Track Number Of Evaluations In Knockout

I would like to know how to I track the number of evaluation in knockout observable array for GetArray1() and GetArray2() below. I have read a sample from this fiddle link but not

Solution 1:

well in the link you provided they are creating a function using fn which has the computation logic for getting the re-evaluation count

Better way would be using inbuilt functions isInitial and getDependenciesCount of computed under computedContext .

Logic :

 ko.computed(function () {
     var subscribe = self.sampleArray(); //declared on top to subscribe initiallyif (ko.computedContext.isInitial()) returntrue;
     var count = ko.computedContext.getDependenciesCount();
     self.revaluationCount(self.revaluationCount() + count);
 });

As per Docs :

isInitial() — A function that returns true if called during the first ever evaluation of the current computed observable, or false otherwise. For pure computed observables, isInitial() is always undefined.

getDependenciesCount() — Returns the number of dependencies of the computed observable detected so far during the current evaluation.

Check here for complete documentation .

working sample with complete code here