I want to run two rails apps which have rails version 3.1.10, 4.0.2 & ruby 1.9.2, 2.1.0. Is it possible to do this using Heroku?
As long as you specify the ruby and rails version in your Gemfiles, heroku will take care of it for you. I have an app running on ruby 1.9.2 and rails 3.2.13 and another on ruby 2.0.0 and rails 4.0.3.
Yes, It is possible just make sure that the ruby versions with rails 4. It requires Ruby version 2.0.0+. Just check the https://devcenter.heroku.com/articles/getting-started-with-rails4 https://devcenter.heroku.com/articles/getting-started-with-rails3 for the pre requisites.
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