Parsing JSON in Java without knowing JSON format in javascript

Question

Is there an equivalent in Javascript for this following functionality achieved through Java?

To be able to iterate through an simple to complex/ nested JSON structure without knowing the JSON format.

I am in need of this functionality to get hold of all the innermost keys and that hold a direct value and not object/array as its value.

In this fiddle, Object.keys() only gives the outermost keys. I want to be able to get (id, type)

console.log(Object.keys(x));

you can loop over a object properties without the use of keys — madalinivascu, Jun 05 '18 at 12:51
I have seen this answered on this site multiple times. Go look — bassxzero, Jun 05 '18 at 12:51
@GabrielCarneiro: Object.keys() gives only the outermost keys — we bendthetrend, Jun 05 '18 at 12:54
Possible duplicate of [Access / process (nested) objects, arrays or JSON](https://stackoverflow.com/questions/11922383/access-process-nested-objects-arrays-or-json) — Louys Patrice Bessette, Jun 05 '18 at 13:02

score 1 · Answer 1 · answered Jun 05 '18 at 13:07

You can build it yourself, just iterate the keys of the object recursively if it is an object, see this small example:

    const getAllPropertiesRecursively = (obj) => {
    const propertyKeys = [];
    Object.keys(obj).forEach(key => {
        const value = obj[key];
        if (value && !Array.isArray(value)) {
            if (value.toString() === '[object Object]') {
                propertyKeys.push(...getAllPropertiesRecursively(value));
            } else {
                propertyKeys.push({[key]: value}); // here you store the keys and values that are not array nor object
            }
        }
    });
    return propertyKeys;
}

So when you call this method like this:

getAllPropertiesRecursively({a:1, b:2, c: { d: 1}, e: [1,2,3,4], f: {g:2}});

You get an array like:

[{a: 1}, {b: 2}, {d: 1}, {g: 2}]

You can edit the line with the comment to store the data in the way you want

Consider this data : key array is empty : { "i": { "i1": [{ "id": "0001", "b": { "b1": [{ "d1": "t1", "coordinates": [19.291422,73.53197 ] }, { "d3": "t3", "d4": "t4" } ] }, "c": [{ "d5": "t5", "r1": ["1", "2", "3"] }, { "d6": "t6" } ] }, { "id": "0002", "b": { "b1": [{ "d1": "t1", "d2": "t2" }, { "d3": "t3", "d4": "t4" } ] }, "c": [{ "d5": "t5" }, { "d6": "t6" } ] } ] } } — we bendthetrend, Jun 06 '18 at 05:17
be careful with (typeof obj[property] == "object") because: typeof [] === 'object' // true typeof null === 'object' // true typeof new Date() === 'object' // true See: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof In any case, I just gave you a snippet of what you could do, you can adapt it to your own needs. — A. Llorente, Jun 06 '18 at 06:33

Parsing JSON in Java without knowing JSON format in javascript

1 Answers1