Bash loop over dict map struct (kind of)
So here's an intersting bash loop construct kind of like looping over
a simple dict, map, or struct.
http://www.linuxjournal.com/content/bash-brace-expansion
$ for d in build_{debian,centos}_{32,64}bit; do echo "${d}"; done
build_debian_32bit
build_debian_64bit
build_centos_32bit
build_centos_64bit
