title: is groovy weakly typed or strongly typed?
body: <p>I don't understand how groovy typing works. On <a href="http://en.wikipedia.org/wiki/Groovy_%28programming_language%29" rel="nofollow">wikipedia</a> it is written that it has a strong typing, but I can perfectly do that on the interpreter :</p>
  
  <pre><code>1 + '1'
  ==&gt; 11
  </code></pre>
  
  <p>So maybe I am confused and I didn't understand what weak typing is, but I'd like to know what this feature is then.</p>