &lt;tr class=&quot;${i?item_parity}Row&quot;&gt;${i}&lt;/tr&gt;
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  &lt;tr class=&quot;oddRow&quot;&gt;a&lt;/tr&gt;
+  &lt;tr class=&quot;evenRow&quot;&gt;b&lt;/tr&gt;
+  &lt;tr class=&quot;oddRow&quot;&gt;c&lt;/tr&gt;
+  &lt;tr class=&quot;evenRow&quot;&gt;d&lt;/tr&gt;</pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>Use the <a href="#ref_builtin_item_parity"><code>item_parity_cap</code>
+            built-in</a> for capitalized <code class="inline-code">&quot;Odd&quot;</code> and
+            <code class="inline-code">&quot;Even&quot;</code>. Use the <a href="#ref_builtin_item_cycle"><code>item_cycle</code>
+            built-in</a> to specify custom values, or more then two
+            values.</p>
+            </div>
+
+        
+          
+
+
+
+<h2 class="content-header header-section2" id="ref_builtin_item_parity_cap">item_parity_cap</h2>
+
+
+          
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>This built-in is available since FreeMarker 2.3.23.</p>
+            </div>
+
+
+          <p>Returns <code class="inline-code">&quot;Odd&quot;</code> or <code class="inline-code">&quot;Even&quot;</code>
+          string value (note the capitalization), depending on the parity of
+          the 1-based index where the iteration (which is identified by the
+          loop variable name) currently stands.</p>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-template">&lt;#list [&#39;a&#39;, &#39;b&#39;, &#39;c&#39;, &#39;d&#39;] as i&gt;
+  &lt;tr class=&quot;row${i?item_parity_cap}&quot;&gt;${i}&lt;/tr&gt;
+&lt;/#list&gt;</pre></div>
+
+          
+
+<div class="code-wrapper"><pre class="code-block code-output">  &lt;tr class=&quot;rowOdd&quot;&gt;a&lt;/tr&gt;
+  &lt;tr class=&quot;rowEven&quot;&gt;b&lt;/tr&gt;
+  &lt;tr class=&quot;rowOdd&quot;&gt;c&lt;/tr&gt;
+  &lt;tr class=&quot;rowEven&quot;&gt;d&lt;/tr&gt;</pre></div>
+
+            <div class="callout note">
+    <strong class="callout-label">Note:</strong>
+
+            <p>Use the <a href="#ref_builtin_item_parity"><code>item_parity</code>
+            built-in</a> for lower case <code class="inline-code">&quot;odd&quot;</code> and
+            <code class="inline-code">&quot;even&quot;</code>.</p>
+            </div>
+
+        <div class="bottom-pagers-wrapper"><div class="pagers bottom"><a class="paging-arrow previous" href="ref_builtins_node.html"><span>Previous</span></a><a class="paging-arrow next" href="ref_builtins_type_independent.html"><span>Next</span></a></div></div></div></div>      </div>
+    </div>
+<div class="site-footer"><div class="site-width"><div class="footer-top"><div class="col-left sitemap"><div class="column"><h3 class="column-header">Overview</h3><ul><li><a href="http://freemarker.org/">What is FreeMarker?</a></li><li><a href="http://freemarker.org/freemarkerdownload.html">Download</a></li><li><a href="app_versions.html">Version history</a></li><li><a href="http://freemarker.org/history.html">About us</a></li><li><a itemprop="license" href="app_license.html">License</a></li></ul></div><div class="column"><h3 class="column-header">Handy stuff</h3><ul><li><a href="http://freemarker-online.kenshoo.com/">Try template online</a></li><li><a href="dgui_template_exp.html#exp_cheatsheet">Expressions cheatsheet</a></li><li><a href="ref_directive_alphaidx.html">#directives</a></li><li><a href="ref_builtins_alphaidx.html">?built_ins</a></li><li><a href="ref_specvar.html">.special_vars</a></li></ul></div><div class="column"><h3 class="column-header">Community</h3><ul><li><a href
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+Last generated:
+<time itemprop="dateModified" datetime="2017-03-13T10:55:28Z" title="Monday, March 13, 2017 10:55:28 AM GMT">2017-03-13 10:55:28 GMT</time>, for Freemarker 2.3.26 </p>
+<p class="copyright">
+© <span itemprop="copyrightYear">1999</span>–2017
+<a itemtype="http://schema.org/Organization" itemprop="copyrightHolder" href="http://apache.org/">The Apache Software Foundation</a>. Apache FreeMarker, FreeMarker, Apache Incubator, Apache, the Apache FreeMarker logo are trademarks of The Apache Software Foundation. </p>
+</div></div></div></body>
+</html>


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