VitalyP questions

• Rails 3.1 on Ubuntu 11.10 under VirtualBox very slow
• How to add some symbol to every word in string?
• How to get previous page route in Symfony?
• Symfony2: entity asserts that accept an array of types?
• Symfony2 login FOS UserBundle in functional tests
• Symfony2 functional testing InvalidArgumentException: The current node list is empty
• KnockoutJS if statement inside foreach loop
• PayPal: express checkout pay without account
• Symfony2: how to log user out manually in controller?

VitalyP answers