Question 190655 in Javascript Question posted in
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Javascript – Add an index in an object in order to loop

Problem : I am getting a JSON file i am converting that to an object and looping it in for loop.
But in case of single data i am getting the below:
Eg 1 : Single Data
 {     "Id": 2140,     “EmpId” : 4732,     “Flag”: "No"   }

Eg 2 : For Multiple Data i am getting the below:
{ "0":  {     "Id": 2140,     “EmpId” : 4732,     “Flag”: "No"   }, "1":  {     "Id": 2141,     “EmpId” : 4712,     “Flag”: “Yes”   } }

When i try to loop that in for loop i get it as undefined for single data ie for Eg 1, for multiple data ie Eg 2 it works fine.

 const a = Object.values(data).length;
    console.log(a);
    for (let i = 0; i < a; i++) {
      const res = data[i];
}

Using below code to convert it into JSON

const data = JSON.parse(message.messageText);

How can i handle it in this for loop or how can i make the single data into the below format

{ "0":  {     "Id": 2140,     “EmpId” : 4732,     “Flag”: "No"   }}

so that it reads the 0 and loops

even tried using object.entries but it reads the id as one and empid as second and so on.

Any help is much appreciated.

Thank You

I tried

const a = object.entries(data)

But it reads the id as one and empid as second and so on.

Tags:

3

Answers


  1. 0

    You can just check whether 0 key exists in the data that you’re receiving. If it exists, that means, you can do your normal loop.

    Otherwise, you can add a 0 key, and the value will be what you receive in the input.

    function read(data){
  if(data?.[0]){
     const a = Object.values(data).length;    
     for (let i = 0; i < a; i++) {
       const res = data[i]
     }
  } else{
    const tempData = {}
    tempData[0] = data
    console.log(tempData)
  }
}
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  2. 0

    Change

    const data = JSON.parse(message.messageText);`

    to this:

    const parsed = JSON.parse(message.messageText);
const data = parsed[0] ? parsed : { 0: parsed };

    With this, you check whether if the item 0 exists in the parsed data and just create it if not.

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  3. 0 
    let data={ "0":  {     "Id": 2140,     "EmpId" : 4732,     "Flag": "No"   }, "1":  {     "Id": 2141,     "EmpId" : 4712,     "Flag": "Yes"   } }

const a = Object.values(data).length;
console.log(a);

Object.keys(data).forEach((k, i) => { 
   console.log(i, data[k]);
});
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