loop.roop.rb

once_a_day(:thursday) do
  puts 'hello'
end

looper.rb

class Loop
  def initialize
    @all = {}
    @once = {}
    @today = lambda {|date| Time.now.send("#{date}?")}
    @count = 0
  end

  def defmeth( list , date , &block )
    code = { date => block}
    list.merge!(code)
  end

  def once_a_day(date, &block)
    defmeth(@once,date,&block)
    instance_variable_set("@accomplished#{@count}",false)
    @count += 1
  end

  def all_day(date, &block)
    defmeth(@all,date,&block)
  end

  def execute
    loop do
      "all:"
      @all.each do |key,value|
        while @today.call(key)
          value.call
        end
      end
      @once.each do |key,value|
        @once.to_a.each_index do |i|
          unless instance_variable_get("@accomplished#{i}")
            if @today.call(key)
              value.call
              instance_variable_set("@accomplished#{i}",true)
            else
              instance_variable_set("@accomplished#{i}",false)
            end
          end
        end
      end
    end
  end
end
looop = Loop.new
Dir.glob("*.roop.rb").each do |file|
  irb looop
  looop.instance_eval do
    load file
  end
end

output

loop.roop.rb:1:in `<top (required)>': undefined method `once_a_day' for main:Object (NoMethodError)
	from looper.rb:50:in `load'
	from looper.rb:50:in `block (2 levels) in <main>'
	from looper.rb:49:in `instance_eval'
	from looper.rb:49:in `block in <main>'
	from looper.rb:48:in `each'
	from looper.rb:48:in `<main>'