Rails credentials are a way to store secrets in an encrypted YAML file. Usage is simple: each key in the...
Whenever you have to deal with randomness in a jasmine test there are some spy strategies to help you out...
It's possible to implement simple custom RuboCop cops with very little code. They work exactly the same like existing...
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...
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...
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...
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...
Debouncing a method call delays its execution until after a specified time has passed. If it's called again before...
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...
This card is a short summary on different ways of assigning multiple attributes to an instance of a class.
Using Capistrano, we usually have some array configurations in the config/deploy.rb file, like set :linked_files, %w[config/database.yml], so in...
ActiveModel classes have a class method .human_attribute_name. This returns a human-readable form of the attribute: Person.human_attribute...
I used two lab days to read the The framework field guide - Fundamentals, the first of a three part series...
When you mocked method calls in RSpec, they are mocked until the end of a spec, or until you explicitly...
In Rails 7.1 it has become possible to annotate partials with the locals they expect: # partial _user_name.erb <%# locals: (user:) %>