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Upgrading a Rails application incrementally By Luke Francl (look@recursion.org), January 2018 One of the major projects I led at my last Rails gig was upgrading our application from Rails 3.2 to Rails 4.2. I'd like to share some lessons I learned about upgrading a large Rails application with minimal problems. Some operational issues I'll discuss are specific to the Rails 3.2 to 4.2 upgrade, but m
Build a query parser Why and how, with a tutorial using Ruby, Parslet, and Elasticsearch By Luke Francl (look@recursion.org), June 2017 More than a few times in my career, I've been part of a project that needed search. A Lucene-based search engine fits the bill. Somebody1 finds the search engine's built-in query parser, wires it up, and that is that. It seems like a good idea and it's easy. Howev
By Luke Francl (look@recursion.org), August 2011 d3.js is a data visualization library by Mike Bostock, who is also the primary creator of Protovis, which D3 is designed to replace. D3 has a steep learning curve, especially if (like me) you are not used to the pixel-precision of graphics programming. To build a visualization with D3, you need to understand JavaScript objects, functions, and the me
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