fallbackFields: Replace missing values in ields by default fallback values
Description
Replace all missing values in fields (either missing or NA) with
their corresponding values from fallback. Members in fallback that are missing
in fields are inserted
Usage
fallbackFields(fields, valuelist)
Arguments
- fields
existing list
- valuelist
list of fields to replace in fields. Only keys that are missing in fields are added, no existing fields in fields are overwritten