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Hadoop Tutorials
Engineering Walkthroughs

Book Recommendations
Open Source Code

Articles

A Quick Guide to Concurrency in Scala: 2017-03-28 in Scala
4 Fun and Useful Things to Know about Scala's apply() functions: 2017-03-06 in Scala
10+ Great Books and Resources for Learning and Perfecting Scala: 2017-02-14 in Scala

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Community

Big Data Madison: Data infrastructure meetup group I run in coordination with Pitt Fagan
Building and improving products with Hadoop: Hadoop Summit, San Jose CA, June 2013
Integrating batch processing into your app: Madison Ruby, Madison WI, August 2012

Projects

Assored Github projects: Mostly libraries and example code for Hadoop.
Simple Check-In for Foursquare: Check in on Foursquare in 5 seconds.
Wi-Fi Check-in for Foursquare: Automatically check-in to Foursquare when you connect to wi-fi.