Learning about new array functions
In this section, we will review the many methods added for manipulating arrays in ES6. It is a very important section as you will have to deal with arrays frequently in JavaScript programming, and using these performance-optimized methods is preferable over creating your own. The use of these standard methods also makes code more consistent and readable by other developers on your team. We will take advantage of these methods extensively in both our React and Node development. Let's get started.
find
The find keyword allows you to grab the first instance of an element from an array that matches your search criteria. Let's look at a simple example. Create find.ts and add the following code:
const items = [
{ name: 'jon', age: 20 },
{ name: 'linda', age: 22 },
{ name: 'jon', age: 40}
]
const jon = items.find((item) => {
...