title: How to update an observable in a computed without triggering the computed?
body: <p>I have a particular knockout observable that's used in many computed functions and it works exactly as it's supposed to. However on one of these computed functions I do NOT want it to trigger when the observable is updated. Code wise it would look something like this:</p>
  
  <pre><code>  self.obs1 = ko.observable(foo);
    self.obs2 = ko.observable(bar);
  
    //I want this computed to behave normally
    this.comp1 = ko.computed(function() {
      return self.obs1() + self.obs2();
    }, this);
  
    //I want this computed to trigger on obs1 update but ignore updates to obs2
    this.comp2 = ko.computed(function() {
      return self.obs1() + self.obs2();
    }, self);
  
    setTimeout(function() {
      self.obs1(20);
      self.obs2(15);    
    }, 1000);
  </code></pre>
  
  <p><a href="https://jsfiddle.net/r73yLk5u/" rel="nofollow">https://jsfiddle.net/r73yLk5u/</a></p>
  
  <p>Note that I do still need to be able to access the current value of obs2 when comp2 is executed I just dont want the update of obs2 to trigger comp2 to have a new value.</p>
  
  <p>Is this possible?</p>