Question

Delving into arrays today with javascript. I have created two arrays

    var items = ['Bread', 'Milk', 'Butter']
    var calories = [10,20,30]

The idea is that the calories correspond to the item, so bread has 10 calories. And if I want to see the two arrays combining results then i call this

   document.writeln(items[1] +  calories[1])

I’m guessing theres a much more efficient way of doing this, but as a newbie I would appreciate any pointers in the right direction. Ideally I want to store all the info in one array

Answer 1

One way would be to use an object instead of an array:

var items = {
   Bread: 10, 
   Milk: 20, 
   Butter: 30
};

alert(items["Bread"]); // Alert 10

There is a good article on MDN about working with objects in JavaScript that might be useful to you.