Javascript Object Persistence

Question

How do I do the following whilst protecting the state of b?

var a = function(o){
  this.o = o;
  this.o.one = 'three';
}
var b = {'one':'two'};
var c = new a(b);

console.log(b.one);  //three

I realize that this works...

var a = function(o){
  this.o = {};
  this.o.one = o.one;
  this.o.one = 'three';
}
...

but what if I would like to 'import' the whole object?

EDIT

Thanks everyone!

What exactly are you trying to do? You could use a closure to "protect the state". Is your goal to create a class-like structure? If so, you can create a constructor function. More details about what you are trying to accomplish would help. — PhillipKregg
– PhillipKregg, Commented Sep 18, 2012 at 3:25
Template objects that contain html and css shortcode anchors which are combined to create differently styled things to present to the client, but my template objects kept getting altered. — user1101431
– user1101431, Commented Sep 18, 2012 at 3:35
Sounds like you may want to look into a databinding framework for JavaScript: KnockoutJS, AngularJS, and Ember are all good. — PhillipKregg
– PhillipKregg, Commented Sep 18, 2012 at 4:21

Community · Accepted Answer · 2017-05-23 10:27:04Z

1

You need to copy b. Look here for the idea and some caveats.

CommunityBot

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answered Sep 18, 2012 at 3:26

Jordão

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