All very interesting, but what do Sedgewick and Wayne have to do with any of this? Your first quote is from the post's author (Steven Rosenberg says the site he

All very interesting, but what do Sedgewick and Wayne have to do with any of this? Your first quote is from the post's author (Steven Rosenberg says the site header), and the second quote is from the authors of How To Design Programs (Felleisen, Findler, Flatt, Krishnamurthi).