Because implementing your system and running experiments with it can happen concurrently, it is important to keep track of which version of your code you use...
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After struggling with sharing Maven artifacts for longer than I want to admit, I finally set up a dedicated artifact repository for Opencraft.
Failing hard drives and general system unavailablity every other week made me migrate more than 30 software repositories to a managed service.
This week I had a lot of fun teaching the basics of cloud computing at restart.network, a start-up company that offers computer-science bootcamps to refugees...