throttle.rb

class Throttler
  def initialize(time_limit, &block)
    @block      = block
    @created_at = Time.now
    @time_limit = time_limit

    @block.call()
  end

  def call
    @block.call() if call_now?
  end

  def call_now?
    Time.now > @created_at + @time_limit
  end
end

function = Throttler.new(1) do
  puts "Hello World"
end

function.call()
function.call()
function.call()