How do I “activate” a different version of a particular gem?

Question

I want to switch between rails 2.3.10 as the \"active\" gem for my OS, so that I can invoke it at the command line.

Is it possible to do this? I\'m not using rvm. Ma

Answer 1

EDIT: Just saw your RVM mention in the post. Definitely the way to go.

You're going to want to install RVM -- it's an amazing package that will let you manage different Rubys and different sets of gems on the same machine. You can switch back and forth with total ease.

Here's the installation guide: http://rvm.beginrescueend.com/rvm/install/

Once you got everything get up, you can see all of your installed rubys at the command line with with rvm list, and switch with rvm use ruby-head, for example. RVM keeps the gems on each ruby separate, which should help with your question.