Convert NodeList to Array
Now that most browsers have implemented querySelectorAll, the native selectorEngine, many framework-dependent developers are getting a rude awakening when dealing with the result of QSA calls: the NodeList object. NodeLists are array-like but don't feature many of the methods provided by the Array, like
var nodesArray = Array.prototype.slice.call(document.querySelectorAll("div"));
The result of the code above is a true Array object containing all of the nodes returned by the QSA. You could even make the code shorter with this alternative:
var nodesArray = .slice.call(document.querySelectorAll("div"));
Both snippets will give you an Array for which you can iterate over and do all those other awesome array things!