reduce

by Eugene Manager

JavaScript

let orders = [
  { amount : 250 },
  { amount : 400 },
  { amount : 100 },
  { amount : 325 }
]
console.log(orders[0].amount);
console.log(orders);

let totals = orders.reduce(function(sum, order){
  order.amount++;
  console.log('inner', sum, order);
  return sum + order.amount;
}, 0)

console.log(totals);

console.log(orders);