帮忙用RUBY写个时间代码

你起码得给个strucutre吧。。比如你有什么object干什么之类的

class journal

    attr_accessor    :start_time

    def initialize
        #your code....
        @start_time = Time.now
    end

    def edit
        if timeout
            #cannot change your journal, return
            return false
        end
        ....
    end

    def timeout
        if Time.now - @start_time > 48*24*3600    #ruby use second as standard unit for time
            return true
        end
        return false
    end
end