Like Objects, Arrays are required to get almost anything done in JavaScript. We'll look at the Array type in great detail, focusing particular how some built-in higher-order functions can make quick work of common jobs.

Using our knowledge of how higher order functions on the Array prototype work, we'll implement our own map, filter, reduce and forEach functions.

Control flow statements like if and switch give us the ability to define various paths that our program can take, under different circumstances. We'll look at how these work in detail, including some non-traditional (but very useful) use cases.

Progressive Web Apps often need to store data in some durable medium. It's a good idea to version long-living data since old data may need to work with new versions of the application. We'll use our newfound knowledge of control flow statements to "upgrade" a versioned data structure to the current version, so that the rest of our app need not worry about it.

While you're no doubt familiar with a while or for loop, there are other mechanisms in JavaScript for iterating over data (some of which are very new). We'll look at the differences between things like for..in and for..of loops, and refresh ourselves with often-forgotten concepts like do..while.

Implement a function that returns a Fibonacci sequence of a specified length. Ensure that your solution works for sequences up to 10 million numbers long!

We'll recap all the ground we've covered today, and set our sights on tomorrow's agenda.