How to convert an object to array of multiple objects in javascript

Question

I have an object of data and I want to split it array of objects

let data = {
    "education_center-266": "Software House x",
    "education_center-267": "Learning Academy xyz",
    "end_date-266": "2022-01-26",
    "end_date-267": "2021-01-22",
    "start_date-266": "2021-01-26",
    "start_date-267": "1998-11-26",
    "title-266": "Web Developer",
    "title-267": "Teacher",
}

I tried differents ways but couldn't reach the result I want.. the result should be

[
    {
        id: "266",
        education_center: "Software House x",
        title: "Web Developer",
        start_date: "2021-01-26",
        end_date: "2022-01-26",
    },
    {
        id: "267",
        education_center: "Learning Academy xyz",
        title: "Teacher",
        start_date: "1998-11-26",
        end_date: "2021-01-22",
    },

]

Welcome to Stack Overflow! Please take the tour if you haven't already (you get a badge!) and read through the help center, in particular How do I ask a good question? Your best bet here is to do your research, search for related topics on SO and elsewhere, and give it a go. If you get stuck and can't get unstuck after doing more research and searching, post a minimal reproducible example showing your attempt and say specifically where you're stuck. People will be glad to help. (not my downvote) — T.J. Crowder
– T.J. Crowder, Commented Jan 27, 2022 at 10:06
Side note: The code block at the top of your question has syntax errors. If those property names really have - in them, they must be in quotes (single or double, either is fine). — T.J. Crowder
– T.J. Crowder, Commented Jan 27, 2022 at 10:06

savageGoat · Accepted Answer · 2023-11-15 12:59:46Z

const data = {
    "education_center-266": "Software House x",
    "education_center-267": "Learning Academy xyz",
    "end_date-266": "2022-01-26",
    "end_date-267": "2021-01-22",
    "start_date-266": "2021-01-26",
    "start_date-267": "1998-11-26",
    "title-266": "Web Developer",
    "title-267": "Teacher",
};

const myObjects = {};
Object.keys(data).forEach((key) => {
    const splitKey = key.split('-');
    const elemId = splitKey[1];
    const realKey = splitKey[0];

    if (!myObjects[ elemId ]) {
        myObjects[ elemId ] = { id: elemId }; // Create entry
    }
    myObjects[ elemId ][ realKey ] = data[ key ]; 
});

const myID = 266;

// Turn into array
const myObjectsToArray = Object.values(myObjects);
// Or use the myObjects as a key/value store with ID as index
const selectedElement = myObjects[ myID ];

console.log(myObjects);
console.log(myObjectsToArray);
console.log(selectedElement);

widdy · Accepted Answer · 2022-01-27 10:34:46Z

const data = {
  "education_center-266": "Software House x",
  "education_center-267": "Learning Academy xyz",
  "end_date-266": "2022-01-26",
  "end_date-267": "2021-01-22",
  "start_date-266": "2021-01-26",
  "start_date-267": "1998-11-26",
  "title-266": "Web Developer",
  "title-267": "Teacher"
};

const results = [];

function splitKey(key) {
  const indexOfDelimiter = key.lastIndexOf("-");

  return {
    id: key.substring(indexOfDelimiter + 1),
    key: key.substring(0, indexOfDelimiter)
  };
}

function getItemFromResults(id) {
  return results.find((r) => r.id === id);
}

function processKeyValuePair(id, key, value) {
  const item = getItemFromResults(id);

  if (!item) {
    results.push({ id, [key]: value });
    return;
  }

  item[key] = value;
}

for (const k in data) {
  const { id, key } = splitKey(k);
  const value = data[k];

  processKeyValuePair(id, key, value);
}

MWO · Accepted Answer · 2022-01-27 10:37:27Z

Here a slightly different solution, first getting all unique id's, then builiding the result array with looping over Object.entries.

let data = { "education_center-266": "Software House x", "education_center-267": "Learning Academy xyz", "end_date-266": "2022-01-26", "end_date-267": "2021-01-22", "start_date-266": "2021-01-26", "start_date-267": "1998-11-26", "title-266": "Web Developer", "title-267": "Teacher", }

const ids= [...new Set(Object.keys(data).map((el)=>{
    return el.split('-')[1]
}))];

console.log(ids) //unique id's

let result = [];

ids.forEach((i)=>{
    let obj={id: i}
    Object.entries(data).forEach((el)=>{
        if(el[0].includes(i)) obj[el[0].split('-')[0]]=el[1];
    })
    result.push(obj)
})


console.log(result);

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