Sometimes you want one distinct version of RubyGems to be installed to replicate the same behavior across multiple servers.
Although it's tempting flirt with detecting mobile/touch devices with CSS media queries or Javascript feature detection alone, this approach...
Basically, you now need to know if your project uses a "real" time zone or :local, and if config.active_record.time_zone...
After my update from MacOS X 10.6 Snow Leopard to 10.7 Lion the search function in Apple Mail stopped working...
When Rack::Bug has been added to your project and your Apache2/Passenger only replies with an Error 500 (Internal Server...
To reduce download time, application servers usually serve content using gzip compression, if the browser supports it.
When you have a complex recipe setup with multistage deployment you may run into this error: `role_list_from': unknown...
If you turn on stylesheet caching, it might happen that stylesheets from different locations with different relative pathes will be...
Git has a built-in repository viewer for your web browser. a bit similar (but less awesome) than github.
You have to specify the environment with -e env_name or RAILS_ENV=env_name if you want to run...
You can group contacts using a mailing list in Thunderbird for easier access and less trouble when trying to find...
After starting the Rails server in a freshly generated Rails 3.1 project you could see an error message such as...
When using the screen tool you may be unable to start a screen session but instead encounter an error:
To show the MySQL default character set you have to login to the MySQL console and execute SHOW VARIABLES LIKE...
You can convert git commits into patch files. Those can be used to apply to a different repository [1] or...
If you specify different ports, you can run multiple local webricks with rails server --port=300X at the same time...
The Rails logger will store its content in a buffer and write it into the file system every 1000 lines...
Looks simpler than inaction_mailer: gem install mailcatcher mailcatcher Setup Rails to send mails to 127.0.0.1:1025. Usually you want...
When you require the Ruby debugger to be available from your Rails console (e.g. you want to inspect a method...
In case you have sensitive data within your RDS instance, you want to use encrypted connections between your application and...
The technique described in this card has an important caveat: The result of GROUP_CONCAT is truncated to the maximum...
There is a new card about how to do this with the new AWS Command Line Interface
If Rails or Rake are complaining about a missing gem that is listed in your Gemfile.lock and the listed version...
whatsmydns.net is an online service that allows you to instantly perform a DNS lookup to check a hostnames current IP...