It's possible to implement simple custom RuboCop cops with very little code. They work exactly the same like existing...
You are given two CSS selectors that you do not control. How can you build a new selector that matches...
Reacting on a class getting added can be done with a mutation observer. Example: const items = document.querySelectorAll('.item') const expectedClass...
The Visual Viewport API enables developers to access the actually visible area of the page. This differs from the normal...
sudo gitlab-rails console Note This takes some minutes to start Send a mail Use the following...
There are different kind of memory measurement metrics in Linux. These are the differences: Code Name Description vsz virtual memory...
Sometimes you want to write a test for a business rule that's based on multiple variables. In your goal...
Sometimes we have to write code that behaves differently based on the version of a specific gem or the Ruby...
I recently stumbled over a quirk in the way Ruby handles local variables that I find somewhat dangerous. Consider:
tl;dr To adjust code templates in RubyMine, navigate to Settings -> Editor -> File and Code Templates. Example You can navigate...
I was recently asked to optimize the response time of a notoriously slow JSON API endpoint that was backed by...
While most Rails Apps are tied to at least one external REST API, machine-to-machine communication via GraphQL is...
Add apt source: apt update -y && apt install -y gpg sudo wget curl sudo install -dm 755 /etc/apt/keyrings
When Rails releases a new version of their gems, they also release a number of npm packages like @rails/activestorage or...
Modern JavaScript includes Intl.NumberFormat to format numbers in different formats and locales. In this card, we describe a wrapper for...
For a long time virtualenv was used to create isolated Python environments. This is not required anymore. Since Python 3.3...
This card shows an uncommon way to retrieve a file using selenium where JavaScript is used to return a binary...
Some rubygems come in platform-specific versions (i.e. "x86_64-linux") in addition to the usual "ruby" platform. This is...
If you want someone to be able to access your rails console, but don't want them to be able...
Debouncing a method call delays its execution until after a specified time has passed. If it's called again before...
Running gem update --system will install the latest version of RubyGems. However the latest version might not be compatible with...
You might know a few examples, where you configure some library via a block. One example is the Rails configuration...
This cards describes an example with a Github Client on how to keep your Rails application more maintainable by extracting...
Fresh Chrome installations now show a "Choose your search engine" popup in Europe. This might make your Cucumber tests fail...