Can you give me real-world examples of JavaScript array methods?

Can you give me real-world examples of JavaScript array methods?

Sure! JavaScript array methods like map, filter, and reduce are commonly used. For instance, map can transform an array of numbers into their squares.

Can you explain how the filter method works with an example?

Absolutely! The filter method creates a new array with all elements that pass the test implemented by the provided function. For example, if you have an array of numbers and want to keep only the even ones, you could do:

const numbers = [1, 2, 3, 4, 5, 6];
const evens = numbers.filter(num => num % 2 === 0);
// evens will be [2, 4, 6]

What about the reduce method? How is it used?

The reduce method executes a reducer function on each element of the array, resulting in a single output value. For example, to sum an array of numbers:

const numbers = [1, 2, 3, 4];
const sum = numbers.reduce((accumulator, current) => accumulator + current, 0);
// sum will be 10