Need to convert JSON format to another json format using JavaScript

Question

Need to convert below request format by using javascript to output format.

Request:

{
  "patientId": "1234",
  "patientName": "Sai",
  "patientFname": "Kumar",
  "patientLname": "Gadi",
  "city": "",
  "zipcode":null,
  "state":" "

}

Need to convert as below format but we need to check object keyvalue of the element should not be null or " "(no space) or ""(not empty) then only we need to print the object name and its values as below format:

Output:

[
 {
  "propertyName": "patientId",
  "propertyValue": "1234"
 },
 {
   "propertyName": "patientName",
   "propertyValue": "Sai"
 },
 {
  "propertyName": "patientFname",
  "propertyValue": "Kumar"
  },
  {
   "propertyName": "patientLname",
    "propertyValue": "Gadi"
   }
]

Thanks in advance.

Jack Bashford · Accepted Answer · 2019-03-30 06:14:06Z

3

Use map and filter on Object.entries:

const data = {
  "patientId": "1234",
  "patientName": "Sai",
  "patientFname": "Kumar",
  "patientLname": "Gadi",
  "city": "",
  "zipcode": null,
  "state": " "
};

const newData = Object.entries(data).filter(([, v]) => ![undefined, null, ""].includes(typeof v == "string" ? v.trim() : v)).map(([key, value]) => ({
  propertyName: key, 
  propertyValue: value
}));

console.log(newData);

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

edited Mar 30, 2019 at 6:14

answered Mar 30, 2019 at 6:01

Jack Bashford

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6 Comments

Mark Over a year ago

This is nice. It's probably not an issue in this case, but might be in others — this will filter out the number 0.

Jack Bashford Over a year ago

Whoops @MarkMeyer - I will fix that straight away.

Jack Bashford Over a year ago

@MarkMeyer I have fixed that issue, any better?

Jack Bashford Over a year ago

Oh yes @Shidersz that would be easier - I will do that.

Mark Over a year ago

Yeah, looks good to me. Not sure why someone filter the need to downvote.

|

wentjun · Accepted Answer · 2019-03-30 06:02:34Z

0

Here is one simle way to do it:

const obj = {
  "patientId": "1234",
  "patientName": "Sai",
  "patientFname": "Kumar",
  "patientLname": "Gadi",
  "city": "",
  "zipcode":null,
  "state":" "
};
const newArr = [];

for (let key in obj) {
  if (obj[key] && obj[key].trim()) {
    newArr.push({
      propertyName: key,
      propertyValue: obj[key]
    });
  }
}

console.log(newArr);

First, you iterate through the enumerable properties of the object. Within each iteration, you check if the value is not null or empty spaces. If there is a proper value, it will push the new object to the resulting array.

answered Mar 30, 2019 at 6:02

wentjun

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3 Comments

Rakesh A R Over a year ago

Hi, Thanks a lot for the solution.But the if condition is not getting executed when we are sending "state":" "(with space).

wentjun Over a year ago

Hey, just to get you right, am I supposed to return the object into the array if there are only spaces?

wentjun Over a year ago

That is because obj[key].trim() removes spaces from state: '" ", cauing it to be state: "". Therefore, that if condition will check for that too.

Miroslav Glamuzina · Accepted Answer · 2019-03-30 06:37:52Z

0

Array.reduce would be appropriate here. This way you do not have to call Array functions consecutively, just to loop through your array multiple times (ie: Array.map()+Array.filter()).

let obj = {
  "patientId": "1234",
  "patientName": "Sai",
  "patientFname": "Kumar",
  "patientLname": "Gadi",
  "city": "",
  "zipcode": null,
  "state": " "
};

let res = Object.entries(obj).reduce((acc, [key, value]) => {
  if (![undefined, null, ''].includes(typeof value === 'string' ? value.trim() : '')) {
    acc.push({
      propertyName: key,
      propertyValue: value
    });
  }
  return acc;
}, []);

console.log(res);

edited Mar 30, 2019 at 6:37

answered Mar 30, 2019 at 6:30

Miroslav Glamuzina

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Comments

Code Maniac · Accepted Answer · 2019-03-30 06:03:40Z

-2

You can use Object.entries and reduce

let obj = {
  "patientId": "1234",
  "patientName": "Sai",
  "patientFname": "Kumar",
  "patientLname": "Gadi",
  "city": "",
  "zipcode":null,
  "state":" "
}

let op = Object.entries(obj).reduce((op,[key,value])=>{
  if((value||'').trim()){
    op.push({
    'propertyName' : key,
    'propertyValue': value
   })
  }
  return op
},[])

console.log(op)

answered Mar 30, 2019 at 6:03

Code Maniac

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