Destructing array of objects into one array

Question

I have a result like this.

[ [ { _id: 5e0e46938d6bb7459407ad8b,
      accountId: 58dc5b9f3107602dbaba1281,
      buildingId: 5d254bb179584ebcbb68b712,
      gatewayId: 5d254b64ba574040d9632ada,
      deviceId: 5d25f9d2dc4aea7838b0aaa1,
      movementIndex: 2.437685743915776,
      fallStatus: 6,
      breathingRate: 21,
      breathingStatus: 1,
      presenceStatus: 1,
      heartRate: 88,
      heartRateStatus: 1,
      noMovementPeriod: 3,
      __v: 0,
      createdAt: 2020-01-02T19:37:55.423Z,
      updatedAt: 2020-01-02T19:37:55.423Z } ],
  [ { _id: 5e0e46678d6bb7459407ad76,
      accountId: 58dc5b9f3107602dbaba1281,
      buildingId: 5d254bb179584ebcbb68b712,
      gatewayId: 5d254b64ba574040d9632ada,
      deviceId: 5d25f9d2dc4aea7838b0aaa2,
      movementIndex: 2.079566889716151,
      fallStatus: 1,
      breathingRate: 18,
      breathingStatus: -1,
      presenceStatus: 0,
      heartRate: 92,
      heartRateStatus: -1,
      noMovementPeriod: 2,
      __v: 0,
      createdAt: 2020-01-02T19:37:11.972Z,
      updatedAt: 2020-01-02T19:37:11.972Z } ],

   ]

As you can see they are separate objects. I want them to be in one single object as elements so I can have only one array of object.

Expected result -

[ { _id: 5e0e46938d6bb7459407ad8b,
    accountId: 58dc5b9f3107602dbaba1281,
    buildingId: 5d254bb179584ebcbb68b712,
    gatewayId: 5d254b64ba574040d9632ada,
    deviceId: 5d25f9d2dc4aea7838b0aaa1,
    movementIndex: 2.437685743915776,
    fallStatus: 6,
    breathingRate: 21,
    breathingStatus: 1,
    presenceStatus: 1,
    heartRate: 88,
    heartRateStatus: 1,
    noMovementPeriod: 3,
    __v: 0,
    createdAt: 2020-01-02T19:37:55.423Z,
    updatedAt: 2020-01-02T19:37:55.423Z },
 { _id: 5e0e46678d6bb7459407ad76,
    accountId: 58dc5b9f3107602dbaba1281,
    buildingId: 5d254bb179584ebcbb68b712,
    gatewayId: 5d254b64ba574040d9632ada,
    deviceId: 5d25f9d2dc4aea7838b0aaa2,
    movementIndex: 2.079566889716151,
    fallStatus: 1,
    breathingRate: 18,
    breathingStatus: -1,
    presenceStatus: 0,
    heartRate: 92,
    heartRateStatus: -1,
    noMovementPeriod: 2,
    __v: 0,
    createdAt: 2020-01-02T19:37:11.972Z,
    updatedAt: 2020-01-02T19:37:11.972Z } ]

I am trying to figure out a lodash but not getting any result. Your help is very much appreciated. Thanks.

Is your first snippet two different variables? Or is that one long string? Because that's invalid JSON — Taplar
– Taplar, Commented Jan 2, 2020 at 20:00
Ah, so you have an array of arrays with an object in them. You're looking for a flatten in lodash if they have it. lodash.com/docs/2.4.2#flatten — Taplar
– Taplar, Commented Jan 2, 2020 at 20:04

Shiny · Accepted Answer · 2020-01-02 20:11:27Z

You can just use .flat() and it will work fine for you, no need to loop

const data = [[{_id:"5e0 e46938d6bb7459407ad8b",accountId:"58 dc5b9f3107602dbaba1281",buildingId:"5 d254bb179584ebcbb68b712",gatewayId:"5 d254b64ba574040d9632ada",deviceId:"5 d25f9d2dc4aea7838b0aaa1",movementIndex:2.437685743915776,fallStatus:6,breathingRate:21,breathingStatus:1,presenceStatus:1,heartRate:88,heartRateStatus:1,noMovementPeriod:3,__v:0,createdAt:"2020 - 01 - 02 T19: 37: 55.423 Z",updatedAt:"2020 - 01 - 02 T19: 37: 55.423 Z"}],[{_id:"5e0 e46678d6bb7459407ad76",accountId:"58 dc5b9f3107602dbaba1281",buildingId:"5 d254bb179584ebcbb68b712",gatewayId:"5 d254b64ba574040d9632ada",deviceId:"5 d25f9d2dc4aea7838b0aaa2",movementIndex:2.079566889716151,fallStatus:1,breathingRate:18,breathingStatus:-1,presenceStatus:0,heartRate:92,heartRateStatus:-1,noMovementPeriod:2,__v:0,createdAt:"2020 - 01 - 02 T19: 37: 11.972 Z",updatedAt:"2020 - 01 - 02 T19: 37: 11.972 Z"}]];
const newData = data.flat();

console.log(newData);

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

jered · Accepted Answer · 2020-01-02 20:04:25Z

2

Your original post is a bit unclear, but I think you have an array, inside of which are subarrays with a single object in them each? Sort of like this?

var foo = [
    [ { bar: "baz" } ],
    [ { bar: "qux" } ]
];

There is no syntactic sugar ("destructuring" shorthand) you can do to flatten that, that I know of. But it's quite simple with Array.map():

var baz = foo.map(ea => ea[0]);
// baz = [ { bar: "baz" }, { bar: "qux"} ]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

answered Jan 2, 2020 at 20:04

jered

11.6k2 gold badges26 silver badges34 bronze badges

1 Comment

newdeveloper Over a year ago

this is perfect. Thanks a lot

Dominik Matis · Accepted Answer · 2020-01-02 20:09:07Z

-1

This is the solution using destructuring

const arr1 = [[{......}], [{......}]]

const result = [...arr1[0], ...arr1[1]]

edited Jan 2, 2020 at 20:09

answered Jan 2, 2020 at 20:00

Dominik Matis

2,15612 silver badges15 bronze badges

1 Comment

Morta1 Over a year ago

It's an array of arrays

Collectives™ on Stack Overflow

Destructing array of objects into one array

3 Answers 3

Comments

1 Comment

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

1 Comment

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related