Converting an object in an array of objects into an array, while preserving other data

Question

I have the following array of objects:

const datasubject = 
[
 0: {
    level: "standard 3"
    subject: "English"
    _id: xxx
    coreCompetencies {
       0gHq0U5E667L4EdGbdZ2h: "Grammar",
       9CfalSpzKYIV7AaWKBUwg: "Listening",
       9boIfWUEGdj3WGxJL12XB: "Reading",
       QZ11uYQ8CXkRk0LWenjqj: "Writing",
       ZG1gtxRg6quIOYaTr6CUy: "Speaking"
    }
 },
 1: {...},
 2: {...}
]

I would like to change the coreCompetencies into an array of values e.g. ["Grammar", "Listening", "Reading", "Writing", "Speaking"] while preserving the other data. I've tried .map but got confused as it only returns the coreCompetencies object, without the other details. This is what I did that returned only the coreCompetencies object:

const datacore = datasubject.map(value => value.coreCompetencies);

I would like to achieve something like this:

const datasubject = 
[
 0: {
    level: "standard 3"
    subject: "English"
    _id: xxx
    coreCompetencies ["Grammar","Listening","Reading","Writing","Speaking"]
 },
 1: {...},
 2: {...}
]

tam.dangc · Accepted Answer · 2019-03-07 02:41:08Z

4

const datacore = datasubject.map(({coreCompetencies, ...rest})=> {
  return {...rest, coreCompetencies: Object.values(coreCompetencies)}
})

answered Mar 7, 2019 at 2:41

tam.dangc

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2 Comments

Hafiz Hanif Over a year ago

Thank you very much @tam-dc! This works, and I'm using your solution because I can see where the 'rest' are.

binariedMe Over a year ago

A better implementation :)

binariedMe · Accepted Answer · 2019-03-07 02:38:35Z

2

You should do something like this :

const datacore = datasubject.map(value => {
  value.coreCompetencies = Object.values(value.coreCompetencies);
  return value;
})

answered Mar 7, 2019 at 2:38

binariedMe

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1 Comment

Hafiz Hanif Over a year ago

Thanks @binariedme ! i've also tried your solution and it works! Super awesome!

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