combine array of array objects into single array-CodePudding

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 }
]

CodePudding user response：

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);

CodePudding user response：

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

CodePudding user response：

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 } 
  ]
]