title: Ruby optional parameters
body: <p>If I define a Ruby functions like this:</p>
  
  <pre><code>def ldap_get ( base_dn, filter, scope=LDAP::LDAP_SCOPE_SUBTREE, attrs=nil )
  </code></pre>
  
  <p>How can I call it supplying only the first 2 and the last args? Why isn't something like</p>
  
  <pre><code>ldap_get( base_dn, filter, , X)
  </code></pre>
  
  <p>possible or if it is possible, how can it be done?</p>