‫React is a JavaScript library,
‫and therefore you will need a good understanding
‫of some essential JavaScript fundamentals,
‫so if your JavaScript is a bit rusty,
‫then this section is for you.
‫So we're gonna review topics
‫such as destructuring, the spread operator,
‫template literals, ternaries, and asynchronous JavaScript
‫with promises and async/await.
‫Now, one of the things we do all the time in React
‫is to work with immutable arrays,
‫and so we will spend some time
‫with the important array methods,
‫map, filter, reduce and sort.
‫Now, if you already know all these things,
‫then please feel free to just skip this entire section
‫and move right to the next one.
‫(pleasant synth rock music)