Proc and lambda

define_proc_in_method.rb

class Testclass
  def mytest(&block)
	result = block.call
	return result * 2
  end
end



def myclient
  myproc = Proc.new{return 10}
  test = Testclass.new
  puts test.mytest(&myproc)
  # 123 would never be print
  puts '123'
end

# will print 10
puts myclient

define_proc_outside.rb

class Testclass
  def mytest(&block)
	result = block.call
	return result * 2
  end
end
	

myproc = Proc.new{return 10}
test = Testclass.new

# will print: `block in <main>': unexpected return (LocalJumpError)
puts test.mytest(&myproc)

lambda_sample.rb

class Testclass
  def mytest(&block)
	result = block.call
	return result * 2
  end
end
	

myproc = lambda{return 10}
test = Testclass.new

# will print: 20 
puts test.mytest(&myproc)