ruby/doc/csv/arguments/io.rdoc
2020-07-20 02:32:53 +09:00

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* Argument +io+ should be an IO object that is:
* Open for reading; on return, the IO object will be closed.
* Positioned at the beginning.
To position at the end, for appending, use method CSV.generate.
For any other positioning, pass a preset \StringIO object instead.