Cjoerg questions

• How to switch MongoDB database on the fly while using db.collection.insert()?
• How best to keep a job queue clean of retry/duplicate jobs (using sidekiq and redis-semaphore)
• Programmatically add new jquery-select2-4 option and reset the search field?
• Ruby: How to generate CSV files that has Excel-friendly encoding
• Error while installing Nokogiri (1.6.7) on El Capitan

Cjoerg answers