In the previous post I gave a glimpse of the Javascript Promises Pattern (JPP). Now we are going to take a more in deep look into it and implement our (simplified) version of this pattern.
First of all, let’s sow the code I we defined works: we had three operations (to make the example simpler, they all share the same code, but this is not a requisite), each of them expecting a set of arguments which are processed by an asynchronous operation.
I am sure you have heard about the javascript Promises Pattern, but if you haven’t, here is a quick and simple definition: a promise or future is an object that represents a future result, not yet obtained or calculated (here you have a more complete definition). In fact, what is really nice about it is that allows you to define callbacks for async code in and more elegant and readable way.
