The shell variable PS1 holds your bash prompt. You might want to change it to serve your needs best. Here...
Now allows to list transition paths from and to arbitrary states.
Add deprecation warnings and their solution or link to available solutions. Global access to Rake DSL methods is deprecated. Please...
Depending on where you live, different rules are used to determine the number of the week and a weekday. You...
When you click a link or a press a button on a Selenium-controlled browser, the call will return control...
So you are comparing two Time objects in an RSpec example, and they are not equal, although they look equal...
In order to cover some edge cases you rarely care about, Range#include? will become very slow in Ruby 1.9...
After updating your RubyGems, you will probably not be able to run Capistrano any more, but receive an error similar...
If you want to get a deep understanding of how closures, blocks, procs & lambdas in Ruby work, check out the...
On 32bit systems, the maximum representable Time is 2038-01-19 03:14:07 in UTC or 2038-01-19...
The code below shows a method #validate which uses Nokogiri to validate an XML document against an XSD schema. It...
A check if two date or time ranges A and B overlap needs to cover a lot of cases:
Note: Consider not doing this. Use form models or vanilla methods instead. The :conditions option for Rails associations cannot take...
Given those modules: module A def foo; end def bar; end end module B end When you want to call...
Given group size If you would like to split a Ruby array into pairs of two, you can use the...
In case https://www.rubydoc.info/ is to slow or offline, you can also read a gem documentation offline. Start a server...
I love ETags, but there’s something that annoys me: most implementations revolve around pulling a record out of a...
If you're on Ubuntu: sudo apt-get install ruby-dev On other platforms: Look for a package containing ruby...
Update: This trick probably isn't very useful anymore in Ruby 2.x. The Ruby GC has improved a lot...
If you’re testing the behavior of deprecated code in your Ruby project, the warning messages littered throughout your spec...
If you want to iterate over a Range, but only look at every n-th element, use the step method...
When your block takes an argument that should have an default, only in Ruby 1.9 you can say: block = lambda...
This must be one of the coolest, yet quite unknown, technique in Ruby. For certain types of problems (e.g. when...
In regular expressions you can use the zero-width pattern \b to match the beginning or end of a word...