PUBLIC MARKS from mbertier with tag rails

Hooks are just one of the techniques available to us for robustly handling extension in a language as dynamic and powerful as Ruby. Another is using the dependency injection style1 to decouple classes from each other and allow third parties to substitute their own classes without monkey patching. Another un-sexy but important practice is simply writing clear and comprehensive documentation of our classes’ APIs and extension points.

The article then goes on to show how to install Rails and Ruby on a PC and build a working "scaffold" application with virtually no coding.