How to convert an array object to an array of arrays?

Question

I have an array object now. The function should return an array of arrays of all object values. Where is the mistake?

const car = [
  {  
    "name":"BMW",
    "price":"55 000",
    "country":"Germany",
    "security":"Hight"
  },
  {  
    "name":"Mitsubishi",
    "price":"93 000", 
    "constructor":"Bar John",
    "door":"3",
    "country":"Japan",
  },
  {  
    "name":"Mercedes-benz",
    "price":"63 000", 
    "country":"Germany",
    "security":"Hight"
  }
 ];

function cars(car){
  return car.map(function(key) {
    return [[key]];
  });
}
console.log(cars(car));

key references each object in your array, so you go from this: [{}, {}, ...] to this [[[{}]], [[{}]], ...]. Show the structure you want. — Adrian Lynch
– Adrian Lynch, Commented Apr 21, 2019 at 11:31
Possible duplicate of How to convert an Object {} to an Array [] of key-value pairs in JavaScript — 1565986223
– 1565986223, Commented Apr 21, 2019 at 11:31

Nina Scholz · Accepted Answer · 2019-04-21 11:39:28Z

3

You could return the values of the object.

function cars(car){
    return car.map(Object.values);
}

const car = [{ name: "BMW", price: "55 000", country: "Germany", security: "Hight" }, { name: "Mitsubishi", price: "93 000", constructor: "Bar John", door: "3", country: "Japan" }, { name: "Mercedes-benz", price: "63 000", country: "Germany", security: "Hight" }];

console.log(cars(car));

.as-console-wrapper { max-height: 100% !important; top: 0; }

edited Apr 21, 2019 at 11:39

answered Apr 21, 2019 at 11:33

Nina Scholz

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Comments

Amardeep Bhowmick · Accepted Answer · 2019-04-21 11:34:25Z

0

You are wrapping the individual array object in another array so it becomes [[{object}]], simply map to a new array of Object.values of the inner objects.

const car = [
  {  
    "name":"BMW",
    "price":"55 000",
    "country":"Germany",
    "security":"Hight"
  },
  {  
    "name":"Mitsubishi",
    "price":"93 000", 
    "constructor":"Bar John",
    "door":"3",
    "country":"Japan",
  },
  {  
    "name":"Mercedes-benz",
    "price":"63 000", 
    "country":"Germany",
    "security":"Hight"
  }
 ];

function cars(car){
  return Array.from(car, Object.values)
}
console.log(cars(car));

answered Apr 21, 2019 at 11:34

Amardeep Bhowmick

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Comments

Junius L · Accepted Answer · 2019-04-21 11:35:28Z

0

Change [[key]] to [key]

const car = [
  {  
    "name":"BMW",
    "price":"55 000",
    "country":"Germany",
    "security":"Hight"
  },
  {  
    "name":"Mitsubishi",
    "price":"93 000", 
    "constructor":"Bar John",
    "door":"3",
    "country":"Japan",
  },
  {  
    "name":"Mercedes-benz",
    "price":"63 000", 
    "country":"Germany",
    "security":"Hight"
  }
 ];

function cars(car){
  return car.map(function(key) {
    return [key];
  });
}
console.log(cars(car));

answered Apr 21, 2019 at 11:35

Junius L

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