few of my favourite topics in JS.
In this lesson we will get introduced to the Observable type. An Observable is a collection that arrives over time. Observables can be used to model events, asynchronous requests, and animations. Observables can also be transformed, combined, and consumed using the Array methods we learned in the previous lessons. We can write powerful and expressive asynchronous programs using the few simple methods we've learned so far.
By utilizing immutable data structures, we can write code that is easier to reason about, avoid mutation-related bugs, reduce complexity, and even gain some performance benefits along the way.
Before diving too far into Facebook's Immutable.js library, let's take a moment to examine some of the pains and obstacles that mutable data structures present.
Array to use Immutable.List in order to address a mutation-related "bug" caused by multiple objects "sharing" a mutable structure (array) by reference.