My favorite code

• I came up with rrrex, a new syntax for expressing regular expressions in Ruby.
• I wrote and maintain Scisr, a refactoring tool written in and for PHP.
• I'm one of the lead developers on GrinnellPlans (and the Rails rewrite), a homegrown social platform for members of the Grinnell College community.
• I worked on the regular expression engine in Vim, sponsored by Google Summer of Code.