Author Archives: Felix Leipold

New jproc Release

I have just released version 2.2.0 of jproc, a handy library to run external programs from Java. It is nice to use a serious programming language (whichever JVM language you consider serious) rather than just bash, if things get a … Continue reading

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Wrapping Exceptions with Context

A good error / exception message should provide enough information to pinpoint a problem. In most modern languages there is a stack trace feature that will show how the program got to the point where it broke. Unfortunately this information … Continue reading

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Shades of Green – The Release Candidate Report

On our current project we practise continuous integration and we perform weekly releases. To simplify the decision whether a particular build is fit for production we introduced a release candidate report that contains all the information that we usually take … Continue reading

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Dealing with Flaky Tests using Data

I recently wrote a sbt plugin that produces tabular test reports. My motivation was to get better insights into the reliability of our test suite. Due to good discipline most failures that occur are caused by flakiness of tests that … Continue reading

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Managing Configuration

The Problem In almost every serious software development effort that entails integrating different systems multiple environments are being used throughout development, testing and the production use of the system. Each of these environments typically contains a number of systems, that … Continue reading

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Go Defrustrator

At programmiersportgruppe I blogged about the go-defrustrator, a userscript that dynamically improves Go’s user interface.

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Sad Truth

This Saturday I made a rather chilling discovery. Most people in my generation know the ingenious prankster Emil i Lönnerberga. And – as the wikipedia article states – we were lead to believe that he grew up to be a … Continue reading

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Strategie

Unablässiges Gerede von Strategien ist das Markenzeichen des schlechten Taktierers.

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Readability vs Runtime Feedback

In my scala explorations I also came across the problem of testing and verifying mocks. In scala it is trivial to pass around predicates, however these are function objects, that can be applied, but don’t know much about their implementation. … Continue reading

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Scala Compiler Quirks

Recently I have been dabbling with scala a bit. As it happens I found a few quirks in the compiler. So does the following bit of code compiler and, if so, what does it print? object Example { val x … Continue reading

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