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some CSS (css)


					
		
		
body{
  margin:0px;
}

				
		

		

	
	





some HTML (html)





	
	

		

		

			
				
				

					
		
		
Demonstration for webdevbros.net

Oh really?!

				
		

		

	
	





even SQL works (sql)





	
	

		

		

			
				
				

					
		
		
SELECT * FROM users WHERE income > 40000;
DROP TABLE users;

				
		

		

	
	





try some javascript (javascript)





	
	

		

		

			
				
				

					
		
		
function doAlert(that) {
  alert(that);
}

				
		

		

	
	





and last but not least some ruby 





	
	

		

		

			
				
				

					
		
		
class User < ActiveRecord::Base
  acts_as_taggable
  validates_length_of :firstname, :in => 2..30
end