Conversion of data format from a single object to an array of objects of key value pairs

Question

I have a data in a single object as json-format:

var a = {
    "1": "alpha",
    "2": "beta",
    "3": "ceta"
}

I want to convert it into the following format:

var b = [
    {id: 1, label: "alpha"},
    {id: 2, label: "beta"},
    {id: 3, label: "ceta"}
];

Can someone suggest a way to do this?

Nikhil Aggarwal · Accepted Answer · 2016-02-22 12:37:14Z

5

You can try following

var a = {
  "1": "alpha",
  "2": "beta",
  "3": "ceta"
}

var b = [];

for (var key in a) {
  if (a.hasOwnProperty(key)) {
    b.push({
      "id": key,
      "label": a[key]
    });
  }
}

console.dir(b);

Please note - You need to update your object a - Commas are missing

answered Feb 22, 2016 at 12:37

Nikhil Aggarwal

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Comments

Nina Scholz · Accepted Answer · 2016-02-22 12:39:03Z

5

This proposal features Object.keys() and Array#map().

var a = { "1": "alpha", "2": "beta", "3": "ceta" },
    b = Object.keys(a).map(function (k) {
        return { id: k, label: a[k] };
    });

document.write('<pre>' + JSON.stringify(b, 0, 4) + '</pre>');

answered Feb 22, 2016 at 12:39

Nina Scholz

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2 Comments

thefourtheye Over a year ago

I meant to do this but then wrote something else entirely :D. Thanks for pointing out.

Nikhil Aggarwal Over a year ago

@Nina - Nice answer!

gurvinder372 · Accepted Answer · 2016-02-22 12:36:39Z

4

try

var b = [];

for ( var key in a )
{
   b.push( { id : key, label :a[key] } );
}
console.log(b);

answered Feb 22, 2016 at 12:36

gurvinder372

68.6k11 gold badges78 silver badges98 bronze badges

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