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Hi! I'm Avdi Grimm, and this is my software development blog. More...
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Objects on Rails
A developer notebook on applying classic Object-Oriented principles to Ruby on Rails projects.
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Tag Archives: gems
DisplayCase Gem Now Available
Announcing the display_case gem, an implementation of the Exhibit pattern described in (and extracted from) “Objects on Rails”. Continue reading
Posted in Announcements
Tagged design patterns, exhibit, gems, libraries, objects-on-rails, oor, patterns, Presenter Pattern, ruby
5 Comments
FigLeaf Gem Now Available
One of the points I try to make in Objects on Rails is that you don’t need to let other libraries or frameworks dictate the public face of your objects. Just because you use ActiveRecord, for instance, to persist the … Continue reading
NoneSuch: The Greatest Ruby Gem EVAR
I am very proud to announce a brand new, incredibly cool Ruby gem: NoneSuch. Here’s a short video to introduce it. UPDATE: Got a NoneSuch success story? A disastrous failure story? Enter the contest and win a ticket to Day Camp 4 … Continue reading
[ANN] fail-fast 1.0.0 Released
Number two out of three in my weekend releasing spree, I’m happy to announce the availability of “FailFast”:http://fail-fast.rubyforge.org v.1.0.0. h2. Description FailFast is a collection of assertion methods intended for lightweight contract checking. h2. Installing sudo gem install fail-fast h2. … Continue reading
Posted in Uncategorized
Tagged assertions, dbc, fail-fast, gems, libraries, releases, ruby
4 Comments
[ANN] alter-ego 1.0.0 Released
Today I’m happy to announce the release of AlterEgo, a state-pattern library for Ruby. AlterEgo was born about a year ago, when I found a need to formalize state-based behavior in Ruby objects. I surveyed the existing libraries at the … Continue reading




