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個簡單的類CashRegister,Bill和Position。 CashRegister由Bill對象組成,Bill對象由Position對象組成。他們作爲跟隨 class CashRegister
def initialize
@bills = []
end
def product_frequency
#???
end