title: How we can overwrite class name of the object.?
body: <p>How we can overwrite the class name of an object ?</p>
  
  <pre><code>Example: 
  $ irb
  irb(main):001:0&gt; class Man
  irb(main):002:1&gt; end
  =&gt; nil
  irb(main):003:0&gt; obj = Man.new
  =&gt; #&lt;Man:0xb7756464&gt;
  irb(main):004:0&gt; puts obj.class
  Man
  =&gt; nil
  </code></pre>
  
  <p>I want some thing like that</p>
  
  <pre><code>puts obj.class 
  Van instead of Man
   =&gt; nil
  </code></pre>