July 11, 2013 by chris on Tidbits

RT @parksfernandez: Nothing feels more spiritually…

RT @ParksFernandez: Nothing feels more spiritually cleansing than brushing your teeth in the middle of the day.

July 2, 2013 by chris on Tidbits

RT @brittneyg: Open the door for someone, get your…

RT @brittneyg: Open the door for someone, get your hand smashed in it. <- lately I’m the one smashing my own hand with the door.

June 29, 2013 by chris on Tidbits

RT @Greg_Mann: You know you are a drag racing fan when you hear start of #VanHalen song Hot for Teacher & think of a nasty big block idle

June 28, 2013 by chris on Tidbits

This kind of blows my mind! bbc.co.uk/news/health-23… #playinggod or #science ? Full of ethical questions and a miracle at the same time.

June 27, 2013 by chris on Tidbits

From @jdowdell: A four story image of a waterfall petapixel.com/2013/06/27/how… Lovely execution of a nice project.

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