Javascript: Object attribute declaration from variable

Question

I am aware I can use another object's property as a key to declare a property of the object, like so:

var object1 = {
    myAttr: 'myName'
};
var object2 = {};
var object2[object1.myAttr] = 'myValue';

Then we have object2.myName == 'myValue'.

How would I go about doing that directly in the object's declaration? Something like that:

var object1 = {
    myAttr: 'myName'
};
var object2 = {
    object1.myattr: 'myValue'
};

But that actually works.

Luizgrs · Accepted Answer · 2014-06-03 12:50:32Z

2

You could change your code a bit and do this:

var object1 = {
     myAttr: 'myName'
};

var object2 = new function(){
    this[object1.myAttr] = 'myValue'
}();

You can evolve this and pass object1 as an attribute to the object2 function and things go on...

answered Jun 3, 2014 at 12:50

Luizgrs

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Comments

S A M · Accepted Answer · 2014-06-03 12:50:57Z

-1

You can do using eval function of javascript

var object1 = {   myAttr: 'myName' };
eval("var object2 = { "+object1.myAttr+": 'myValue' }");
console.log(object2.myName);

answered Jun 3, 2014 at 12:50

S A M

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