Solving the Expression Problem with Clojure 1.2

Duplicates, but with no discussion:

http://news.ycombinator.com/item?id=2014181

http://news.ycombinator.com/item?id=2007700

Related:

http://news.ycombinator.com/item?id=1916943

http://news.ycombinator.com/item?id=1607832

This is NOT the similarly-named talk by Chris Houser from Strange Loop 2010, in case anyone else was thinking the same thing. This (from Stuart Sierra) is worth a separate read, and has nice visuals with a row/column metaphor.