CODEWITHSUNDEEP
javascriptarraysobject
moto
moto

Reputation: 940

Index an object multiple levels deep with one variable

I have an object:

object.day.time

where I need to access the time property.

Due to the nature of the function, I only have access to the base object. I.E.

function access(property){
    let item = object[property]
    // Do a lot of stuff with item
}

I don't want to rewrite the function because the main use case is accessing objects one level deep. I.E. the day property. Is there any way I can make this work?

The only thing I could think of was:

property = [['day']['time']]

but that didn't work.

EDIT: I originally had object as a param to access which was wrong. I that case I could just pass object.day as a value

Upvotes: 2

Views: 1298

Answers (2)

Vikram Mahishi
Vikram Mahishi

Reputation: 3321

When you call this function pass object.day instead of just the base object which means the object in the function will already be object.day so if you do object.time, you should get the value.

Upvotes: 0

Blauharley
Blauharley

Reputation: 4256

You could do sometime like this to go to this time property:

var object = {
   day: {
      time: (new Date()).getTime()
   }
};

var properties = ["day","time"];

function access(object,properties){
   for(var index=0; index < properties.length; index++){
      // go to deeper into object until your reached time 
      object = object[properties[index]];
   }
   // here we have reached time and can do something with it or just returning it
   return object;
}

console.log(access(object,properties));

Hope this helps you.

Upvotes: 1

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