Techniques for navigating unidentified JSON structures using JavaScript

Question

Techniques for navigating unidentified JSON structures using JavaScript

Currently, I am faced with the challenge of parsing the given data:

{
  'unknown-value': {
    name: 'AB',
    id: 'BLUE'
  },
  'unknown-value': {
    name: 'AC',
    id: 'PURPLE'
  }
}

My objective is to parse this data and then generate arrays of values like the following:

names = ['AB', 'AC']
ids = ['BLUE', 'PURPLE']

This scenario is a bit different from what I have encountered before, as it does not involve an array of objects. Therefore, I am currently unsure of the best approach to take.

javascript json parsing

Answer 1

Answer №1

To iterate through an array of objects, use the forEach method.
Retrieve the values of the object using Object.values().
Then, use forEach to loop through these values and push them into separate arrays for names or ids.

   
const obj = [{
  'unknown-value': {
    name: 'AB',
    id: 'BLUE'
  },
  'unknown-value2': {
    name: 'AC',
    id: 'PURPLE'
  }
}]

let names = [];
let ids = [];

obj.forEach((x) => { 
Object.values(x).forEach((y)=>{
  names.push(y.name);
  ids.push(y.id);
 })
})

console.log(names);
console.log(ids);

Answer 2

To iterate through an array of objects, use the forEach method.
Retrieve the values of the object using Object.values().
Then, use forEach to loop through these values and push them into separate arrays for names or ids.

   
const obj = [{
  'unknown-value': {
    name: 'AB',
    id: 'BLUE'
  },
  'unknown-value2': {
    name: 'AC',
    id: 'PURPLE'
  }
}]

let names = [];
let ids = [];

obj.forEach((x) => { 
Object.values(x).forEach((y)=>{
  names.push(y.name);
  ids.push(y.id);
 })
})

console.log(names);
console.log(ids);

Answer 3

Answer №2

Don't overlook the importance of having that mysterious key handy - Object.entries is a valuable tool:

const transformed = Object.entries(data).map(([key, val]) => ({key, ...val}));

The transformed array now holds objects, each featuring a fresh "key" property denoting the original key.

Answer 4

Don't overlook the importance of having that mysterious key handy - Object.entries is a valuable tool:

const transformed = Object.entries(data).map(([key, val]) => ({key, ...val}));

The transformed array now holds objects, each featuring a fresh "key" property denoting the original key.

Answer 5

Answer №3

const { firstNames, lastNames, } = Object.values({

  'foo': {
    firstName: 'John',
    lastName: 'Doe',
  },
  'bar': {
    firstName: 'Jane',
    lastName: 'Smith',
  }
}).reduce((map, item) => {

  map.firstNames.push(item.firstName)
  map.lastNames.push(item.lastName)

  return map;

}, { firstNames: [], lastNames: [] });

console.log('firstNames :', firstNames);
console.log('lastNames :', lastNames);

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

Answer 6

const { firstNames, lastNames, } = Object.values({

  'foo': {
    firstName: 'John',
    lastName: 'Doe',
  },
  'bar': {
    firstName: 'Jane',
    lastName: 'Smith',
  }
}).reduce((map, item) => {

  map.firstNames.push(item.firstName)
  map.lastNames.push(item.lastName)

  return map;

}, { firstNames: [], lastNames: [] });

console.log('firstNames :', firstNames);
console.log('lastNames :', lastNames);

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

Answer 7

Answer №4

Give this method a try and watch as the desired outcome unfolds effortlessly

data = {
  'mystery-data': {
    label: 'X',
    code: '123'
  },
  'mystery-data': {
    label: 'Y',
    code: '456'
  }
};

labels = [];
codes = [];

for (index in data) {
    labels.push(data[index].label);
    codes.push(data[index].code);        
}

for (item of labels) {
    console.log(item);
}

for (item of codes) {
    console.log(item);
}

Answer 8

Give this method a try and watch as the desired outcome unfolds effortlessly

data = {
  'mystery-data': {
    label: 'X',
    code: '123'
  },
  'mystery-data': {
    label: 'Y',
    code: '456'
  }
};

labels = [];
codes = [];

for (index in data) {
    labels.push(data[index].label);
    codes.push(data[index].code);        
}

for (item of labels) {
    console.log(item);
}

for (item of codes) {
    console.log(item);
}

Techniques for navigating unidentified JSON structures using JavaScript

Answer №1

Answer №2

Answer №3

Answer №4

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