DART language

I have crazy gaps in my knowledge.I have posted more than 1600 blog posts each of which answers a question that I could not answer when I started. One might think that I know a lot by know. Maybe I do, but there are still some crazy gaps in my ... [More] knowledge. This is why I love programming.Tonight, I would like to be able to answer what double dispatch means in object oriented methods. Having read the Gang of Four book, I think I might already be able to provide an acceptable answer. One... [Less]