I am currently looking to find good Ruby on Rails hosting. I tried two web hosting plans from two different companies, and I am not convinced. I like to run Mongrel on my server, and I really need high availability.

I found a huge list here, but it is hard to choose the perfect web hosting company. Most web site hosting companies are good at Php hosting. I can always find great php hosting, some of these hosting companies runs ruby on rails using light http server or using Fast CGI which seems sucks.

In general, programming languages fall into one of two categories: they're either compiled languages or scripting languages. Let's explore what each of those terms means, and understand the differences between them.

Cairo is a powerful 2d graphics library. This document introduces you to how cairo works and many of the functions you will use to create the graphic experience you desire.

In order to follow along on your computer, you need the following things:

1. Cairo itself,
2. Python to run the code snippets, and
3. PyCairo to join the previous two.

You can fire up the interactive Ruby shell by entering irb into a terminal window.

Not the Standard DOS Box!
Windows users, don't forget to use the Open Ruby Console option from the Instant Rails control panel, to make sure the environment you're using contains the right settings.

irb allows you to issue Ruby commands interactively, one line at a time. This is great for playing with the language, and it's also great for debugging, as we'll see in Chapter 11, Debugging, Testing, and Benchmarking.