A Review Of Immutability In RubyShared mutable state is the source of a lot of bugs. When two or more objects use the same piece of mutable data, they all have the ability to break each other in ways that can be hard to debug. If the shared data is immutable, however, these objects can not affect each other, and are effectively decoupled. This article is a review of the options available to Rubyists regarding immutability. We’ll
