class NIO::ByteBuffer

def write_to(io)

Returns:
  • (Integer) - number of bytes written (0 if the write would block)

Parameters:
  • Ruby (IO) -- IO object to write to 
def write_to(io)
  nbytes = @limit - @position
  raise UnderflowError, "no data remaining in buffer" if nbytes.zero?
  bytes_written = IO.try_convert(io).write_nonblock(@buffer[@position...@limit], exception: false)
  return 0 if bytes_written == :wait_writable
  @position += bytes_written
  bytes_written
end