In this impressive document, Prof Astrachan also shows that he has an infinite patience. He explains (with great analogies) a huge pile of concepts along the wa

In this impressive document, Prof Astrachan also shows that he has an infinite patience. He explains (with great analogies) a huge pile of concepts along the way, which wouldn't be necessary for a technical audience. The points 13-16 explain in 400 words that even if public static int abs(int i) { return i >= 0 ? i : -i; } and public static int abs(int a) { return (a < 0) ? -a : a; } look similar, they are as different as two different implementations of Math.abs can be. Someone that has never seen a line of code could wonder how come they both use the words public, static, etc.