empty_value
Specifies the object that is to be substituted for each field that has an empty String.
Default value:
CSV::DEFAULT_OPTIONS.fetch(:empty_value) # => "" (empty string)
With the default, ""
:
CSV.parse_line('a,"",b,"",c') # => ["a", "", "b", "", "c"]
With a different object:
CSV.parse_line('a,"",b,"",c', empty_value: 'x') # => ["a", "x", "b", "x", "c"]