title: knockout subscribe to observables needed?
body: <p>I have a form with four input fields. I need to update the res (3) when one is updated from the UI. Meaning the one that is updated could be any of the four.</p>
  
  <pre><code>myViewModel.four.subscribe(function(newValue) {
  
  //update one here
  //update two here
  //update three here
  
  }); 
  </code></pre>
  
  <p>and so on..... </p>
  
  <pre><code>myViewModel.one.subscribe(function(newValue) {
  
  
  //update two here
  //update three here
  //update four here
  
  }); 
  </code></pre>
  
  <p>but how should I update the ones inside the method? To me it would look like a Stack Overflow situation... </p>