How to loop through the attributes of a JSON obj? [duplicate]

Question

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How to loop on a JSON object?

I'm trying to find out how to loop through the attributes of a JSON obj. I can get the attributes by specifying the key (see below), but how do I just loop through all of them?

var jsonStr = '{"Items":[{"Title": "Title 1", "Description":"Description 1"}]}';

var json_parsed = $.parseJSON(jsonStr);


// Cycle through all list items
$.each(json_parsed.Items, function(i, val) {
    var listItem = $(this);

    var title = listItem.attr('Title');
    var description = listItem.attr('Description');

    // Instead, loop through all attributes

}

Answer 1

for (var name in json_parsed) {
    console.log(name + "=" + json_parsed[name]);
}

If you need to check if the corresponding property is defined on the object in question, not on some of those on the prototype chain (this is ridiculous for the case in question, but still useful), you can add this check:

if (json_parsed.hasOwnProperty(name))
    console.log(name + "=" + json_parsed[name]);

EDIT

To actually iterate all array objects' attributes, use this snippet:

var items = json_parsed.Items;
for (var i = 0; i < items.length; ++i) {
    console.log("Item #" + i);
    for (var name in items[i]) {
        console.log(name + "=" + items[i][name]);
    }
}