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Ah, Eigenclass

I never knew how this worked nor heard of Eigenclass but have used find_by…. Nice clear explanation 🙂

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There is a point in a Ruby-ist’s life where you dig a little too deep into the depths of metaprogramming.

Sometimes the result is incredibly cool, like Rails. Rails uses a lot of metaprogramming in order to save you a lot of effort.

For example, there’s some nifty work being done in order to create the find_by methods through combining method_missing and the Eigenclass. This particular post is about the Eigenclass but you can find a pretty good explanation of method_missing here.  But for more about Eigenclass, read on. 

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