I needed some touch ups on vector and your informative article helped me a lot. Thank you :)
(you can remove the following text if you want) --> Just a quick and mostly technically irrelevant note: there are few areas that vector has been written as ctors. not a big deal at all comparing to the length and informativeness of your article. Thank you :)
Very well written! Thank you for this.
One small thing: I am red/green colorblind and had a hard time reading the greenish text (parenthesis and things like or ) against the gradient background. The only way I could see it is by highlighting it via selection with the mouse.