How to replace the keys "names" in javascript

Question

Below is the object

{
  'File_12345.ZLM': {    
    MeterID_12345: {     
      BASIC_INFO: [Object]

    }
  }
}
{
  'File_678910.ZLM': {
    MeterID_678910: {
      BASIC_INFO: [Object],
    }
  }
}

===============================================================================================
I want File_12345.ZLM and File_678910.ZLM replaced with key name as "FileName" and MeterID_12345 and MeterID_678910 replaced with "MeterId"

So Expected Output would be as below

{
  'FileName': {    
    MeterId: {     
      BASIC_INFO: [Object]

    }
  }
}
{
  'FileName': {
    MeterId: {
      BASIC_INFO: [Object],
    }
  }
}

No in output keys are changed, i have shown how the expected output should be — Aksheet-Goku
– Aksheet-Goku, Commented Sep 6, 2022 at 10:47

A1exandr Belan · Accepted Answer · 2022-09-06 11:26:15Z

2

As @efkah pointed out, the RegEx solution here:

const files = [{'File_12345.ZLM':{MeterID_12345:{BASIC_INFO:[]}}},{'File_678910.ZLM':{MeterID_678910:{BASIC_INFO:[]}}}];

const renamed = JSON.stringify(files)
  .replaceAll(/File_\d+\.ZLM/g, 'FileName')
  .replaceAll(/MeterID_\d+/g, 'MeterId');
  
const result = JSON.parse(renamed);

console.log(result);

.as-console-wrapper { max-height: 100% !important; top: 0 }

answered Sep 6, 2022 at 11:26

A1exandr Belan

4,7803 gold badges30 silver badges53 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Salketer · Accepted Answer · 2022-09-06 10:49:36Z

The idea is to grab the keys of the objects, since there is only one. With that we get to know the key we want to replace. Do it for both keys and voilà!

I've added a second way to do it, to flatten the objects a bit to make them easier to use, and to also not loose the filename and meterid info.

const files = [{
  'File_12345.ZLM': {    
    MeterID_12345: {     
      BASIC_INFO: []

    }
  }
},
{
  'File_678910.ZLM': {
    MeterID_678910: {
      BASIC_INFO: [],
    }
  }
}];

console.log(files.map(f=>{
  const filename = Object.keys(f)[0];
  f.FileName = f[filename]; delete f[filename];
  const MeterId = Object.keys(f.FileName)[0];
  f.FileName.MeterId = f.FileName[MeterId]; delete f.FileName[MeterId];
  return f;
}));

const files2 = [{
  'File_12345.ZLM': {    
    MeterID_12345: {     
      BASIC_INFO: []

    }
  }
},
{
  'File_678910.ZLM': {
    MeterID_678910: {
      BASIC_INFO: [],
    }
  }
}];
console.log(files2.map(f=>{
  const filename = Object.keys(f)[0];
  const MeterId = Object.keys(f[filename])[0];
  return {FileName:filename,MeterId,BASIC_INFO:f[filename][MeterId].BASIC_INFO};
}));

TimoDevs · Accepted Answer · 2022-09-06 12:51:34Z

    const data = [{
    'File_12345.ZLM':{
        MeterID_12345: {
            BASIC_INFO: []
            } 
        }
    },{ 'File_678910.ZLM': { MeterID_678910: { BASIC_INFO: [], } } }]
    
const obj = data.map(item => {
    const Meterkeys = Object.keys(item)
    const Meterkey = Meterkeys.find(k => k.includes('File'))
    if (Meterkey) {
        const Filekeys = Object.keys(item[Meterkey])
        const Filekey = Filekeys.find(k => k.includes('Meter'))
        const res = {
            ...item,
            FileName: {
                ...item[Meterkey],
                MeterId: (item[Meterkey])[Filekey]
            }
        }
        delete res[Meterkey]
        delete res.FileName[Filekey]
        return res;
    } else {
        return item
    }
    })
console.log(obj)

Tyler2P · Accepted Answer · 2022-09-10 10:23:09Z

0

const obj = {oldKey: 'value'};

obj['newKey'] = obj['oldKey'];
delete obj['oldKey'];

console.log(obj); // 👉️ {newKey: 'value'}

edited Sep 10, 2022 at 10:23

Tyler2P

2,37030 gold badges26 silver badges34 bronze badges

answered Sep 6, 2022 at 10:43

Sujin S R

311 silver badge4 bronze badges

3 Comments

Aksheet-Goku Over a year ago

keys are not static they are dynamic so cannot target it specifically.

Sujin S R Over a year ago

ok will do it ! thanks for the feedback

Sujin S R Over a year ago

@Aksheet-Goku we can use the looping method right !

Collectives™ on Stack Overflow

How to replace the keys "names" in javascript

4 Answers 4

Comments

Comments

Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

4 Answers 4

Comments

Comments

Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related