Mykola Borysyuk questions

Mykola Borysyuk answers

• Remove Multiple Items from Array using underscore.js?
• Determine if browser is using mobile data or wifi?
• update with upsert: true is not updating in express,mongoose?
• "Server x timed out" during MongoDB aggregation
• write a javascript object to a file in node
• NodeJs Express send 403 and render
• Why would I need template engines like Jade or EJS on the backend?