Summarize an array of objects

The challenge

Write report(items) that takes items like { name: "rice", price: 40, qty: 2 } and returns { count, total, priciest }: how many items there are, the total cost (price × qty), and the name of the item with the highest price.

Try it

Write your answer below, then press Check my answer. Your code runs right here in your browser, and the tests tell you what works.

What the tests check

• report([{ name: "rice", price: 40, qty: 2 }, { name: "fish", price: 60, qty: 1 }, { name: "salt", price: 2, qty: 3 }]) gives { count: 3, total: 146, priciest: "fish" }
• report([{ name: "pen", price: 2, qty: 5 }]) gives { count: 1, total: 10, priciest: "pen" }

Hints

Stuck? Open one hint at a time. Try again after each one.

A solution

There’s always more than one right way. Read it, make sure you understand it, then try writing it yourself without looking.

function report(items) {
  let total = 0;
  let priciest = items[0];
  for (const item of items) {
    total += item.price * item.qty;
    if (item.price > priciest.price) priciest = item;
  }
  return { count: items.length, total, priciest: priciest.name };
}

Learn what you need

This exercise uses what Grade 8: Objects: Describing Things With Labels teaches. Read those notes first if any of it is new.