fiber_arguments

🎯 Passing Values In and Out of Fibers

Fibers can exchange data with the caller by passing arguments to resume and returning values from the block. This pattern is useful for simple coroutines, pipelines, or implementing generators. Remember each resume returns the value passed to the corresponding yield, and vice versa.

fiber = Fiber.new do |initial|
  puts "Received: #{initial}"
  next_value = Fiber.yield("yielded value")
  puts "Received next: #{next_value}"
  "final result"
end

# Start and capture yield
yielded = fiber.resume("start")  # => "yielded value"
puts yielded                       # => "yielded value"

# Resume with next data and capture return
result = fiber.resume("more data")
puts result                        # => "final result"