YUI3: How to get an Item from YUI object

Get an item from YUI3 object using this syntax:

obj.item(num)

Ex1:
for(var i=0, len=yuiObj.size(); iEx2: Or using each method:

yuiObj.each(function(ele, idx) {

// this and ele represent the same thing
this.on('click', evenHandler);
// or
ele.on('click', eventHandler);

});