What is the reduce method in JavaScript?

What is the reduce method in JavaScript?

The reduce method in JavaScript is used to execute a reducer function on each element of an array, resulting in a single output value.

Can you give me an example of how to use it?

Sure! Here's a simple example:

const numbers = [1, 2, 3, 4];
const sum = numbers.reduce((accumulator, currentValue) => accumulator + currentValue, 0);
console.log(sum); // Output: 10

What does the accumulator represent in this example?

In this example, the accumulator is the total sum that gets updated with each iteration of the array.

Are there any other use cases for reduce?

Yes, reduce can be used for various tasks like flattening arrays, counting occurrences of items, or even transforming data.