title: Javascript Combining Variables inside an Object
body: <p>Okay this seems really simple but I just can't get it to work. I need to combine variables in an obect. Something like this:</p>
  
  <pre><code>var i = {
      a: 1,
      b: " sheep",
      c: this.a + this.b
  }
  </code></pre>
  
  <p>So that later on I can do something like:</p>
  
  <pre><code>i.a = 3;
  console.log(i.c);
  </code></pre>
  
  <p>and get "3 sheep".</p>
  
  <p>Is this just silly? Or what is the closest thing to it?</p>