How to modify JSON key name within an array in NodeJs

Question

I have a function within NodeJS which is returning an array of JSON elements

let rows = function1();

Here rows look like:

"rows": [
    {
    "Hostname": "abc123",
    "name": "name1",
    "Status": "PASS",
    "Heading": "Not Applicable"
    },
    {
    "Hostname": "abc123",
    "name": "name2",
    "Status": "FAIL",
    "Heading": "Not Applicable"
    }
]

Here, rows can have any number of Json elements:

"rows": [
    {
    "Hostname": "abc123",
    "name": "name1",
    "Status": "PASS",
    "Heading": "Not Applicable"
    },
    {
    "Hostname": "abc123",
    "name": "name2",
    "Status": "FAIL",
    "Heading": "Not Applicable"
    },
    {
    "Hostname": "abc123",
    "name": "name3",
    "Status": "FAIL",
    "Heading": "Not Applicable"
    },
 ...
]

In all JSON elements Hostname will remain name,

I want to modify the rows array such that it looks as below:

"rows": [
    {
    "Hostname": "abc123",
    "name1Status": "PASS",
    "name1Heading": "Not Applicable"
    "name2Status": "FAIL",
    "name2Heading": "Not Applicable"
    "name3Status": "FAIL",
    "name3Heading": "Not Applicable"
     ...
]

Ivan S · Accepted Answer · 2020-04-27 04:28:24Z

1

If you understand correctly, then you need to achieve this result. Use reduce for this, very convenient for working with arrays

const rows = [
    {
    "Hostname": "abc123",
    "name": "name1",
    "Status": "PASS",
    "Heading": "Not Applicable"
    },
    {
    "Hostname": "abc123",
    "name": "name2",
    "Status": "FAIL",
    "Heading": "Not Applicable"
    }
]
const res = rows.reduce((acc, rec) => {
	let result = { ...acc, [`Hostname`]: rec.Hostname,  [`${rec.name}Status`]: rec.Status, [`${rec.name}Heading`]: rec.Heading  }
	return result
}, [])
console.log(res)

edited Apr 27, 2020 at 4:28

answered Apr 27, 2020 at 4:21

Ivan S

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2 Comments

meallhour Over a year ago

Here, the output is not showing "Hostname": "abc123". Instead it is showing "abc123": "abc123"

Ivan S Over a year ago

Yes, sry. try now

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