Dan Sosedoff questions

• Caching best practiced in Merb
• Javascript TCP connection to server
• Complex DataMapper query association
• Is there a way to communicate with USB devices on Android?
• Where can I find a city/neighborhood database?
• Is there a way to communicate with USB devices from browser?
• Ruby mp3 Id3 parsing
• Is there a way to attach Ruby Net::HTTP request to a specific IP address / network interface?
• How to deal with memory leaks in RMagick in Ruby?

Dan Sosedoff answers