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[ruby/csv] Add missing file doc/argument_io.rdoc (#140)
https://github.com/ruby/csv/commit/e37f04aa5c
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2020-07-20 03:35:37 +09:00
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doc/argument_io.rdoc
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doc/argument_io.rdoc
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* Argument +io+ should be an IO object that is:
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* Open for reading; on return, the IO object will be closed.
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* Positioned at the beginning.
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To position at the end, for appending, use method CSV.generate.
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For any other positioning, pass a preset \StringIO object instead.
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