In this section, we'll look at immutable lists and maps. These are viable substitutes for arrays and plain objects, respectively, in our Flux store data. Then, we'll look at how
Immutable.js can compose complex transformations without the need for intermediary representations. Finally, we'll see how
Immutable.js returns the same instance when there's no mutations after running through a transformation, allowing for efficient change detection.
Immutable lists and maps
We'll start ...