array thing

index.js

// Say you have an array of "items" that you want to iterate over...
const someArray = [
  {
    name: 'A',
    number: 1
  },
  {
    name: 'B',
    number: 2
  },
  {
    name: 'C',
    number: 3
  }
];

// It doesn't matter that the objects have identical properties...in fact, they should!
for (let i = 0; i < someArray.length; i++) {
  console.log(`Name is ${someArray[i].name} and number is ${someArray[i].number}`);
}

// You can do even better with an ES6 class:
class Item {
  constructor(name, number) {
    this.name = name;
    this.number = number;
  }
}

// ...this way, you have a consistent structure that you can easily use when adding new data :)
const anotherArray = [
  new Item('A', 1),
  new Item('B', 2),
  new Item('C', 3)
];

// try it both ways, iterate over with the for loop above....the results will be identical