October 22, 2014 by chris on Tidbits

Maybe not terrifying but pretty cool to watch: A R…

Maybe not terrifying but pretty cool to watch: A Remote Area In Greenland. What They Captured Is Truly Terrifying. ow.ly/D8IK3

October 21, 2014 by chris on Tidbits

This Is What Developing Acute Schizophrenia Feels…

This Is What Developing Acute Schizophrenia Feels Like ow.ly/D88eO #mentalhealth #schizophrenia

October 21, 2014 by chris on Tidbits

Kid’s breakfasts around the world: nytimes.com/interactive/20… #yum

October 14, 2014 by chris on Tidbits

Happy African Grey story of the day: Parrot disappears for four years, returns speaking Spanish. bit.ly/1tXI0SA via @kathrynschulz

September 19, 2014 by chris on Tidbits

Sharing the @trello love. Congrats on 5m users, such a great tool! #trello5m bit.ly/1qgOp9c

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