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Thanks for posting this. Along with the article posted here it clarified a lot of question I had.

• jamesbritt 17y ago
  It pains me that metaprogramming in Ruby is often treated as some mystic advanced voodoo topic, something only the adepts are free to enjoy. It may seem weird to someone coming to Ruby from VB or Java, but a little time peeking under the hood is revealing, and it should be one of the first things explained to Ruby Nubies (instead of shoved off into chapter 23 or something in the typical Ruby book).