title: How to retrieve function's 'this' object?
body: <p>Let's say I have a function object (passed via parameter for example). I want to call the function with parameters stored in an array. This is usually done using <code>apply()</code>.</p>
  
  <p>However, <code>apply()</code> also requires a <code>this</code> argument, which I don't have. Can I somehow get it from the function object?</p>