Using a var only to prevent someone from deleting the value and then only inside a functional scope
Setting Global variables and binding them to calls so they execute and understanding what is in the scope of the DOM upon execution
Finally He introduced me to assigning prototypes so on runtime the scope of the result can be determined, which was pretty much over my head.
Well formed code
Importance of explicitly using semicolons
Absolutely correct way to comment js…/* not // and he showed why
Charming presenter and absolutely top notch domain expert