The last few weeks, I was focused on algorithms and data structures. I have been working my way through “Cracking The Coding Interview” and created a PHP library based on this book. I splitted interesting topics, such as dependency resolving using topological sorting, out into separate projects and released them under the MIT lincese on … read more …
In past projects at my former employer, I had to deal with a lot of historical grown (duplicated) code and databases. Some source code files contained of nearly 2,000 lines of code and contained a lot of duplicated stuff. The databases were in a similar situation. Much worse in this scenario was the violation of … read more …
The last few days I had a little bit more time to dive into theory. I was wondering how to effectively search single values in unsorted, large amounts of data (e.g. files larger than 1GB). There are two key problems in such an issue: the data is unsorted, meaning that you can not search in … read more …
Earlier this year, I announced my Master’s Thesis in Recommendation Systems and Nextcloud, an open source file sync and share software. Since then, things have changed a little bit. RecommendationAssistant was designed to work with two recommendation techniques: Collaborative Filtering and Content-Based Recommendation. Unfortunately, the second technique worked not as good as expected. Office files, … read more …
For a project I was involved in at short notice, I had to become familiar with the Kotlin programming language. Before starting to code, I wanted to get familiar with the syntax and the language itself. As writing on a paper is the best way to learn (for me), I created the following Cheat sheet. Enjoy! … read more …
Didapptic.com is a research based web application that measures Android and iOS Apps from a didactic point of view. Actually, we work on a new release in order to provide a fresh layout and smarter handling of app data. Among other things, the new release introduces also a new user management handling which allows and/or permits … read more …
Yesterday, I was working on PHPAlgorithms (again). When trying to implement Graphs (Directed and Undirected), I found out that a node could not be found in the graph although I was sure it was there. After a lot of debugging and reverse engineering, I found out that: the adjacency list, which contains all adjacent nodes … read more …
Frankfurt, May 2018 – Today, the first BETA version of PHPAlgorithms is launched! The repository is available via GitHub and Packagist. Originally launched as a research project, PHPAlgorithms provides currently a basic set of data structures. The repository has been designed to provide simple usage of common data structures such as lists, maps and trees. … read more …
This is a great day. Over the last approximately 7 months I have worked hard on my Master’s Thesis. The goal was to contribute to the community by creating an open source app for an open source platform. And thus, I started to work on a Recommender App at the company behind Nextcloud, an open … read more …
A few days ago I have started working on a PHP library for algorithms and data structures. PHPAlgorithms is still in progress and thus has a early beta status. But today, I have pushed the first data structure which is nearly full implemented: HashMaps. A HashMap is characterized among others by its key-value storage property. … read more …