Javascript scopes in coffeescript for Google Analytics Code -

the codes google analytics use global _gaq object analytics commands. advise check if such object exists, this:

var _gaq = _gaq || []; // command _gaq.push(['_trackpageview']);

in coffeescript, this:

_gaq = _gaq or []

which compiles this:

(function() {     var _gaq;     _gaq = _gaq || []; }).call(this);

how can write coffeescript code lead behaviour of above javascript?

to make _gaq variable available in global scope write in coffeescript:

_gaq = window._gaq ?= []

the javascript output:

var _gaq, _ref; _gaq = (_ref = window._gaq) != null ? _ref : window._gaq = [];

this way can latter call _gaq.push(['_trackpageview']);

there another question in stackoverflow talks global variables in coffeescript might want check.

Brande