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Clojure: Reading and writing a reasonably sized file

In a post a couple of days ago I described some code I’d written in R to find out all the features with zero variance in the Kaggle Digit Recognizer data set and yesterday I started ...
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MapReduce Algorithms – Secondary Sorting

We continue with our series on implementing MapReduce algorithms found in Data-Intensive Text Processing with MapReduce book. Other posts in this series:Working Through Data-Intensive ...
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Hibernate Search 4.2 final released: spatial query supported

JBoss has announced the release of Hibernate Search 4.2 final. You may download it from Sourceforge or use the Maven artifacts. In the new release, some interesting features are included:Hibernate ...
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Garbage Collection Analysis of PCGen

Introduction I decided to combine two software loves of mine and perform some analysis on PCGen, a popular Java based open source character generator for role-playing games. I used ...
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How many threads do I need?

It depends on your application. But for those who wish to have some insight about how to squeeze out most from all those expensive cores you have purchased for your production site ...
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Dev vs QA, should there really be a distinction?

We had our scrum of scrum meetings last Wednesday where all scrum masters meet up with our line manager to discuss issues, bottlenecks and success stories of our previous sprint. One ...
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QOTD: Java Thread vs. Java Heap Space

The following question is quite common and is related to OutOfMemoryError: unable to create new native thread problems during the JVM thread creation process and the JVM thread capacity. ...
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@Cacheable overhead in Spring

Spring 3.1 introduced great caching abstraction layer. Finally we can abandon all home-grown aspects, decorators and code polluting our business logic related to caching.                   Since ...
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The Sprinting Centipede Strategy: How to Improve Software Without Breaking It

Our code has been broken for weeks. Compiler errors, failing tests, incorrect behavior plagued our team. Why? Because we have been struck by a Blind Frog Leap. By doing multiple concurrent ...
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Android: Loaders versus AsyncTask

One of the biggest pieces of Android that I have neglected to learn about would be Loaders. Seeing as it’s time for me to learn it, perhaps I can help you out a bit with it as ...
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