Javascript accessing multidimensional Array without knowing all keys

Question

I have a little experience in Javascript and usually I found solution to my problems just by searching here or with Google But this time, I feel that I took the wrong path

I have build an Object (multidimensional associative array) like this : state["a"]["b"]["c"] = "idle";

If I know "a" and "c" but not "b", can I change the value "idle" , without looping through each keys ? taking into account that "c" is unique in the whole object

Something like : state["a"][*]["c"] = "busy";

Thanks in advance for your help

no you can not, and if you don't know the keys, how can you assure they are to be unique? you have to write a tree parser most likely using recursion. depending on what environment/browser you are to support you can use Object.keys or "for in" loop — Dayan Moreno Leon
– Dayan Moreno Leon, Commented Apr 16, 2016 at 18:02
So you know: there are no "multidimensional" structures in JS. They are simply nested objects/arrays. — Andy
– Andy, Commented Apr 16, 2016 at 18:10
I know that key is unique as I build the object using some data from which is value can't exist twice ! Just in the current function "b" isn't used nor known ... Too bad, I will loop with Object.keys ... Thanks — ericc
– ericc, Commented Apr 16, 2016 at 19:22

RJM · Accepted Answer · 2016-04-16 18:06:41Z

1

If "c" only exists in one place as you've stated, then you'll need to loop through the items in the second dimension looking for the one that has a third dimension with an index of "c".

answered Apr 16, 2016 at 18:06

RJM

1,1969 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

ericc Over a year ago

This is exactly what I would like to avoid :-)

Collectives™ on Stack Overflow

Javascript accessing multidimensional Array without knowing all keys

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related