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...

Sometimes you want to use a vanilla Ruby method like a block. You can use Object#method to obtain a...

You can use this shell command: uniq -u input.txt output.txt

This article explains why some regular expressions take years to match against certain strings. A common culprit are nested repetition...

Sometimes you may need to figure out what branches exist on a remote repository so you can pull them down...

We are consistently having trouble with selenium-webdriver > 2.5.0 where whenever we try to select an option from a Capybara...

When you run rake db:create and get this error message Couldn't create database for {"encoding"=>"utf8", "username"=>"root...

Most likely you run rake and your code is causing an exception which is not the one shown in your...

whatsmydns.net is an online service that allows you to instantly perform a DNS lookup to check a hostnames current IP...

When your Solr seems to be started properly (a process is running with the correct data directory) but never responds...

When you put a Rake task into lib/tasks, but running it fails with... Don't know how to build task...

cURL makes a web request and shows you the response body. You can redirect the response body to /dev/null just...

Consider you have a website vhost listening to www.example.com, redirecting all incoming requests that do not talk about the configured...

ExecJS lets you run JavaScript code from Ruby. It automatically picks the best runtime available to evaluate your JavaScript program...

We forked craken today and fixed one of the issues we had with new (>0.8.7) rake versions. The craken:install...

Here is a way to create a duplicate of one database, with all its tables and their data, under a...

Random list of useful git commands for advanced users. I found some of them useful.

If your application raises an error like ... Couldn't connect to the Solr server at http://127.0.0.1:8983/solr. 500 "Lock...

You can use fold: fold -sw 60 You can now paste your texts. fold will echo them back, word-wrapped...

In order to open a Nautilus window in your terminal's working directory, you can say: nautilus .

When you drag a file from a Nautilus window into a terminal window, the file's path will be pasted...

The state_machine gem comes with a rake task that lets you generate PNG graphs from any model using state...

Whenever Firefox updates, all your Cucumber features that use Selenium break. This is annoying. In order to remedy this, version...