Convert multiple objects in array into an array

Question

I want to convert this:

var x = [{ order_id: 10,
           product_id: 5,
           product_after_price: 50 },
         { order_id: 10,
           product_id: 6,
           product_after_price: 50 }]

Into this:

[[10, 5, 50], [10, 6, 50]]

I tried .map() function but it just doesn't work. Any help would be appreciated, thank you!

Ordering of keys in the object is not guaranteed, not sure if you will get a straightfoward answer. — gurvinder372, Jan 19 '18 at 10:49
@gurvinder372 Ya this worked, thanks. I don't get why people directly attack me with "-1"s, I'm a beginner and I'm here to learn stuff. Smh. — Cedric Hadjian, Jan 19 '18 at 10:53

score 1 · Answer 1 · answered Jan 19 '18 at 10:55

If you want to ensure the order of the values in the array across different JS engines, you can create an array of property keys (order), and iterate it to get the values in the requested order.

const order = ['order_id', 'product_id', 'product_after_price'];

const x = [{"order_id":10,"product_id":5,"product_after_price":50},{"order_id":10,"product_id":6,"product_after_price":50}];
           
const result = x.map((o) => order.map((key) => o[key]));

console.log(result);

score 0 · Answer 2 · answered Jan 19 '18 at 10:54

It is really the very simple question, it is my kind advice that you should refer javascript core functions first before post a question here.

var x = [{ order_id: 10,
           product_id: 5,
           product_after_price: 50 },
         { order_id: 10,
           product_id: 6,
           product_after_price: 50 }]
        
var arrValues = []
for(var index=0; index< x.length; index++){
 if(!!x[index]){
   arrValues.push(Object.values(x[index]));
  }
}
console.log(arrValues);

score 0 · Accepted Answer · answered Jan 19 '18 at 10:57

Without considering order, simply use map

arr.map( s => Object.values(s) )

But you need to specify the order first

var order = ["order_id", "product_id", "product_after_price"];

then use map

var output = arr.map( function(item){
   return order.reduce( function(a,c){
      a.push( item[c] );
     return a;
   }, []);
})

Demo

var order = ["order_id", "product_id", "product_after_price"];
var x = [{
    order_id: 10,
    product_id: 5,
    product_after_price: 50
  },
  {
    order_id: 10,
    product_id: 6,
    product_after_price: 50
  }
];
var output = x.map(function(item) {
  return order.reduce(function(a, c) {
    a.push( item[c] );
    return a;
  }, []);
});

console.log(output);

Convert multiple objects in array into an array

3 Answers3