Rails 4.1.0: Spring, Variants, Enums, Mailer previews, secrets.ymlRails 4.1.0: Spring, Variants, Enums, Mailer previews, secrets.yml Rails 4.1.0 might carry a minor version bump, but there’s nothing minor about the bag of goodies it carries. It simply means that upgrading from 4.0.x should be a relatively mild affair as most of the changes are additions or improvements, not backwards-incompatible changes. Let’s go over some of those new goodies. Spring is our ne
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