What is array reduce in JavaScript?

Can you explain what array reduce does in JavaScript?

Sure! The reduce method executes a reducer function on each element of the array, resulting in a single output value.

How does the reducer function work?

The reducer function takes two parameters: an accumulator and the current value. It processes each element and returns the updated accumulator.

Can you give me an example of using array reduce?

Absolutely! For instance, you can sum all numbers in an array like this: const sum = arr.reduce((acc, curr) => acc + curr, 0);.

What are some common use cases for array reduce?

Common use cases include summing values, flattening arrays, counting occurrences, and transforming data.