Oh yes, I remember the programming guides! When a friend of mine and I wrote the text editor Tincta we spend days to go through the typesetting, font, glyphs do

Oh yes, I remember the programming guides! When a friend of mine and I wrote the text editor Tincta we spend days to go through the typesetting, font, glyphs documents. We didn't really use it but we learned so much (we were still students and couldn't imagine how complicated all that is). Same for the maps and location APIs. You could really appreciate all the work and design that went into the APIs. Now I feel some of that information is hidden in WWDC videos but it's not the same. I also had good experience with the Android documentation, same (as the article stated) for PHP and most of Microsoft.