Capstone: shopping cart total

Everything so far comes together here: an array of objects, a function that processes them, and a second function built on the first. This is what most real application code looks like - not a single trick, but small pieces composed together.

array.reduce((acc, item) => ..., start) walks the array once, carrying an accumulator (acc) forward and updating it on each item - perfect for turning a list into a single total. Once you have that total, the rest is a plain comparison.

Your task: using the sample cart array already in the editor, write cartTotal(items), returning the sum of price * qty across all items, and isBigOrder(items), returning true when cartTotal(items) is 100 or more.

You'll practice:

Reducing an array to a single value
Building one function on top of another

const cart = [
  { name: "Mouse", price: 20, qty: 2 },
  { name: "Keyboard", price: 45, qty: 1 },
];

// Write cartTotal(items): sum of price * qty for every item.
function cartTotal(items) {

}

// Write isBigOrder(items): true if cartTotal(items) >= 100.
function isBigOrder(items) {

}