What are some examples of the reduce method in JavaScript?

Can you explain the reduce method in JavaScript with examples?

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

The accumulator is the accumulated value previously returned in the last invocation of the callback, or the initial value if supplied. It helps in building up the final result.

Can you give me another example using an array of objects?

Absolutely! Here's an example that calculates the total price of items in an array of objects:

const items = [
  { name: 'apple', price: 1 },
  { name: 'banana', price: 2 },
  { name: 'orange', price: 3 }
];
const totalPrice = items.reduce((acc, item) => acc + item.price, 0);
console.log(totalPrice); // Output: 6