所以,我有如下的例子: movies = {
dobby: "dobster is a lad",
pirates_of_the_carribean: "Its all about jack sparrow kicking ass!"
}
puts "what do you want to know about?\n
#{movies[:dobby]}. = 1\
我有3个简单的类CashRegister,Bill和Position。 CashRegister由Bill对象组成,Bill对象由Position对象组成。他们作为跟随 class CashRegister
def initialize
@bills = []
end
def product_frequency
#???
end