Trying to iterate array of objects using es6 as it is very new for me

here is my array of objects

[j]
0: j
$extCollectionIndex: 0
data: {ID: "b7f7ce8b-1455-41b3-ac26-b54916f6718f", userId: "444441", userName: "cjtest.1", email: "[email protected]",  …}

need to return or console username

I just tried(map and find )

let obj = records.map(obj => {return obj.data});

console.log(obj)//[object,object]

can any one help me on this

Trying to iterate array of objects using es6 as it is very new for me

here is my array of objects

[j]
0: j
$extCollectionIndex: 0
data: {ID: "b7f7ce8b-1455-41b3-ac26-b54916f6718f", userId: "444441", userName: "cjtest.1", email: "[email protected]",  …}

need to return or console username

I just tried(map and find )

let obj = records.map(obj => {return obj.data});

console.log(obj)//[object,object]

can any one help me on this

• javascript
• ecmascript-6

Share Improve this question Follow edited Jan 4, 2019 at 14:02 Kon 4,09944 gold badges2525 silver badges3838 bronze badges asked Jan 4, 2019 at 14:00 R9102R9102 72711 gold badge1111 silver badges3535 bronze badges 6

• can you post the whole array? – Harish Soni Commented Jan 4, 2019 at 14:02
• ...obj.data.userName – gaetanoM Commented Jan 4, 2019 at 14:03
• What's wrong with map ? – Weedoze Commented Jan 4, 2019 at 14:03
• Your question is pretty vague, but I'd assume you need something like for (let object of records) { console.log(object.data.username); } – Bertijn Pauwels Commented Jan 4, 2019 at 14:03
• 3 records.map(obj => obj.data.username); – Weedoze Commented Jan 4, 2019 at 14:04

 |  Show 1 more ment

3 Answers 3

Sorted by: Reset to default 3

Array.prototype.map will return a new array. If you return obj.data you will have an array of objects. You need to be more specific about the data you need.

let obj = records.map(obj => obj.data.userName );

Just use your map function over record.data.userName and not just record.data, you can then print it out using join. Or use a forEach loop with a console.log inside.

Working example :

function foo(){
  const records = [
      {
          "data": {
              "ID": "b7f7ce8b-1455-41b3-ac26-b54916f6718f",
              "userId": "444441",
              "userName": "cjtest.1",
              "email": "[email protected]"
          }
      },
      {
          "data": {
              "ID": "b7f7ce8b-1455-41b3-ac26-b54916f6718f",
              "userId": "444441",
              "userName": "srtkjrthrt",
              "email": "[email protected]"
          }
      },
      {
          "data": {
              "ID": "b7f7ce8b-1455-41b3-ac26-b54916f6718f",
              "userId": "444441",
              "userName": "srthstrj",
              "email": "[email protected]"
          }
      },
      {
          "data": {
              "ID": "b7f7ce8b-1455-41b3-ac26-b54916f6718f",
              "userId": "444441",
              "userName": "cjghj1",
              "email": "[email protected]"
          }
      }
  ]
  const userList = records.map(record => record.data.userName)
  console.log(userList.join(', '))
}

foo()

Here is the output

let obj = records.map(obj => {return obj.data.username});

console.log(obj)//cjtest.1

Thanks you @Weedoze @gaetanoM