Arrays are a fundamental building block in most Javascript applications. Being proficient with array manipulation methods is crucial for productive development.
While standard loops can accomplish most array tasks, native methods usually provide a simpler and more concise solution.
Over the last few years, Javascript has added many new array methods that allow you to harness the power of functional programming for working with arrays.
However, many developers still reach for familiar loops over leveraging these new methods that can greatly simplify code.
Let’s explore some of the most useful array methods that every Javascript developer should know.
Transforming Arrays with Map()
The map() method allows you to apply a transformation function to each element in an array, returning a new array with the mapped elements.
For example, you can use map() to extract a specific property from an array of objects:
const users = [
{ name: 'John', age: 20 },
{ name: 'Jane', age: 30 },
{ name: 'Jim', age: 40 }
];
const names = users.map(user => user.name);
// ['John', 'Jane'…