Is there a ruby method that just returns the value of a block?

Question

I know about Object#tap, which takes a value and returns that value. But is there a method that takes a block and returns the value evaluated by the block?

Answer 1

I think you could solve it with fibers. Something like:

def myfiber
    block = lambda{nil}
    loop{ block = Fiber.yield(block.call) } 
end
f = Fiber.new {myfiber }
f.resume

puts "result: #{f.resume(lambda{1})}"
puts "result: #{f.resume(lambda{5})}"
puts "result: #{f.resume(lambda{2})}"

will result in:

result: 1
result: 5
result: 2