Scala Exchange 2015

It was possible to arrange a visit of Scala Exchange 2015 in London, short #ScalaX. I visited the following events: day 1: Keynote: Scaling Intelligence: moving ideas forward by Jessica Kerr Functional Patterns for FP beginners by Clément Delafargue Introduction to Apache Spark by Deenar Toraskar Keynote: Without Resilience, Nothing Else Matters by Jonas Bonér …

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What do +, – and * with Integer do?

When using integers in C, Java or Scala, we often use what is called int. It is presented to us as the default. And it is extremely fast. Ruby uses by default arbitrary length integers. But what do +, – and * mean? We can rebuild them, in Ruby, kind of artificially restrict the integers …

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Devoxx 2015

This year I have had the pleasure to visit the Devoxx-Conference in Antwerp in Belgium. I have visited the following talks: Day 1: Opening Keynote Session about Java 9 modules Keynote Session about the beginning of the Universe Asynchronous programming in Java 8: how to use CompletableFuture by José Paumard Ignite Sessions I JRuby 9000 …

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Using Collections

When Java came out about 20 years, it was great to have a decent and quite extensive collection library available as part of the standard setup and ready to use. Before that we often had to develop our own or find one of many interesting collection libraries and when writing and using APIs it was …

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Residue Class Rounding

Deutsch If you do not know what residue classes are, just read on, it will be explained to the extent needed later on. The concept of rounding seems familiar, but let us try to grab it a little bit more systematically. Let us assume a set of numbers and a subset of it, whose elements …

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Scala Exchange 2014

Deutsch I have been visiting the conference Scala eXchange ( #scalaX ) organized by Skillsmatter in London. Here is some information about the talks that I have attended and the highlights: The Binary Compatibility Challenge Martin Odersky Examples can be constructed for each of the four combinations of binary and source code compatibility. We wish …

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Devoxx 2014 in Belgium

Deutsch 2013 2012 In 2014 I have visited the Devoxx conference in Antwerp in Belgium. Here are some notes about it: What is Devoxx? Devoxx ist a conference organized by the Belgian Java User Group. Belgium is trilingual (French, Flemish and German), but the conference is 100% in English. The location is a huge cinema …

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