Update: The code has moved to NetFx project at http://code.google.com/p/netfx/source/browse/trunk/Source/Guard.cs . In the task of validating function arguments, usually a sealed class Guard is created. For example, if we want to validate for null...

If you have to generate xml in ruby I suggest take a look at builder gems. It has really little overhead to generate xml. Take a look to this example: require 'Builder' xm = Builder::XmlMarkup.new( :target => $stdout , :indent => 2 ) xm.instruct!...