During the execution of a computed observable's evaluator function, you can access
ko.computedContext to get information about the current computed property. It provides the following functions:
isInitial(): This is a function that returns true if called during the first ever evaluation of the current computed observable, or false otherwise. For
isInitial()is always undefined.
getDependenciesCount(): This returns the number of dependencies of the computed observable detected so far during the current evaluation.
ko.computedContext.getDependenciesCount() function is equivalent to calling
getDependenciesCount() on the computed observable itself. The reason that it also exists on