Question

9

rated 0 times [ 16] [ 7] / answers: 1 / hits: 34360 / 12 Years ago, mon, march 19, 2012, 12:00:00

I have a JSON array like below:

var jsonArray = [{k1:v1},{k2:v2},{k3:v3},{k4:v4},{k5:v5}]

I don't know which keys does exists in this array.
I want to get all the existing key from the array.

It should be possible something like this:

for(i=0;i<jsonArray.lenght;i++){

  // something like-  key = jsonArray[i].key

  // alert(key);

}

Please tell me the method or way to get all keys existing in Json array.

Regards

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Total Points: 284

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Location: Venezuela

Member since Thu, Jul 15, 2021

3 Years ago

answered 12 Years ago destiniemartinac · Accepted Answer

Try this:

var L = jsonArray.length;

for (var i = 0; i < L; i++) {

    var obj = jsonArray[i];

    for (var j in obj) {

        alert(j);

    }

}

I've also made some modifications of your current code (like length caching).