title: How to push an array into a hash in ruby
body: <p>I didn't find in the internet something that answers specifically my question.</p>
  
  <p>I have a hash as follows:</p>
  
  <pre><code>hash = {[1111, 4, 20]}
  </code></pre>
  
  <p>And i want to push another array (<code>[3333, 2, 70]</code>) to that hash to get something like: </p>
  
  <pre><code>hash = {[1111, 4, 20], [3333, 2, 70]}
  </code></pre>
  
  <p>How can achieve this ?</p>
  
  <p>Thanks!</p>