About the Author

Saleem Ansari is a full-stack developer with over 8 years of industry experience. He has a special interest in machine learning and information retrieval. Having implemented data ingestion and a processing pipeline in Core Java and Ruby separately, he knows the challenges faced by huge data sets in such systems. He has worked for companies such as Red Hat, Impetus Technologies, Belzabar Software, and Exzeo Software. He is also a passionate member of free and open source software (FOSS) community. He started his journey with FOSS in the year 2004. The very next year, he formed JMILUG—Linux Users Group at Jamia Millia Islamia University, New Delhi. Since then, he has been contributing to FOSS by organizing community activities and contributing code to various projects (for more information, visit http://github.com/tuxdna). He also mentors students about FOSS and its benefits.

In 2015, he reviewed two books related to Apache Mahout, namely Learning Apache Mahout and Apache Mahout Essentials; both the books were produced by Packt Publishing.

He blogs at http://tuxdna.in/ and can be reached at via e-mail.

I dedicate this book to my parents.

I would like to acknowledge the amazing people who have helped me push forward while writing this book. First off, I would like to thank Vinay Argekar and Zeeyan Pinheiro from Packt Publishing, who have been of immense help and guidance right from the beginning of this book. I would like to especially thank the reviewers, Eric Le Goff and Andrii Kravets. I wouldn't have leveled up the content if I had not received their critical reviews and suggestions. So much kudos to you guys! I would like to give another special mention to Pat Ferrel from the Apache Mahout and PredictionIO project. He helped me understand the unified recommender algorithm that is mentioned in the book.

All the appreciations are due to my family and friends, who have been supportive while I was writing this book.

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