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  <title>Module: OpenStructable</title>
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    <div id="classHeader">
        <table class="header-table">
        <tr class="top-aligned-row">
          <td><strong>Module</strong></td>
          <td class="class-name-in-header">OpenStructable</td>
        </tr>
        <tr class="top-aligned-row">
            <td><strong>In:</strong></td>
            <td>
                <a href="../files/lib/carat/ostructable_rb.html">
                lib/carat/ostructable.rb
                </a>
        <br />
            </td>
        </tr>

        </table>
    </div>
  <!-- banner header -->

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  <div id="contextContent">

    <div id="description">
      <h1><a href="OpenStructable.html">OpenStructable</a></h1>
<p>
OpensStructable is a mixin module which can provide OpenStruct behavior to
any class or object. <a href="OpenStructable.html">OpenStructable</a>
allows extention of data objects with arbitrary attributes.
</p>
<h2>Usage</h2>
<pre>
  require 'raspberry/new/ostructable'

  class Record
    include OpenStructable
  end

  record = Record.new
  record.name    = &quot;John Smith&quot;
  record.age     = 70
  record.pension = 300

  puts record.name     # -&gt; &quot;John Smith&quot;
  puts record.address  # -&gt; nil
</pre>
<h2>TODO</h2>
<ul>
<li>Keep this uptodate with ostruct.rb.

</li>
<li>See if Matz will accept it into core so we don&#8217;t have to anymore!

</li>
<li>As with OpenStruct, marshalling is problematic at the moment.

</li>
</ul>
<h2>Author(s)</h2>
<ul>
<li>Yukihiro Matsumoto

</li>
<li>Gavin Sinclair (Documentation)

</li>
<li>Thomas Sawyer

</li>
</ul>
<h2>History</h2>
<ul>
<li>2005.04.11 Passed basic test.

</li>
</ul>

    </div>


   </div>

    <div id="method-list">
      <h3 class="section-bar">Methods</h3>

      <div class="name-list">
      <a href="#M000625">==</a>&nbsp;&nbsp;
      <a href="#M000623">delete_field</a>&nbsp;&nbsp;
      <a href="#M000620">initialize_copy</a>&nbsp;&nbsp;
      <a href="#M000624">inspect</a>&nbsp;&nbsp;
      <a href="#M000621">new_ostruct_member</a>&nbsp;&nbsp;
      <a href="#M000622">update</a>&nbsp;&nbsp;
      </div>
    </div>

  </div>


    <!-- if includes -->

    <div id="section">





      


    <!-- if method_list -->
    <div id="methods">
      <h3 class="section-bar">Public Instance methods</h3>

      <div id="method-M000625" class="method-detail">
        <a name="M000625"></a>

        <div class="method-heading">
          <a href="#M000625" class="method-signature">
          <span class="method-name">==</span><span class="method-args">(other)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p>
Compare this object and <tt>other</tt> for equality.
</p>
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000625-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000625-source">
<pre>
<span class="ruby-comment cmt"># File lib/carat/ostructable.rb, line 120</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-operator">==</span>(<span class="ruby-identifier">other</span>)
    <span class="ruby-keyword kw">return</span> <span class="ruby-keyword kw">false</span> <span class="ruby-keyword kw">unless</span>(<span class="ruby-identifier">other</span>.<span class="ruby-identifier">kind_of?</span>(<span class="ruby-constant">OpenStruct</span>))
    <span class="ruby-keyword kw">return</span> <span class="ruby-ivar">@__table__</span> <span class="ruby-operator">==</span> <span class="ruby-identifier">other</span>.<span class="ruby-identifier">table</span>
  <span class="ruby-keyword kw">end</span>
</pre>
          </div>
        </div>
      </div>

      <div id="method-M000623" class="method-detail">
        <a name="M000623"></a>

        <div class="method-heading">
          <a href="#M000623" class="method-signature">
          <span class="method-name">delete_field</span><span class="method-args">(name)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p>
Remove the named field from the object.
</p>
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000623-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000623-source">
<pre>
<span class="ruby-comment cmt"># File lib/carat/ostructable.rb, line 96</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">delete_field</span>(<span class="ruby-identifier">name</span>)
    <span class="ruby-ivar">@__table__</span> <span class="ruby-operator">||=</span> {}
    <span class="ruby-ivar">@__table__</span>.<span class="ruby-identifier">delete</span> <span class="ruby-identifier">name</span>.<span class="ruby-identifier">to_sym</span>
  <span class="ruby-keyword kw">end</span>
</pre>
          </div>
        </div>
      </div>

