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I saw another interesting Lisp posting that pointed me to a video by Rainer Joswig.

Rainer was responding to Martin Fowlers DSL Entry, and he recorded a session of code writing to implement a clean solution.

What is particularly interesting to watch is:

• How Rainer builds a class and method first, and then refactors to macros (code gen). How Lisp.
• How Rainer works the environment. At some points you wish he could Ctrl-Space :)
• How nice it is to be able to look at the stack in such a simple way

Oh and a funny quote:

"He even has a Java version here, but lets not look at it, it's not pretty"