Get specific keys in multiple object in Array Node JS

Question

I have an example code below :

z = [] //To get all the Id    
x = [
        {
           _id: "12345",
           name: "A"      
        },
        {
           _id: "67890",
           name: "B"
        }
    ]

The question is how I can get all the "_id" from "x" and save it to "z". So the results like this:

z = ["12345", "67890"]

Any answer would be appreciated

Sajeetharan · Accepted Answer · 2018-01-24 01:59:33Z

1

Use array.map

var  x = [
        {
           "_id": "12345",
           "name": "A"      
        },
        {
           "_id": "67890",
           "name": "B"
        }
    ];
var result = x.map(a => a._id);
console.log(result);

edited Jan 24, 2018 at 1:59

answered Jan 24, 2018 at 1:54

Sajeetharan

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Comments

charlietfl · Accepted Answer · 2018-01-24 01:53:38Z

1

This is a very simple Array#map()

   
const x = [{
    _id: "12345",
    name: "A"
  },
  {
    _id: "67890",
    name: "B"
  }
]

const z = x.map(o => o._id);

console.log(z)

answered Jan 24, 2018 at 1:53

charlietfl

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