Meissner bodies are fascinating. Wikipedia has a little on them, but there's some more detail on MathOverflow.
The image is Copyright Christof Weber 2009, who wrote an excellent paper about them and has set up an interactive java demo.
You can also buy your own set to play with.
If you play wow on intel integrated graphics and you've been freezing on the last boss in hour of twilight, this thread contains the answer.
pathod seems like it'd be useful for testing any code that consumes a service over http [via torrez]
12 factor app says a lot of good things that i agree with, but the server-process model rule is odd. there doesn't seem to be an obvious reason why the php/apache/processes model is wrong, but it's not allowed. uh?
This is the personal website of Cal Henderson, Slack co-founder & CTO.
I give occasional talks, write code and sometimes articles.
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