It takes efforts to write a simple Transformer using ast. Along the way of making one, your instinct will tell you that doing so is a bad idea, probably. In Ru

It takes efforts to write a simple Transformer using ast. Along the way of making one, your instinct will tell you that doing so is a bad idea, probably. In Ruby, meta-programming is always powerful and always so easy to use. I don't have problem using these methods, but it pains me when some crappy monkey-patching-flavored gem (For example, cache-money) decided to bite me intermittently. Or when debugging the code of some kick-ass-ninja-rockstar programmer where he decided to generate methods using both class_eval and instance_eval (along the way, generating the "def statements" using string interpolation) inside a module that supposed to be injected into ActiveRecord object. I do agree with your last paragraph completely. The real ninja is capable of stopping himself from beheading anyone he sees just because he can.