Trouble accessing object within an object (for a for loop)

Question

Essentially, I am trying to create a for loop which creates an object containing each candy's name and price. I can access the inventory for a certain day with no problems using this

console.log(store3[4]['inventory sold'])

{ 'Dark Chocolate Crunchies': { cost: 4.29, quantity: 2 },
  'Mint Wafers': { cost: 1.09, quantity: 1 },
  'Peppermint Poppers': { cost: 2.38, quantity: 0 },
  'Peanut Butter Buttered Peanuts': { cost: 1.79, quantity: 2 },
  'Berry Bites': { cost: 7.89, quantity: 5 },
  'Caramel Twists': { cost: 0.5, quantity: 7 },
  'Banana Bunches': { cost: 4.53, quantity: 2 } }

As well as this

console.log(store3[4]['inventory sold']['Mint Wafers'])

{ cost: 1.09, quantity: 1 }

However, for a for loop, I need to use numerical values, and for some reason I get undefined when I try to run the prior command in this format. Any suggestions?

console.log(store3[4]['inventory sold'][1])

undefined

Pierre Granger · Accepted Answer · 2017-07-23 17:06:51Z

2

You can use Object.keys to get an array of keys only, then you forEach on this array and you will be abled to access every attribute of your objects.

var datas = { 
  'Dark Chocolate Crunchies': { cost: 4.29, quantity: 2 },
  'Mint Wafers': { cost: 1.09, quantity: 1 },
  'Peppermint Poppers': { cost: 2.38, quantity: 0 },
  'Peanut Butter Buttered Peanuts': { cost: 1.79, quantity: 2 },
  'Berry Bites': { cost: 7.89, quantity: 5 },
  'Caramel Twists': { cost: 0.5, quantity: 7 },
  'Banana Bunches': { cost: 4.53, quantity: 2 }
}


Object.keys(datas).forEach(function (key) {
  console.log(key) ;
  console.log('cost',datas[key]['cost']) ;
  console.log('quantity',datas[key]['quantity']) ;
}) ;

answered Jul 23, 2017 at 17:06

Pierre Granger

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1 Comment

Jameseypoo Over a year ago

Thank you! This is extremely helpful

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