Emanuel Jöbstl

If you host customer-facing services on ECS behind a load balancer, you might want to have zero downtime when deploying a new version of your software. Assuming the application itself is stateless (e.g. all state is stored somewhere else, for example…

A stack trace is one of the most fundamental tools when debugging code, since it will reliably tell us where an error happened. The concept of stack traces originates from synchronous code. Error: Oh no a database error! at getStuffFromDatabase…

@Graphcool is GraphQL database service that provides a typed API. In contrast to SQL, GraphQL is somewhat less powerful, but has a huge advantage: Querying nested data becomes very convenient. Combined with the built-in permission system, it is a…

After the recent upgrade to macOS High Sierra, UTF-8 icons displayed incorrectly when using SSH. Particularly the powerline of oh-my-fish was broken. The solution to this dilemma was simply to set the locale correctly. export LC_CTYPE=en_US.UTF-8…

With iOS10 and Swift 3, Apple removed ALAsset and replaced it with the Photos library. While the concepts of the new Photos library are great, the documentation is not very clear on how to write custom metadata to the image. The fact that UIImage…

Having a proper shell when working on a Unix environment is a must, especially as a software developer. That’s the reason great shells like fish or zsh exist: They simplify a lot of tasks and also make working from the terminal pleasant.When…

This article complies to NetLab Version 1.9 and above. Download the .XNL file here. A question which arises relatively often is how to emulate WAN networks with eEx NetLab, so I decided to write a little article about it. During the early stages of…

Sometimes there are problems in the world of programming, which are not always easy to solve. One of them is the calculation of the intersection area of a circle and a rectangle. There are many known solutions for this problem, some of them are…