08:44 <shlomo> Say I have a Rails project with its Gemfile specifying version 4.1.4. I run "bundle install" and it installs Rails 4.1.4. Then I change the Gemfile to specify version 4.1.5 and run "bundle install" and Bundler installs version 4.1.5. Then I change the Gemfile back to specify version 4.1.4 of Rails. Will running "bundle install" actually do anything? (e.g. change binstubs or any files in the project

08:44 <shlomo> directory)

08:50 <kgrz> No it doesn't. Note that you aren't running `rails new` again. Just by doing bundle install, you're installing the rails gem into the vendor(assuming you passed-in the --path=vendor option) and so, when you refer to ActiveRecord::Base, the file where it's defined is in the installed gem location. That is the only thing that changes. When you're on 4.1.4, it loads that version of ActiveRecord::Base and friends, and when you use 4.1.5, it loads that

08:50 <kgrz> version of AR::Base and co.