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How to find the second key name in JSON using javascript

I have a JSON message

[{"Num": 10, "SubLoc": "Chamr"}, {"Num": 34, "SubLoc": "angala"}, {"Num": 4, "SubLoc": "avano"}]

How can I only find the second key value, i.e. SubLoc in the above case, using javascript or jquery? I don't want to hardcoded the value in the javascript object because the key value changes in every post.

EDIT: Below code can provide us with Key: Value data

jobs = [{"Num": 10, "SubLoc": "Chamr"}, {"Num": 34, "SubLoc": "angala"}, {"Num": 4, "SubLoc": "avano"}]

jobs.forEach(function(job) {
Object.keys(job).forEach(function(key) {
    alert(key + ':' + job[key]);
});
});

I just need the data of the second key ie, "SubLoc" in this case.

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3 answers 


var jobs = [{ "Num": 10, "SubLoc": "Chamr" }, { "Num": 34, "SubLoc": "angala" }, { "Num": 4, "SubLoc": "avano" }]
var secondKey;
jobs.some(function (job) {
    Object.keys(job).forEach(function (key) {
        if (key !== 'Num') {
            secondKey = key;
        }
    });
    return true;
});
alert(secondKey);


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Here is a jsfiddle for that



var dataJson = '[{"Num": "10", "SubLoc": "Chamr"}, {"Num": "34", "SubLoc": "angala"}, {"Num": "4", "SubLoc": "avano"}]';

var data = JSON.parse(dataJson);



for (var eachObj in data){
    var keys = Object.keys(data[eachObj]);

    alert(keys[1] + ' : ' + data[eachObj][keys[1]]);
}
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jobs = [{"Num": 10, "SubLoc": "Chamr"}, {"Num": 34, "SubLoc": "angala"},{"Num": 4, "SubLoc": "avano"}]
var secondKeyValue = Object.keys(jobs[0])[1];
alert( secondKeyValue)
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