Let's I have next object
var o = { "foo" : {"bar" : "omg"} };
I can get value of key foo using
o["foo"] // return {"bar" : "omg"}
and I can get value of key bar inside foo using
o["foo"]["bar"] // return "omg"
Can I get value of key bar inside foo using brackets [] single time.
Somethong like
o["foo.bar"] // not working(
or
o["foo/bar"] // not working(
It is fairly common to create a getter function to do something like this. From the comment:
I have object o and string 'foo.bar', and i want get "omg".
var getProp = function (theObject, propString) {
var current = theObject;
var split = propString.split('.');
for (var i = 0; i < split.length; i++) {
if (current.hasOwnProperty(split[i])) {
current = current[split[i]];
}
}
return current;
};
Note: this is a thrown together example, you'd want to bullet proof and buff it up before dropping it on your site.
No, you must use o["foo"]["bar"] because it's an object inside another object. If you want to access it with "foo.bar", it means you must create the first object like this:
var o = {"foo.bar": "omg"}
o["foo.bar"] or o["foo/bar"] are not valid for your example. You could use this notation that is cleaner:
var bar = o.foo.bar // bar will contain 'omg'
there is a way, but I'm not sure this is what you asked for:
eval("o.foo.bar");
it is dangerous though, and doesn't use [] , but if what you want is to use a string for accessing any object it works
Unfortunately, you can only use o["foo"]["bar"] or o.foo.bar
o['foo']['bar']oro.foo.bar?bar), right?oand string'foo.bar', and i want get"omg". So I can't useo.foo.bar