title: What is the -> (stab) operator in Ruby?
body: <p>In the following example:</p>
  
  <pre><code>default: -&gt; { Time.now }
  </code></pre>
  
  <p>What's <code>-&gt;</code>? I am familiar with <code>=&gt;</code> but first time I am seeing <code>-&gt;</code>.</p>