What are some common JavaScript methods?

What are some common JavaScript methods I should know?

Some common JavaScript methods include .map(), .filter(), .reduce(), .forEach(), and .find(). Would you like to know more about any specific method?

Can you explain how the .map() method works?

.map() creates a new array by applying a function to each element of the original array. For example, you can use it to double the values in an array.

Can you show me a code example of using .map()?

Sure! Here's a simple example:

const numbers = [1, 2, 3, 4];
const doubled = numbers.map(num => num * 2);
console.log(doubled); // Output: [2, 4, 6, 8]

What about the .filter() method?

.filter() creates a new array with all elements that pass the test implemented by the provided function. For example, you can use it to get all even numbers from an array.