title: Object default String conversion method in Ruby
body: <p>Is there a default Object to String conversion method in Ruby just like the Java <a href="http://docs.oracle.com/javase/7/docs/api/java/lang/Object.html#toString%28%29" rel="nofollow">Object.toString()</a>?</p>
  
  <p>If so, in what operations is it invoked by default? (ex. Object concatenates to a String, puts arguments, etc.)</p>