In the view there is a regular Rails form and a javascript function that will be triggered when the country select field is changed. The javascript function will make an ajax request to the country_select url with the country code passed as the id variabl...

If you want to time how long a piped bash command take, use the `time` command followed by your commands in parens like so.. time (ls -lha | wc -l)

Using the Acts as Taggable On plugin to add categories to a model class, I wanted to override the to_param method and place the name attribute in the url. The plugin, installed as a gem, source shouldn't need to be hacked in order to accomplish this. The ...

Make a directory ( it can anywhere ) called baks/mysql mkdir -p /baks/mysql Create a file (it can be anywhere) called /root/mysql_backups.sh and put this script in it #!/bin/bash # modify the following to suit your environment export DB...

This actually has more to do with Rails and/or Sinatra than it does with Heroku. You have to enable IFrame support in your headers explicitly. With Rails you can add this to your config/application.rb file config.action_dispatch.default_headers = ...