      <div id="method-M000620" class="method-detail">
        <a name="M000620"></a>

        <div class="method-heading">
          <a href="#M000620" class="method-signature">
          <span class="method-name">initialize_copy</span><span class="method-args">(orig)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p>
Duplicate an OpenStruct object members.
</p>
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000620-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000620-source">
<pre>
<span class="ruby-comment cmt"># File lib/carat/ostructable.rb, line 46</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">initialize_copy</span>(<span class="ruby-identifier">orig</span>)
    <span class="ruby-keyword kw">super</span>
    <span class="ruby-ivar">@__table__</span> = <span class="ruby-ivar">@__table__</span>.<span class="ruby-identifier">dup</span>
  <span class="ruby-keyword kw">end</span>
</pre>
          </div>
        </div>
      </div>

      <div id="method-M000624" class="method-detail">
        <a name="M000624"></a>

        <div class="method-heading">
          <a href="#M000624" class="method-signature">
          <span class="method-name">inspect</span><span class="method-args">()</span>
          </a>
        </div>
      
        <div class="method-description">
          <p>
Returns a string containing a detailed summary of the keys and values.
</p>
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000624-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000624-source">
<pre>
<span class="ruby-comment cmt"># File lib/carat/ostructable.rb, line 104</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">inspect</span>
    <span class="ruby-identifier">str</span> = <span class="ruby-node">&quot;&lt;#{self.class}&quot;</span>
    <span class="ruby-keyword kw">for</span> <span class="ruby-identifier">k</span>,<span class="ruby-identifier">v</span> <span class="ruby-keyword kw">in</span> (<span class="ruby-ivar">@__table__</span> <span class="ruby-operator">||=</span> {})
      <span class="ruby-identifier">str</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-node">&quot; #{k}=#{v.inspect}&quot;</span>
    <span class="ruby-keyword kw">end</span>
    <span class="ruby-identifier">str</span> <span class="ruby-operator">&lt;&lt;</span> <span class="ruby-value str">&quot;&gt;&quot;</span>
  <span class="ruby-keyword kw">end</span>
</pre>
          </div>
        </div>
      </div>

      <div id="method-M000621" class="method-detail">
        <a name="M000621"></a>

        <div class="method-heading">
          <a href="#M000621" class="method-signature">
          <span class="method-name">new_ostruct_member</span><span class="method-args">(name)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000621-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000621-source">
<pre>
<span class="ruby-comment cmt"># File lib/carat/ostructable.rb, line 51</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">new_ostruct_member</span>(<span class="ruby-identifier">name</span>)
    <span class="ruby-keyword kw">self</span>.<span class="ruby-identifier">instance_eval</span> <span class="ruby-node">%{
      def #{name}; @__table__[:#{name}]; end
      def #{name}=(x); @__table__[:#{name}] = x; end
    }</span>
  <span class="ruby-keyword kw">end</span>
</pre>
          </div>
        </div>
      </div>

      <div id="method-M000622" class="method-detail">
        <a name="M000622"></a>

        <div class="method-heading">
          <a href="#M000622" class="method-signature">
          <span class="method-name">update</span><span class="method-args">(hash)</span>
          </a>
        </div>
      
        <div class="method-description">
          <p>
Generate additional attributes and values.
</p>
          <p><a class="source-toggle" href="#"
            onclick="toggleCode('M000622-source');return false;">[Source]</a></p>
          <div class="method-source-code" id="M000622-source">
<pre>
<span class="ruby-comment cmt"># File lib/carat/ostructable.rb, line 61</span>
  <span class="ruby-keyword kw">def</span> <span class="ruby-identifier">update</span>(<span class="ruby-identifier">hash</span>)
    <span class="ruby-ivar">@__table__</span> <span class="ruby-operator">||=</span> {}
    <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">hash</span>
      <span class="ruby-keyword kw">for</span> <span class="ruby-identifier">k</span>,<span class="ruby-identifier">v</span> <span class="ruby-keyword kw">in</span> <span class="ruby-identifier">hash</span>
        <span class="ruby-ivar">@__table__</span>[<span class="ruby-identifier">k</span>.<span class="ruby-identifier">to_sym</span>] = <span class="ruby-identifier">v</span>
        <span class="ruby-identifier">new_ostruct_member</span>(<span class="ruby-identifier">k</span>)
      <span class="ruby-keyword kw">end</span>
    <span class="ruby-keyword kw">end</span>
  <span class="ruby-keyword kw">end</span>
</pre>
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