jquery - javascript: access object (array) by array notation string -

i access object provided it's string path in form of array known.

1.) there object, where

root["obj1"]["obj2"] = 1; 

(in common case root["obj1"]...["objn"])

2.) have string objectpath known:

var objectpath = 'root["obj1"]["obj2"]' 

3.) need not read object, set it's value, like

objectpath = 2; //so root["obj1"]["obj2"] === 2 

as understand

1. there might options eval(), gets value, not variable;

2. one can loop through objects of root, make convertion "root.obj1.obj2" (which not case, "obj1" can "obj spaces1") , check if given string equals current object in loop.

http://jsfiddle.net/acspn/

related link: access object child properties using dot notation string

i wrote function you, trying make pretty , reusable possible :

function setprop(path, newvalue, holder) {     var t = path.split(/[\[\]"]+/).filter(function(v){return v}),         l = t.pop(), s, o = holder || window;     while (s = t.shift()) o = o[s];     o[l] = newvalue; } 

you use :

setprop('root["obj1"]["obj2"]', 2); 

if root object isn't in global variable, pass relevant holder third argument.

demonstration (open console see changed root object)