This is a sample using jqgrid + mongodb.
You can view and search for Japanese Zip-Codes.

Instll gems.
    $ bundle install

Start mongd.
    ( $ mondod --dbpath=mongo )

Donload and import zipcode data.
    $ ./import.sh

Start the application.
    $ bundle exec ruby app.rb

Access http://localhost:4567

See screen/*.png

--- End of File ---