javascript: Define reference in nested object to parent object

Question

I have following object:

var myObject = {
    attributes: { name: "dev.pus", age: 29 },
    someInjectedObject: {
        name: "someComponent",
        action: function() {
            // do something
            return this.this.attributes.name; // this surely won't work :(
        }
    }
};

As you see I want to get myObject.attributes.name from an nested part of the object without having to observe the value.

How do I do this? How do I define a reference?

EDIT: A simple myObject.attributes isn't enough because myObject changes or better gets assigned to a new variable.

possible duplicate of Emulate super in javascript

Kijewski
– Kijewski

2012-07-15 15:41:06 +00:00
Commented Jul 15, 2012 at 15:41 — Kijewski
– Kijewski, Commented Jul 15, 2012 at 15:41

Dmitry Osinovskiy · Accepted Answer · 2012-07-15 13:47:45Z

4

Create a closure around your object:

var myObject = (function() {
  var result = {
    attributes: { name: "dev.pus", age: 29 },
    someInjectedObject: {
      name: "someComponent",
      action: function() {
        // do something
        return result.attributes.name;
      }
    };
  };
  return result;
})();

edited Jul 15, 2012 at 13:47

answered Jul 15, 2012 at 13:23

Dmitry Osinovskiy

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4 Comments

Dmitry Osinovskiy Over a year ago

I've updated my answer. You shouldn't downvote answers if you change your question.

dev.pus Over a year ago

Hmm, this would be a possible solution but hard to integrate (I would have to rewright all my Backbone.Model implementations. Maybe there will come another answer. PS: I didn't downvote...

Dmitry Osinovskiy Over a year ago

@dev.pus Instead of creating new closure you can simply create a copy of myObject variable that wouldn't change. This is ugly, but would work. P.S. Sorry for suspecting you :)

dev.pus Over a year ago

Hmm, I will wait a bit with the final answer mark but it seems that I will have to refactor a lot using closures :)

qwertymk · Accepted Answer · 2012-07-15 13:23:59Z

0

You can do refer to myObject directly like this:

var myObject = {
    attributes: { name: "dev.pus", age: 29 },
    someInjectedObject: {
        name: "someComponent",
        action: function() {
            // do something
            return myObject.attributes.name; // this surely will work :(
        }
    }
};

alert(myObject.someInjectedObject.action());

DEMO

answered Jul 15, 2012 at 13:23

qwertymk

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1 Comment

Esailija Over a year ago

He says in his question that As you see I want to get myObject.attributes.name from an nested part of the object without having to observe the value. I guess he wouldn't even ask this question if this solution was acceptable

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