CODEWITHSUNDEEP
javascriptarraysobjectecmascript-6
retro
retro

Reputation: 51

Create nested Object from an Array

I have the following array of objects

const sorted = [
{
IsoCode: "EUR",
Buy: 1.948,
Sell: 1.963
},
{
IsoCode: "GBP",
Buy: 2.1184,
Sell: 2.1894
},
{
IsoCode: "USD",
Buy: 1.5781,
Sell: 1.6484
},
]

and I want to create an Object looking like this

    {
            USD: 
            {
              buy:1.5781,
              sell:1.6484,
    
            },
            EUR:
            {
              buy:1.948,
              sell:1.963,
            },
            GBP: 
            {
              buy:2.1184,
              sell:2.1894,
            }
          }

Currently I'am assigning the values manually, but I don't think this is scalable. I'm looking for more effective approach.

Upvotes: 0

Views: 57

Answers (2)

trincot
trincot

Reputation: 350137

I would go for Object.fromEntries and the object rest syntax:

const sorted = [{IsoCode: "EUR",Buy: 1.948,Sell: 1.963},{IsoCode: "GBP",Buy: 2.1184,Sell: 2.1894},{IsoCode: "USD",Buy: 1.5781,Sell: 1.6484},];

let res = Object.fromEntries(sorted.map(({IsoCode, ...rest}) => [IsoCode, rest]));

console.log(res);

Upvotes: 3

Guerric P
Guerric P

Reputation: 31805

You could use Array.prototype.reduce() like this:

const sorted = [{
    IsoCode: "EUR",
    Buy: 1.948,
    Sell: 1.963
  }, {
    IsoCode: "GBP",
    Buy: 2.1184,
    Sell: 2.1894
  }, {
    IsoCode: "USD",
    Buy: 1.5781,
    Sell: 1.6484
  },
]

const obj = sorted.reduce(
  (acc, { IsoCode, Buy, Sell }) => 
    (acc[IsoCode] = { Buy, Sell }) && acc,
  {}
);

console.log(obj);

Upvotes: 2

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