How to change the format of a JSON data in Javascript?

Question

I get a JSON data with this format:

{
 key1: val1,
 key2: val2,
 key3: val3,
 key4: val4,
 ..
}

Now I want to change it to another format in Javascript:

[
    {key: "key1", value: value1},
    {key: "key2", value: value2},
    {key: "key3", value: value3},
    {key: "key4", value: value4},   
    ...     
]

Is there some libraries that can do this? Or I have to write a function?

Please give me some tips! Thanx!

really? Today is the first day I use javascript. I am not quite familiar with it. I think I should get each item in the raw data, get key and value, then put them togerther — Jane
– Jane, Commented Nov 11, 2013 at 14:44

David Hedlund · Accepted Answer · 2013-11-11 14:43:46Z

7

var newObject = Object.keys(originalObject).map(function(k) { 
  return { key: k, value: originalObject[k] };
});

answered Nov 11, 2013 at 14:43

David Hedlund

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2 Comments

Nevin Over a year ago

Where can i study more about this..? Can you provide a useful link? (I meant the map and key functions which i never knew existed)

David Hedlund Over a year ago

@NevinMadhukarK: I don't have a useful link that happens to cover both those two functions, other than pointing to the JavaScript references. MDN is a good resource in general. You can find all the functions available on Object here. You should also check out the reference for Array.prototype, it has a lot of good stuff. Besides map, read up on reduce, filter, some, every.

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