Recent IRB versions include a multi-line autocomplete which may be helpful to novice users but can be distracting.
It might sometimes be useful to check whether your Rails application accesses the file system unnecessarily, for example if your...
Testing file download links in an end-to-end test can be painful, especially with Selenium. The attached download_helpers.rb provides...
While verifying doubles in RSpec is a good default, it is limited in the amount of methods it actually is...
I recently had the problem that embedded code boxes crashed my layout. It turned out that pres break out of...
tl;dr With ES2021 you now can use str.replaceAll(), Promise.any(), logical assignment operators, numeric separators and WeakRef on all major...
Code quality can be measured in four levels: (Working code) Reliable code (minimum) Readable code (ok for short-lived code...
You'll need openssl-3 or newer for servers running 22.04 Ruby version 3.1 uses by default the gem openssl...
When you are working with SVG files and ImageMagick you can get different results on different machines depending on which...
There is a way to use multiple databases in Rails. You may have asked yourself how you're able to...
tl;dr You can use attribute? as shorthanded version of attribute.present?, except for numeric attributes and associations. Technical Details
The gemspec for gems allows to add metadata to your gem, some of which have a special meaning and are...
You can use Unpoly's up.on with a named listener function and immediately unbind this event listener with { once: true...
In Chrome DevTools you can use getEventListeners(object) to get a list of registered event listeners on the specified object...
When you need information about a gem (like version(s) or install path(s)), you can use the gem binary...
ruby-warning adds custom processing for warnings, including the ability to ignore specific warning messages, ignore warnings in specific files/directories...
Due to the way we setup Jasmine tests in our projects, you may run into various errors when Jasmine boots...
This card explains how to generate an entity relationship diagram for your Rails application. We also show how to limit...
Redis.current will be removed without replacement in redis-rb 5.0. Version 4.6.0 adds deprecation warnings for Redis.current and Redis.current=: `Redis.current...
While we are used to run our JavaScript tests on a test page within our Browser, it's also possible...
I recently was in a weird situation where my (Jest/CLI) tests were referencing a function that was no longer part...
RSpec's let allows you to super into "outside" definitions, in parent contexts. Example: describe '#save' do subject { described_class.new(attributes...
To ensure a consistent code style for JavaScript code, we use ESLint. The workflow is similar to integrating rubocop...
This are the steps I needed to do to add esbuild to an application that used the vanilla rails asset...