title: Knockout arrayForEach undefined property
body: <p>I'm having trouble trying to get a number from each item in a knockout observable array and add the numbers together and assign it to another computed variable. Here's what I have right now...</p>
  
  <pre><code>Semesters: ko.observableArray([
      {
          semesterName: "Fall",
          semesterCode: "300",
          PlannedCourses: ko.observableArray([]),
          totalCredits: ko.computed(function(){
              var total = 0;
              ko.utils.arrayForEach(this.PlannedCourses, function (course) {
                  total += course.MinHours();
              });
  
              return total;
          }),
      },
      ...
  </code></pre>
  
  <p>What I'm trying to do is, in the totalCredits variable, I'm trying to iterate through the PlannedCourses array and get the MinHours variable for each item and add them together in the total variable. Then I return it to the totalCredits item in the Semesters array. The issue I'm having is getting the PlannedCourses variable in the ko.utils.arrayForEach part. I'm getting an undefined on it and I'm not sure why. I think it's a simple syntax error but I can't see what's wrong.</p>
  
  <p>The PlannedCourses observable array is a dynamic object that is getting the list of PlannedCourses properly. It's defined in the context of itself but I'm not passing it to the totalCredits computed function properly.</p>
  
  <p>I hope this is clear enough. Thank you for your help!</p>
  
  <p>Note: All the rest of the code is working as intended. The only part that isn't working is the totalCredits computed function. I'm not sure if anything within the ko.utils.arrayForEach is working as I haven't been able to get that far.</p>