how to sort object in array based on price

Question

if I have something like this:

var lowestPricesCars =
{
  HondaC:
  {
    owner: "",
    price: 45156
  },
  FordNew:
  {
    owner: "",
    price:4100
  },
  HondaOld:
  {
    owner: "",
    price: 45745
  },
  FordOld:
  {
    owner: "",
    price: 34156
  },
}

How can I order the cars based on price ?

Please if the question is not clear then comment it out.

Thanks

lowestPricesCars is an object with cars sorted by the order that they are inserted into lowestPricesCars. Consistent, value based sorting is best done via arrays rather than objects - would you like to see an example of this? — Dacre Denny
– Dacre Denny, Commented Nov 18, 2018 at 19:08
@DacreDenny thanks for the suggestion. But I have built my code already using an object. Changing it to an array will be too much work. Is there a quick way to change it to array and order it and then return back to object ? — samj
– samj, Commented Nov 18, 2018 at 19:12
" to array then back to object" . Still not reliable with regard to order. Will need to change your code instead. — charlietfl
– charlietfl, Commented Nov 18, 2018 at 19:16

MrAleister · Accepted Answer · 2018-11-18 19:15:57Z

1

const arrayOfKeys = Object.keys(lowestPricesCars)
const keysSortedByPrice = arrayOfKeys.sort((a,b) => {
  return lowestPricesCars[a].price - lowestPricesCars[b].price;
});
let carsSortedByPrice = {}
keysSortedByPrice.forEach(key => carsSortedByPrice[key] = lowestPricesCars[key])

If you want to reverse the order:

return lowestPricesCars[b].price - lowestPricesCars[a].price;

answered Nov 18, 2018 at 19:15

MrAleister

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1 Comment

samj Over a year ago

Thanks so much! Works like a charm :D

Akrion · Accepted Answer · 2018-11-18 19:57:21Z

0

You can do this in a concise way via ES6 Object.entries, Array.sort and Array.reduce.

However object's key order is not guaranteed and not consistent between browsers and it is not recommended to be used.

const data = { HondaC: { owner: "", price: 45156 }, FordNew: { owner: "", price:4100 }, HondaOld: { owner: "", price: 45745 }, FordOld: { owner: "", price: 34156 } }

console.log(Object.entries(data)
  .sort((a,b) => a[1].price - b[1].price)  // for DESC b[1].price - a[1].price
  .reduce((r,[k,v]) => (r[k] = v, r), {}))

edited Nov 18, 2018 at 19:57

answered Nov 18, 2018 at 19:45

Akrion

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