Get this of this

Asked Jul 02 '15 at 04:43

Active Jul 02 '15 at 04:49

Viewed 41 times

(purely fictional!)

How can descend() return 1,2,3...?

obj = {
    val: 1,
    obj: {
        val: 2,
        obj: {
            val: 3,
            obj: {
                val: 4,
                descend: function() {
                    return this.val;
                }
            }
        }
    }
}

obj.obj.obj.obj.descend();

asked Jul 02 '15 at 04:43

dmvianna

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106

This just return 4 not 1,2,3,4 – Bhojendra Rauniyar Jul 02 '15 at 04:45
1

@BhojendraNepal I know. Hence the question. – dmvianna Jul 02 '15 at 04:47
It can’t unless it has some other means of reference, and `var x = obj.obj.obj.obj; x.descend();` will always have the same effect. – Ry- Jul 02 '15 at 04:47
@minitech, so how can I reference downstream scopes? – dmvianna Jul 02 '15 at 04:48
Just create objects one by one. – zerkms Jul 02 '15 at 04:49
1

You would have to explain why you need to do that to get an alternative solution. Those aren’t even “downstream scopes”; they’re just objects. – Ry- Jul 02 '15 at 04:49
@minitech, I don't have an application. This is just an intellectual exercise. – dmvianna Jul 02 '15 at 04:50
Then the answer is that you can’t do that just from within `descend`. You could hack it together by using getters, but that’s not much more effective than keeping a reference to the object. – Ry- Jul 02 '15 at 04:51
"intellectual exercise" --- it's an exercise for checking JS basics knowledge, far from something "intellectual" – zerkms Jul 02 '15 at 04:51
@zerkms, I'm happy to call it a "dumb" exercise. Whatever floats your boat. :7) – dmvianna Jul 02 '15 at 04:53
4

Just doubt why this question is downvoted? I prefer this question over "help please fix my code" questions out there actually. – TaoPR Jul 02 '15 at 04:58
2

http://stackoverflow.com/q/2980763/251311 – zerkms Jul 02 '15 at 05:01
Thanks, @zerkms! That answers my question. :7) – dmvianna Jul 02 '15 at 05:09

Get this of this

0 Answers0