This card will show you a cool way to define a class using Struct.new. A common usecase for Structs are...
Rails default config uses the ActiveSupport::Cache::NullStore and disables controller caching for all environments except production: config.action_controller.perform_caching = false...
If you use the Better Errors gem, you will sometimes notice that it can be very slow. This is because...
Shoulda Matchers don't provide canditional validations (validations with if: option). Here is how to write tests for the condition...
RawGit serves raw files directly from GitHub with proper Content-Type headers, for CDN-like purposes. Note that they don...
When using GROUP BY, MySQL now complains if the SELECT includes columns which are not part of the GROUP BY...
Nowadays it is fairly easy to intercept and modify mails globally before they are sent. All you have to do...
ChromeDriver clicking works by simulating a mouse click in the middle of the element's first client rect (or bounding...
Since Rails 5, domain models inherit from ApplicationRecord by default. This is the place to put code that should be...
To easily opt out of notifications for a large number of Github repositories, go to https://github.com/watching.
When you have a multi-server setup, you'll be adding a new server from time to time. Before doing...
Rails supports time zones, but there are several pitfalls. Most importantly because Time.now and Time.current are completely different things and...
Ubuntu might create several keyrings for you. Note that keyring passwords are initially set to the user password but do...
This is useful if, for example, you want to use a background-image that has to scale with the width...
This card will show you how to use git rebase --onto without confusion. Use case: You've got two feature...
Webmocks hash_including is similar to RSpec::Mocks::ArgumentMatchers#hash_including. Be aware that hash_including (webmock v3.0.1) doesn't...
You can use gem list to list all gems available from a remote gem server: gem list -r --clear-sources...
Typhoeus has a different way of representing array params in a get request than RestClient. Typhoeus: http://example.com/?foo[0]=1&foo[1]=2&foo[2]=3
TLDR: Browser implementations of HTTP/2 push are horrible. You might end up with worse performance than without pushing. However, the...
By default Middleman generates files with a .html extension. Because of this all your URLs end in /foo.html instead of...
Middleman is a static page generator that brings many of the goodies that Rails developers are used to.
Sometimes, through some firewall or proxy misconfiguration, you might have to deploy to a server that cannot access the git...
Dump this method into your Ruby console to quickly print data in columns. This is helpful for e.g. comparing attributes...
Assuming you're wanting to undo the effects of git rm or rm followed by git add -A or something...