title: <Int> == <String>
body: <p>Why can I compare an Int and a String in Scala with ==, like <code>1=="2"</code>, even when this Operator is not defined for a String in the API (<a href="http://www.scala-lang.org/api/2.11.8/index.html#scala.Int" rel="nofollow">http://www.scala-lang.org/api/2.11.8/index.html#scala.Int</a>)?</p>