Posts tagged with en

Test driven development of concurrent programs in Kotlin at KKon 2022

Concurrent and asynchronous applications can be written in Kotlin with coroutines in a precise and structured way. Unfortunately, concurrency often increases the complexity and it is difficult to create bug-free and maintainable programs.

In my talk “Korrekte nebenläufige Anwendungen mit Koroutinen und TDD” at the KKon 2022 I show that test-driven development (TDD) is a solution.

Test driven development of concurrent programs in Kotlin at KKon 2022

I will talk about “Korrekte nebenläufige Anwendungen mit Koroutinen und TDD” (“Correct concurrent applications with coroutines and TDD”) at the KKon 2022.

Slides of my talk about coroutines in Kotlin at KKon 2021 Warmup

In my talk “Nebenläufigkeit mit Koroutinen strukturieren” at the KKon 2021 Warmup i explained how to structure and organize concurrent programs with coroutines in Kotlin.

Talk about coroutines in Kotlin at KKon 2021 Warmup

I will talk about “Nebenläufigkeit mit Koroutinen strukturieren” (“structuring concurrency with coroutines”) at the KKon 2021 Warmup.

Update of my website to Bootstrap 5

I updated my website so that it looks new and shiny and provides faster and easier access.

Migrating a ray tracer from Java and Groovy to Kotlin (part 3)

I continued to work on migrating my ray tracer to Kotlin. Now the scenes can be specified with a Kotlin DSL and all Groovy code is gone.

Migrating a ray tracer from Java and Groovy to Kotlin (part 2)

I continued to work on migrating my ray tracer to Kotlin.

Migrating a ray tracer from Java and Groovy to Kotlin (part 1)

After reading the wonderful book Kotlin in Action I started to migrate my ray tracer from Java and Groovy to Kotlin.

EuroClojure 2017 in Berlin

In my first project for ThoughtWorks the backend is written in Clojure. Since the project was in Berlin, I visited the EuroClojure 2017 which takes place in Berlin this year, too.

Working for ThoughtWorks

After long considerations i decided to quit being a freelancer and joined ThoughtWorks in Hamburg, Germany.

CUDA 8.0 on Mac OS/X

CUDA 8.0 on Mac OS X 10.12 gave me the following error:

Updated library of geometric algorithms

Today I released an updated version of the library of geometric algorithms.

Using a __device__ lambda in CUDA 8.0

In CUDA 8.0 C++ 11 lambdas can be used on the device. See the following code.

Covariance and Contravariance in Scala

I explain "covariance and contravariance" with some simple Scala examples.

Heat diffusion on multiple GPUs

The implementation of the heat diffusion equation on multiple GPUs is explained in the talk (in german).

Measuring traffic on the PCI Express Bus (PCIe)

During my talk at the parallel 2015 conference i was asked how one can measure traffic on the PCI express bus. For multi GPU computing it is very important to control the amount of data exchanged on the PCIe bus.

Trying out next-gen JavaScript now with ECMAScript 6

With Babel you can test many features of the upcoming next version of JavaScript called ECMAScript 6 now.

Examples for parallelism: ray tracer on the GPU

I tested the parallel ray tracer on all NVIDIA cards i bought. This page contains the results.

Examples for parallelism: ray tracer

I wanted to learn some frameworks for parallel computing and i decided to implement a simple ray tracer as a "visual benchmark".

CUDA Real-Time Ray Tracer

During the christmas holidays i rewrote my ray tracer for the NVIDIA CUDA architecture.

Compiling OpenCL programs on Mac OS X Snow Leopard

I installed Snow Leopard on my laptop yesterday. I was very curious about OpenCL and installed the drivers and the GPU Computing SDK from NVIDIA.

Parallelization with Haskell - Easy as can be

The functional programming language Haskell provides a very easy way of parallelization.

Little big planet and computer graphics

I am fascinated by the possibilities of modern computer graphics. It all began while playing the game Little Big Planet. It does not look like a computer game. It looks like the results of handicraft work with scissors, glue, paper, drapery, etc.

New version of the library of geometric algorithms in Haskell

Almost 10 years after the initial release, i released an updated version of the library of geometric algorithms in Haskell. It now builds with Cabal and requires the Glasgow Haskell Compiler.

Remark: This post was adapted to the new blog format in November 2016.

Dynamic Languages Shootout / OOP 2008

The german magazine JavaSpektrum organized the "Dynamic Languages Shootout" contest for the OOP 2008 conference. The challenge was to create a computer game similiar to Scrabble in a dynamically typed programming language.

Accessing EMF models with JRuby

JRuby provides access to Java packages, so it is possible to use packages created with the Eclipse Modeling Framework (EMF).

Using UML2 with Groovy

The UML2 project provides an EMF based implementation of the UML 2.x metamodel in Java. With the EMFBuilder it is possible to create and process UML2 models.

Higher order Markov chains in Ruby - Ruby Quiz #74

Here’s my second solution for the quiz No 74. It generates text with a first or higher order Markov chains. See also the first order version.

Markov chains in Ruby - Ruby Quiz #74

Here’s my solution for the quiz No 74. It generates text with a first order Markov chain.