Can I specify object sub-indices with a variable?

Asked Mar 07 '17 at 20:17

Active Mar 07 '17 at 20:17

Viewed 18 times

Any way to specify object sub-indices with a variable?

Say I have a function that looks like this

function getProperty(property) {
    this.data = {
        name: "john",
        age: 35,
        occupation: {
            title: "coder",
            salary: 60000
        }
    };
    return this.data[property];
}

if I want the name I can do

getProperty("name");//john

but if i wanted, the salary, i can't do

getProperty("occupation.salary");

because that would try and fetch a property called literally "occupation.salary"

Is there some way to do something like this?

getProperty(["occupation"]["salary"]) //60000

The point is to be able to take an argument as a single variable and fetch that member of an object, without having parse the argument for a potentially arbitrary depth of sub-indices.

Can this be done?

asked Mar 07 '17 at 20:17

chiliNUT

18,989
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106

There's no built-in facility, but it's easy to write code to do it. There are other questions on the same topic here. In the Java world that's sometimes called "object graph navigation". – Pointy Mar 07 '17 at 20:19
@Pointy if theres a dupe can you point it out? – chiliNUT Mar 07 '17 at 20:19
3

you could look here: http://stackoverflow.com/q/42598589/1447675 – Nina Scholz Mar 07 '17 at 20:20
1

Great, thanks @FelixKling, I knew someone must have asked this before – chiliNUT Mar 07 '17 at 20:22
1

There is this: http://stackoverflow.com/questions/6393943/convert-javascript-string-in-dot-notation-into-an-object-reference – trincot Mar 07 '17 at 20:22
1

I'm really bad at finding duplicates :) Thanks! – Pointy Mar 07 '17 at 20:24
thanks for all the dupes! – chiliNUT Mar 07 '17 at 20:29

Can I specify object sub-indices with a variable?

0 Answers0