title: jQuery fix for "Uncaught TypeError: $ is not a function" error
body: <p>My code:</p>
  
  <pre><code>&lt;script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"&gt;&lt;/script&gt;      
  &lt;script src="http://someothersite.com/external.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p>external.js:</p>
  
  <pre><code>$("head").append(unescape(""));
  </code></pre>
  
  <p>Unfortunately I am getting the following error when I include my external script:</p>
  
  <blockquote>
    <p>Uncaught TypeError: $ is not a function</p>
  </blockquote>
  
  <p>How do I fix this? Please bear in mind I can't edit the external Javascript file as it's third party.</p>