How to order a JSON in descending order?

Question

I have a JSON value that I want to order it in descending order (I think in the example will give to understand).

Example:

var json = {
    'um': {
        'cont': '5'
    },
    'dois': {
        'cont': '10'
    }
    ...
};

So in this case, it should be ordered by the 'cont' value of each son of json.

In the example I used fixed values, but in the code I will use will have many more children in json and the cont values will be different too.

I think I understand, but in the end the figure should be: ['two', 'one'];

Answer 1

You can write a comparison function and pass as parameter of the array’s Sort method.

Example:

function comparer(a, b) {
    if (a.cont < b.cont)
        return -1;

    if (a.cont > b.cont)
        return 1;

    return 0;
}

arr.sort(comparer);

But in this case, json would have to be an array, rather than an object.

EDIT made an example fiddle:

jsfiddle

Reference: https://stackoverflow.com/questions/1129216/sorting-objects-in-an-array-by-a-field-value-in-javascript

Answer 2

I’ve used that one library for sorting and also for filters, in javascript arrays (JSON).

I just don’t know if in your case you can change your object to an array, so it can be ordered.

If you can use an array, this is a great approach.

That library Jlinq is very good, I never had problems with her.

It works with several hierarchical levels of the JSON object, and already implements the comparer proposed by @Miguel.