[javascript] JavaScript set object key by variable

I am building some objects in JavaScript and pushing those objects into an array, I am storing the key I want to use in a variable then creating my objects like so:

var key = "happyCount";
myArray.push( { key : someValueArray } );

but when I try to examine my array of objects for every object the key is "key" instead of the value of the variable key. Is there any way to set the value of the key from a variable?

Fiddle for better explanation: http://jsfiddle.net/Fr6eY/3/

This question is related to javascript

The answer is

You need to make the object first, then use [] to set it.

var key = "happyCount";
var obj = {};
obj[key] = someValueArray;

UPDATE 2018:

If you're able to use ES6 and Babel, you can use this new feature:

    [yourKeyVariable]: someValueArray,

Similar questions with javascript tag: