For my computer science bachelor's thesis I programmed and evaluated a CLI Test Case Prioritization (TCP) tool for makandra...
Rails' url_for is useful for generating routes from a Hash, but can lead to an open redirect vulnerability.
When you write your next CarrierWave uploader, consider processing your images with libvips instead of ImageMagick. Reasons for libvips
When RubyMine reports Rubocop returning "exit code -1", upgrading Rubocop can be the fix: gem install rubocop "The logs" can...
alias_method makes a copy of a method. This works fine until the same method is overridden using prepend. If...
It most cases it's not necessary to add a version constraint next to your gems in the Gemfile. Since...
With this Ruby script you can print all values in a Redis database to your console (derived from this bash...
tl;dr asdf allows you to manage multiple runtime versions with a single CLI tool and is backwards compatible by...
In Ruby on Rails ActiveRecord::Relation#merge overwrites existing conditions on the same column. This may cause the relation to...
If you want to to create maps within SASS/SCSS-files, it normally works like this: $some-map: (key1: value1, key2: value2...
Haml 6 was a major rewrite with performance in mind. To achieve a performance improvement of 1.7x, some design...
Capybara has a variety of finder methods like find_button to help you look up DOM elements. There are also...
By activating strict_loading you force developers to address n+1 queries by preloading all associations used in the index...
We will achieve this by creating a block accepting method to optionally create and then lock a .lock File of...
Since Ruby 3.2.0 you can measure coverage support for eval statements and support has been added for the simplecov gem...
If you use a newer SSH key generated with the ED25519 algorithm instead of RSA (see Create a new SSH...
This is a checklist I use to work on issues. For this purpose I extracted several cards related to the...
In the past we validate and set default values for boolean attributes in Rails and not the database itself.
HTTP header values must only contain low-ASCII (7-bit) characters for safe transport. From RFC 7230: Historically, HTTP has...
Sometimes I ran across a GitHub merge request of a gem where it was not completely obvious in which version...
To retrieve only unique combinations of the selected attributes: You can omit rows, where all selected columns are equal with...
How a macro can dynamically define a method that can be overridden with super in the same class.
After upgrading to Rails 6.1.7.2 one of our apps printed a wall of warnings while booting: /var/www/app/shared/bundle/ruby/2.6.0/gems/net-protocol-0.2.1/lib/net/protocol.rb:68: warning: already...
Using ActiveRecord's #signed_id and .find_signed methods you can create URLs that expire after some time. No conditionals...