By Jonathan Juursema (Own work) [CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons
A 3D printer can do more than just create fun objects. They can be programmed to solve every day problems.
Check your at_exit callbacks.
If ruby is segmentation faulting on Travis CI, try updating libxml
Last week we held or first, hopefully of many, hardware hacking event dubbed Tuesday Tinkering.
In 3 easy steps you can setup a rails app on Heroku that can easily handle 200 requests per second and 100 concurrent connections, for free.