Getting first JSON property

Question

Is there a way to get the name of the first property of a JSON object?

I\'d like to do something like this:

var firstProp = jsonObj[0];

<

Answer 1

Great question. I don't know of any way besides iterating in a for-in loop. You only need to iterate once though. For safety, ensure it's a known property [more info].

for (var propName in jsonObj) {
    if (jsonObj.hasOwnProperty(propName)) {
        return propName;    // or do something with it and break
    }
}

Edited to be extra clear that you're iterating over the property names, not their values.