Question

50

Javascript/JSON get path to given subnode?

rated 0 times [ 53] [ 3] / answers: 1 / hits: 29172 / 13 Years ago, mon, january 9, 2012, 12:00:00

How would you get a JSON path to a given child node of an object?

E.g.:

var data = {

    key1: {

        children: {

            key2:'value',

            key3:'value',

            key4: { ... }

        }, 

    key5: 'value'

}

An variable with a reference to key4 is given. Now I'm looking for the absolute path:

data.key1.children.key4

Is there any way to get this done in JS?

Thank you in advance.

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cayden

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2 Years ago

answered 13 Years ago tristab · Accepted Answer

So you have a variable with the value key3, and you want to know how to access this property dynamically, based on the value of this string?

var str = key3;

data[key1][children][str];

EDIT

Wow, I can't believe I got this on the first try. There might be some bugs in it, but it works for your test case

LIVE DEMO

var x = data.key1.children.key4;



var path = data;

function search(path, obj, target) {

    for (var k in obj) {

        if (obj.hasOwnProperty(k))

            if (obj[k] === target)

                return path + [' + k + ']

            else if (typeof obj[k] === object) {

                var result = search(path + [' + k + '], obj[k], target);

                if (result)

                    return result;

            }

    }

    return false;

}



var path = search(path, data, x);

console.log(path); //data['key1']['children']['key4']