Leila Hamon questions

• In MongoDB's native NodeJS Driver, when to use MongoClient constructor and when to use the Db constructor?
• What is the @ symbol in Javascript?
• How to change writable enumerable and configurable values of a Javascript object property?
• How do import a Javascript file into a Haml view?
• How to write device drivers in Javascript?
• How to get a listing of key value pairs in an object? [duplicate]
• How to get the element clicked on?
• Why would a developer ever need PhantomJS as opposed to just using some testing framework?

Leila Hamon answers