combine array of array objects into single array

Question

this is my input

[
  [
    { jobId: 1, requiredNumber: 1, acceptableRate: 80 },
    { jobId: 2, requiredNumber: 2, acceptableRate: 80 },
    { jobId: 3, requiredNumber: 3, acceptableRate: 80 },
    { jobId: 4, requiredNumber: 1, acceptableRate: 80 }
  ],
  [ { jobId: 2, requiredNumber: 1, acceptableRate: 95 } ],
  null
]

I have been trying to combine this array of objects into a single array, i have tried using .reduce() but i wasn't successful and my output was like this

[
  { jobId: 1, requiredNumber: 1, acceptableRate: 80 },        
  { jobId: 2, requiredNumber: 2, acceptableRate: 80 },        
  { jobId: 3, requiredNumber: 3, acceptableRate: 80 },        
  { jobId: 4, requiredNumber: 1, acceptableRate: 80 }
] [ { jobId: 2, requiredNumber: 1, acceptableRate: 95 } ] null

it was still 2 arrays not a single array

my expected output is

[
    { jobId: 1, requiredNumber: 1, acceptableRate: 80 },
    { jobId: 2, requiredNumber: 2, acceptableRate: 80 },
    { jobId: 3, requiredNumber: 3, acceptableRate: 80 },
    { jobId: 4, requiredNumber: 1, acceptableRate: 80 },
    { jobId: 2, requiredNumber: 1, acceptableRate: 95 }
]

Andy · Accepted Answer · 2022-10-08 17:52:21Z

3

Flatten the array, and then filter out the objects.

const data=[[{jobId:1,requiredNumber:1,acceptableRate:80},{jobId:2,requiredNumber:2,acceptableRate:80},{jobId:3,requiredNumber:3,acceptableRate:80},{jobId:4,requiredNumber:1,acceptableRate:80}],[{jobId:2,requiredNumber:1,acceptableRate:95}],null];

const out = data.flat().filter(obj => obj);
console.log(out);

const data=[[{jobId:1,requiredNumber:1,acceptableRate:80},{jobId:2,requiredNumber:2,acceptableRate:80},{jobId:3,requiredNumber:3,acceptableRate:80},{jobId:4,requiredNumber:1,acceptableRate:80}],[{jobId:2,requiredNumber:1,acceptableRate:95}],null];

const out = data.flat().filter(Boolean);
console.log(out);

edited Oct 8, 2022 at 17:52

answered Oct 8, 2022 at 16:44

Andy

63.6k13 gold badges72 silver badges99 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

marsgpl Over a year ago

.filter(Boolean) is prettier than .filter(obj => obj)

Cheng Adrian · Accepted Answer · 2022-10-08 16:45:01Z

0

you should use flat flat function
with a filter to filter out all the null filter function

answered Oct 8, 2022 at 16:45

Cheng Adrian

17710 bronze badges

Comments

Rodrigo Rodrigues · Accepted Answer · 2022-10-08 16:53:12Z

0

It could be even simpler than using flat or reduce. It could be just this (using the ... spread operator):

[
  ...[
    { jobId: 1, requiredNumber: 1, acceptableRate: 80 },
    { jobId: 2, requiredNumber: 2, acceptableRate: 80 },
    { jobId: 3, requiredNumber: 3, acceptableRate: 80 },
    { jobId: 4, requiredNumber: 1, acceptableRate: 80 }
  ],
  ...[ 
    { jobId: 2, requiredNumber: 1, acceptableRate: 95 } 
  ]
]

answered Oct 8, 2022 at 16:53

Rodrigo Rodrigues

8,6321 gold badge32 silver badges43 bronze badges

Collectives™ on Stack Overflow

combine array of array objects into single array

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related