November 16, 2012 by chris on Tidbits

Nice to see the Hall 501 truck in the lead in the…

Nice to see the Hall 501 truck in the lead in the last climb over the peninsula heading into La Paz, they were 10 mins back #Baja1000

September 17, 2012 by Chris on Tidbits

Ode To Redheads http://t.co/Ca…

July 19, 2012 by Chris on Tidbits

Where do you fall on the continuum of Ask vs Guess culture? http://t.co/sgYD98O3

July 3, 2012 by Chris on Tidbits

Weeeee landing in #Reno is always a combination of fun and terrifying, this time more of the latter.

July 1, 2012 by Chris on Tidbits

Color, reproduciton and perception: http://t.co/qIQQEjZp with fantastic discussion on HN: http://t.co/LFgfd6Ri

These are my links for July 20th through July 24th:

Ask HN: Best-architected open-source business applications worth studying? | Hacker News -
Monospaced Programming Fonts with Ligatures | Hacker News -
The language of choice - Propositional logic was discovered by Stoics around 300 B.C., only to be abandoned in later antiquity and rebuilt in the 19th century by George Boole’s successors. One of them, Charles Peirce, saw its significance for what we now call logic circuits, yet that discovery too was forgotten until the 1930s. In the ’50s John McCarthy invented conditional expressions, casting the logic into the form we’ll study here; then in 1986 Randal Bryant repeated one of McCarthy’s constructions with a crucial tweak that made his report “for many years the most cited paper in all of computer science, because it revolutionized the data structures used to represent Boolean functions” (Knuth).1 Let’s explore and code up some of this heritage of millennia, and bring it to bear on a suitable challenge: playing tic-tac-toe.
Then we’ll tackle a task that’s a little more practical: verifying a carry-lookahead adder circuit. Supposedly logic gets used all the time for all kinds of serious work, but for such you’ll have to consult the serious authors; what I can say myself, from working out the code to follow, is that the subject offers a fun playground plus the most primitive form of the pun between meaning and mechanism.

You’re encouraged to read with this article’s code cloned and ready