What object would you use in Prototype, and what are the benefits of using said object?

How can you get a copy of the array without any null or undefined values?

The code: var json = transport.responseText.evalJSON(true); will check for what?

There is an object in Prototype that is informed about every Ajax request: Ajax.Responders. Is it possible to register callbacks that will fire on a state of ANY Ajax.Request?

What do you use to add your own custom DOM methods?

Which PrototypeJS method of functions have become a native method of functions?

How can you inherit from a Storage class?

Element#on has what distinct and beneficial features in Prototype 1.7?

Which namespace is not typically used directly but mixed in to other namespaces?

What is the value of t at the end of this code snippet? var t = 1; $R(0,100,true).each(function(){ t++; }); console.log(t);

After editing your browser script to work with Prototype extensions, what coding can you add to the end to make it function more solidly?