some updates about Clojure and introduction to create web application with MongoDB on Heroku.

18. user=> (use 'hiccup.core)
nil
user=> (html [:span {:class "foo"} "bar"])
"<span class="foo">bar</span>"
user=>

26. $ sudo gem install heroku
$ gem list heroku
*** LOCAL GEMS ***
heroku (2.4.0)
$ sudo port install git-core
$ port installed git-core
The following ports are currently installed:
git-core @1.7.0_0+doc+gitweb+svn (active)

27. $ sudo port install mongodb
$ mkdir -p ~/local/var/db/mongodb_data
$ mkdir -p ~/local/var/log/mongodb
dbpath = /Users/kaku/local/var/db/mongodb_data
fork = true
logpath = /Users/kaku/local/var/log/mongodb/mongodb.log
logappend = true
$ mongod -f mongod.conf

28. $ lein new mogomogo
$ cd mogomogo
web: lein run -m mogomogo.core
$ git init
$ git add .
$ git commit -m "Initial commit"
$ heroku create --stack cedar
$ git push heroku master

35. $ heroku addons:add mongohq:free
$ git commit -a -m "Updates"
$ git push heroku master