It is a common misunderstanding that all [op]=-operators work the same way, but actually they don't. ||= and &&=
...default, dmesg shows a timestamp: 12:59:26 fnordomator ~ > dmesg | tail [101925.211846] usb 2-1.1: USB disconnect, device number 16 [110486.855788] usb 2-1.1: new high-speed USB device number...
...fnordomator ~ > dmesg -T | tail [Di Apr 21 12:43:16 2015] usb 2-1.1: USB disconnect, device number 16 [Di Apr 21 15:05:57 2015] usb 2-1.1: new...
You can freeze any Ruby object to prevent further modification. If you freeze an ActiveRecord and try to set an...
Rails comes with a Rake task notes that shows code comments that start with "TODO", "FIXME", or "OPTIMIZE".
In RSpec you can tag examples or example groups with any tags you like simply by saying describe ReportCreator, slow...
Code folding is a very useful feature to me. It gives me a quick overview over a file and keeps...
# Given the following models class Image < ActiveRecord::Base has_many :album_images has_many :albums, through: :album_images
To use a form model with devise, you can simply override #resource_class in a controller. A typical use case...
List of cloud services and SaaS with a free tier for developers or that are generally free for open source...
Fontawesome 4 ships with many useful CSS helper classes. Enlarge Icon Add fa-lg (133%), fa-2x, fa-3x, fa...
Fontawesome 4 has introduced new naming conventions that make it easy to retrieve variants of a given icon.
When using threads, you must make your code thread-safe. This can be done by either locking (mutexes) all data...
This cheat sheet...
...aims at providing a quick reference to the most commonly used features in AngularJS.
When ending a Selenium test Capybara resets the browser state by closing the tab, clearing cookies, localStorage, etc.
There are some frontends available, but they all suck, are no longer maintained or are hard to install.
You know that ActiveRecord caches associations so they are not loaded twice for the same object. You also know that...
Now supports RSpec 3 and Rails 4 Drops support for state_machine, which has some issues with Rails 4 and...
Awesome hack by Tim VanFosson:
Instead of this: Image.order('images.created_at DESC') You can write this: Image.order(created_at: :desc) Not only do you not...
It's generally not trivial to change a datetime's seconds, minutes, etc in SQL. Here is how it works...
Today I learned that Ruby on Rails has shipped with a built-in slug generator since Rails 2.2:
Nested exceptions for Ruby: When you rescue an error and then re-raise your own, you don't have to...
Clever hack using data-attributes to assign labels to cells. It's still a massive duplication of code (labels), but...
RSpec 3 has verifying doubles. This breed of mock objects check that any methods being stubbed are present on an...