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State Design Pattern

State Design Pattern is often overlooked in favor State Machines when it comes to Rails and object state management. However, the State Design Pattern is a highly effective open/closed solution to many state design woes.

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Double Polymorphic Associations in Rails

A quick overview of using associations to define good domain descriptions as well as good behavior.

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Thoughts on Interfaces for Models

After making small changes to a model, it got me thinking hard about how I build interfaces.