Acknowlegement

I had a few chances to write a book in the past, but when Packt called me shortly before my 50th birthday, I agreed almost immediately. Scala? Machine learning? Big data? What could be a worse combination of poorly understood and intensely marketed topics? What followed was eight months of sleep deprived existence, putting my ideas on paper—computer keyboard, actually—during which I was able to experimentally find out that my body needs at least three hours of sleep each night and a larger break once in a while. As a whole, the experience was totally worth it. I really appreciate the help of everyone around me, first of all of my family, who had to deal with a lot of sleepless nights and my temporary lack of attention.

I would like ...

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