An end-to-end test (E2E test) is a script that remote-controls a web browser with tools like Selenium...
Slides for Henning's talk on Sep 21st 2017. Understanding sync vs. async control flow Talking to synchronous (or "blocking...
If you are using PDFKit / wkhtmltopdf, you might as well want to use custom fonts in your stylesheets. Usually this...
Let's say you have a folder images and want to to move all files in there to a new...
On my Ubuntu MATE machine, switching applications with ALT + TAB was impossible, because it took nearly 2 seconds. The culprit...
I frequently find myself needing a combination of group_by, count and sort for quick statistics. Here's a method...
If you want to ssh into your vagrant box without switching into the project directory and typing vagrant ssh, you...
You can use local copies of gems in your Gemfile like this: gem 'spreewald', path: '~/gems/spreewald' As soon as you...
You can configure a Ubuntu system as a gateway in order to share it's internet connection (maybe via WLAN...
Luckily, this is simple. Just install three packages: sudo apt install ipheth-utils libimobiledevice-dev libimobiledevice-utils
When you load a dump for development, records may reference images that are not available on your machine.
Using VCR to record communication with remote APIs is a great way to stub requests in tests. However, you may...
Line-height and vertical-align are simple CSS properties. So simple that most of us are convinced to fully understand...
Web technology is a broad field and you cannot be an expert in all aspects. However, it is useful to...
We generally use multiple application servers (at least two) and you have to search on all of them if you...
We have projects that have been developed using many different versions of Ruby. Since we do not want to...
A comprehensive introduction to sending HTML emails. Intro: HTML email: Two words that, when combined, brings tears to a developer...
Exercise 1: XML On the start page of your Movie DB, show the title of a random movie that is...
So you're getting this failure when running bundle install on an older project: Your Gemfile.lock is corrupt. The following...
TL;DR Debugging problems with javascript errors in cucumber tests is sometimes easier in the browser. Run the test, stop...
In order to have monitoring for Sidekiq (like queue sizes, last run of Sidekiq) your application should have a monitoring...
Improve geordi cucumber: Only attempt @solo run when the specified files contain the @solo tag, skip @solo run if any...
Sometimes you might need to nest a git-project inside another git-project. The right strategy is to use submodules...
Things to check first Do you deliver fonts in a format that the target IE version understands? Did you double...