title: Callback function syntax - why is this not allowed?
body: <p><code>function callbackFn(res){console.log(res)}</code></p>
  <p>I can write
  <code>$.get(&quot;./a&quot;, function(response) {callbackFn(response)});</code></p>
  <p>Why can't I write
  <code>$.get(&quot;./a&quot;, callbackFn(response));</code></p>