Wir wollen verstehen, welche Hardware-Ressourcen uns zur Verfügung stehen und wie wir mögliche Engpässe und Probleme identifizieren können. Grundsätzlich...
AWS ist der meist genutzte Cloud Provider. Bei AWS gibt es extrem viele Themengebiete und es ist nicht möglich sich...
Bei makandra entwickeln wir seit 2009 Web-basierte Anwendungen und haben im Trainee-Programm für unsere Web-Entwickler vieles aufgeschrieben...
makandra bietet ein bezahltes Trainee-Programm für DevOps / Cloud-Engineers: http://start.makandra.de Wir arbeiten für unsere Kunden häufig als Infrastruktur...
In SQL, NULL represents an "unknown" value. Because of this, it does not behave like a standard piece of data...
Building application assets with esbuild is the new way to do it, and it's great, especially in combination with...
When using where.not with a Hash of multiple attributes, Rails applies logical NAND (NOT (A AND B)). This contrasts with...
TL;DR When using Cache-Control on a Rails application, make sure the Vary: Accept header is set.
Within development and test environments, Rails is usually configured to show a detailed debug page instead of 404s. However, there...
You can configure VCR to automatically record/replay cassettes for any RSpec example tagged as :vcr or vcr: true.
The gem better_errors offers a detailed error page with an interactive REPL for better debugging. I had the issue...
It seems like changing the HTTP_ACCEPT_LANGUAGE is not possible for a headless chrome. On Ubuntu the headless Chrome...
The Node Version Manager allows installing multiple NodeJS versions and switching between them. By default, it does not automatically switch...
When giving a presentation where you do some coding, the font size you usually use is probably a bit too...
When testing JavaScript functionality in Selenium (E2E), you may need to access a class or function inside of a evaluate...
When you need to know how a BIOS screen in a Lenovo Laptop works without actually booting into the BIOS...
There are several tools for DNS debugging which offer you more or less information. Most of the time the more...
In Ruby you can communicate between processes with sockets. This might be helpful in tests that validate parallel executions or...
Ruby offers monkey patching methods in order to change the behavior of a library if there's no better way...
In long diffs, it can become impossible to spot small changes in larger blocks of moved code. This may be...
Why improve your code reviews? Improving code review technique helps your reviewer, your team, and, most importantly: you.
If you have installed Rubocop in your project, RubyMine can show you Rubocop violations immediately in your editor. You probably...
Sometimes you want to find the inverse of an ActiveRecord scope. Depending on what you want to achieve, this is...
Ubuntu 18.04 uses systemd to manage services. There are basically two commands for listing all services and manipulating the state...