What are the best practices for using the reduce function in JavaScript?

What are the best practices for using the reduce function in JavaScript?

When using the reduce function, it's important to keep your callback function pure and avoid side effects. Also, ensure you provide an initial value to avoid unexpected results.

Can you give me an example of using reduce?

Sure! Here's a simple example:

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

What should I avoid when using reduce?

Avoid using reduce for complex operations that can be broken down into simpler functions. Also, don't use it for side effects, as it can lead to hard-to-maintain code.

How does reduce compare to map and filter?

Reduce is used to accumulate values into a single result, while map transforms each element into a new array, and filter creates a new array with elements that pass a test.