method

raw_encoding

ruby latest stable - Class: CSV

raw_encoding(default = Encoding::ASCII_8BIT)

private

Returns the encoding of the internal IO object or the default if the encoding cannot be determined.

# File lib/csv.rb, line 2303
  def raw_encoding(default = Encoding::ASCII_8BIT)
    if @io.respond_to? :internal_encoding
      @io.internal_encoding || @io.external_encoding
    elsif @io.is_a? StringIO
      @io.string.encoding
    elsif @io.respond_to? :encoding
      @io.encoding
    else
      default
    end
  end

raw_encoding

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