CODEWITHSUNDEEP
javascript
Casey Crookston
Casey Crookston

Reputation: 13955

Add a child to a JavaScript object with a variable name

Let's say I have a blank JavaScript object:

myObject {}

And I also have a variable:

var myChildObject = this.name.split('.')[1];

For the sake of an example, let's say that myChildObject equals "FooBar". Now, I want to add a child object to myObject with the name of "FooBar", only we can't hard code "FooBar". We have to use the variable name myChildObject.

I tried this:

myObject.appendChild(myChildObject);

That doesn't work.

The goal is this:

{  
   "myObject":{  
      "FooBar":{  
         "thing1":25,
         "thing2":6
      },
      .....
}

But I need to build the entire thing dynamically, without the names (other than the root) being known ahead of time.

Upvotes: 0

Views: 1331

Answers (5)

Booboobeaker
Booboobeaker

Reputation: 86

No idea what your question means but myObject["foobar"] might be what you are looking for

Upvotes: 0

ValLeNain
ValLeNain

Reputation: 2304

I'd say

for(var key in myChildObject) {
  myObject[key] = myChildObject[key]
}

Upvotes: 0

Mustafa Mamun
Mustafa Mamun

Reputation: 2661

var myObject = {};
var myChildObject = this.name.split('.')[1];
myObject[myChildObject] ={  
     "thing1":25,
     "thing2":6
  };

Upvotes: 1

Sam
Sam

Reputation: 317

Objects can only have key value pair. You cannot use one without other. If you don't want to assign a value then simply give undefined. If you don't know the name of the property then you can simply use the array type notation for an object "[]". Refer to code below 

var myObject = {};
var myChildObject = this.name.split('.')[1];

myObject[myChildObject] = undefined;

console.log(myObject.hasOwnProperty(myChildObject)); // true

Upvotes: 1

ChaudPain
ChaudPain

Reputation: 216

An object is a "key value" type of thing, a little bit like a Map in Java. have you tried something like this:

let myObject = {};
let myChildObject = "fooBar";
myObject[myChildObject] = {};

This way you have a "fooBar" key for your Object... now you have to decide what you want the value to be for that key.

Upvotes: 2

Related Questions