Chaining objects by siblings in javascript

Question

I have a simple problem, there is an object, which elements have an array of their connections. Only to the siblings:

var obj = {
    1: [2],
    2: [1,3],
    3: [2,4],
    4: [3],

    5: [6],
    6: [5]
}

There is two connections, the first 4 is connected to each other, and the 5. and 6. too. I would get a list depend on a selected element, about who is connected to each other. So if I select the giveMeTheListOfSiblingIn(3), i would like to get this list: [1,2,3,4].

It's not to difficult, by I can't get the solution, always avoid infinite loop. Here is my trying in JSFiddle, I used the Lo-Dash framework, but you do not have to.

Thanks in advance!

Answer 1

Here's my suggested solution, with a little modification of the call function's parameters. Maybe you would like to send obj as a param too.

var obj = {
    1: [2],
    2: [1,3],
    3: [2,4],
    4: [3],
    5: [6],
    6: [5]
}
list = [];
function call(id) {

    if (list.indexOf(id) == -1) {
       list.push(id);
       obj[id].forEach(call)
    }
    return list;
}

var result = call(6);

console.log(result);

http://jsfiddle.net/9L5s6/1/