How to get the current working directory in Kotlin
Sometimes it’s nice to know where you are. import java.nio.file.Paths fun main() { val cwd = Paths.get(“”).toAbsolutePath() println(cwd.toString()) }
Reading files with Kotlin
Before Kotlin BufferedReader br = new BufferedReader(new FileReader(“data.txt”)); try { StringBuilder sb = new StringBuilder(); String line = br.readLine(); while (line != null) { sb.append(line); sb.append(System.lineSeparator()); line = br.readLine(); } String content = sb.toString(); } finally { br.close(); } This is a code sample reading a files content in plain old Java. What a mess…
How to store sensible data in a .env file
Motivation Whether you need credentials to log into a system or some configuration parameters for your application, the .env concept might help you. Installation pip install python-dotenv Usage .env file Create an .env file in your project root folder You should not share this file or commit/push it to your version control. You should add…
How to write unit tests in Kotlin
Dependency First you need to add the following dependency to your build.gradle file dependencies { testImplementation ‘org.jetbrains.kotlin:kotlin-test’ As a second step you need to add the task test { useJUnitPlatform() } Implementation When you are familiar with JUnit you may recognized the @Test annotation. Assertions work pretty much the same. You can choose from a…
Coding Challenges to learn a new language fast
Motivation Learning a programming language can be challenging. Although there are tons of articles and tutorials for learning languages the most important thing is to transfer your knowledge to other real world problems. The challenges The coding challenges are language agnostic so you can use any modern language which supports writing command line applications. Write…
Wie baue ich eine entwicklungsbegleitende Software-Qualitätssicherung auf?
Aufbau einer entwicklungs-begleitenden Software-Qualitätssicherung In meiner Zeit als Software-Entwickler bei mgm technology partners und der e.solutions GmbH durfte ich zweimal eine entwicklungsbegleitende Qualitätssicherung aufbauen. Bei mgm technology partners konnten wir im ERiC (Elster Rich Client) die Neufehlerrate pro Release um 90% senken. Bei e.solutions begleiteten wir das Audi Virtual Cockpit in die drei ersten SOPs…
Kotlin Tutorial
This is the overview page for my little Kotlin tutorial Learning Kotlin Part 1 – print Learning Kotlin Part 2 – arrays Learning Kotlin Part 3 – ranges Learning Kotlin Part 4 – conditionals Learning Kotlin Part 5 – loops Learning Kotlin Part 6 – functions Learning Kotlin Part 7 – multiple return values Reading…
How to implement Python Decorators – Part 2
When you’ve finished reading How to implement Python Decorators you might wonder if it is possible to hand over some parameters to the decorator function. And yes that is possible and can come in quite handy. For a Flask project I wrote a decorator to manage authorization of endpoints. I wanted to grant access to…
How to use Greasemonkey to make your life easier
Motivation Sometimes you encounter websites which seem to have time traveled from 1999. No responsive UI, no widgets, just plain html input fields and selects. Time to improve these sites 🙂 Greasemonkey overview Greasemonkey is a browser plugin which lets you inject client-side JavaScript into the webpage just as the developer could have intended to…
How to use glob in Python
Motivation Sometimes you need to find files across multiple directories and / or directory hierarchies according to certain pattern. E.g. find all image files with the jpg extension You can use it to find files in a directory by using wildcard semantics. Let’s say we have a directory structure like this: glob_test/ |– dir_a/ |–…