Removing incidental complexity with RxClojure

In Chapter 2, A Look at Reactive Extensions, we learned about the basic building blocks of RxClojure, an open source CES framework. In this section, we'll use this knowledge to remove the incidental complexity from our program. This will give us a clear, declarative way to display both prices and rolling averages.

The UI code we've written so far remains unchanged, but we need to make sure that RxClojure is declared in the dependencies section of our project.clj file:

[io.reactivex/rxclojure "1.0.0"] 

Then, we must ensure that we have the following library:

(ns stock-market-monitor.core 
  (:require [rx.lang.clojure.core :as rx] 
            [seesaw.core :refer :all]) 
  (:import (java.util.concurrent TimeUnit) 
           (rx Observable))) 

The way we will approach the problem this time is also different. Let&apos...