Ruby's regular expressions can be represented differently. When serializing them, you probably want to use inspect instead of to...
So you're getting an error like this: undefined method `activate_bin_path' for Gem:Module (NoMethodError)
TL;DR: Update the 'net-ssh' gem by adding to your Gemfile: gem 'net-ssh', '=2.9.1' Now run bundle update...
So you're getting this failure when running bundle install on an older project: Your Gemfile.lock is corrupt. The following...
Plot graphs in Ruby WebGraphviz renders in your browser via JavaScript (to store the rendered graph, extract the SVG using...
This card tries to summarize by example the different uses of heredoc. In Ruby << vs. <<- vs. <<~ In Rails strip_heredoc...
You can use three different versions of the regular expression syntax in grep: basic: -G extended: -E(POSIX)
This method will remove automatically installed packages that no other packages depend on any more. This, of course...
If you use awesome 3.5, and a gnome or mate panel, the panel will often receive focus when you switch...
There is no CSS selector for matching elements that contains a given string ¹. Luckily, Capybara offers the :text option to...
When you're writing specs for ActiveRecord models that use memoization, a simple #reload will not do: it 'updates on...
Yesterday I stumbled across a talk in which the guy mentioned module sub-classing. I was curious what you can...
A haml angular 1 template with .thing(class="is-{{:: item.type }}") will be compiled (by haml) to which is not what...
In order to have monitoring for Sidekiq (like queue sizes, last run of Sidekiq) your application should have a monitoring...
Instantiating ActiveRecord objects comes expensive. To speed up things, you can choose a more direct way to talk to your...
When working with custom transactions and use ActiveRecord::Rollback you may encounter unexpected behaviour if you try to roll back...
If you want to find the commits that touched a specific text in a file, use git log -G 'text...
Run dconf-editor (as your user) Go to org / mate / panel / objects / clock / prefs Change the key format to custom...
Detect if a gem has been activated A gem is activated if it is either in the current bundle (Gemfile.lock...
We have released a new library Gemika to help test a gem against multiple versions of Ruby, gem dependencies and...
Rails 5 migration classes look like this now: class CreateUsers < ActiveRecord::Migration[5.0] Mind the [5.0] at the end.
These are Chrome plugins that proved useful at makandra. Each is the best-in-class. Dimensions Auto-measure distances by...
ActiveSupport::Notifications provides an instrumentation API for Ruby. It is used throughout rails to publish instrumentation events that include information...
Similar to our snippet that runs all Cucumber features matching a given string, the following will run all modified or...