Extract and replace methods for dbData objects

Provides extraction ([) and replacement ([<-) methods for dbData objects. The extractor attempts to auto-reconnect via dbReconnect() before returning the underlying database-backed value.

Arguments

x

A dbData object.

...

Additional arguments passed to the extractor.

value

Replacement value for [<-.

Value

For [: the underlying value stored in the object. For [<-: the updated dbData.