CODEWITHSUNDEEP
javascriptnode.jsarraysjson
Aksheet-Goku
Aksheet-Goku

Reputation: 71

How to replace the keys "names" in javascript

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],
    }
  }
}

Upvotes: 1

Views: 119

Answers (4)

Sujin S R
Sujin S R

Reputation: 31

const obj = {oldKey: 'value'};

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

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

Upvotes: 0

TimoDevs
TimoDevs

Reputation: 182

    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)

Upvotes: 0

A1exandr Belan
A1exandr Belan

Reputation: 4780

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 }

Upvotes: 2

Salketer
Salketer

Reputation: 15711

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};
}));

Upvotes: 1

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