Software Development (CSC 321 2016S) : Outlines
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Related Courses: [Rails Tutorial] [CSC 321 2016S @ EdX] [CSC 321 2015S (Davis)] [CSC 321 2015F (Rebelsky)] [CSC 322 2016S (Rebelsky)]
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Back to Outline 15 - Codes of Ethics, Revisited. On to Outline 17 - UML.
Summary
We explore issues of working with legacy code and how code smells and refactoring will help us not just with legacy code, but with all of our code.
Related Pages
Overview
Administrivia
On a sheet of paper (supplied), answer the following questions.
From Field et al., pp. 2-4.
class Movie REGULAR = 0 NEW_RELEASE = 1 CHILDRENS = 2 attr_reader :title attr_accessor :price_code def initialize(title, price_code) @title, @price_code = title, price_code end end class Rental attr_reader :movie, :days_rented def initialize(movie, days_rented) @movie, @days_rented = movie, days_rented end end class Customer attr_reader :name def initialize(name) @name = name @rentals = [] end def add_rental(arg) @rentals << arg end def statement total_amount, frequent_renter_points = 0, 0 result = "Rental Record for #{@name}\n" @rentals.each do |element| this_amount = 0 # determine amounts for each line case element.movie.price_code when Movie::REGULAR this_amount += 2 this_amount += (element.days_rented - 2) * 1.5 if element.days_rented > 2 when Movie::NEW_RELEASE this_amount += element.days_rented * 3 when Movie::CHILDRENS this_amount += 1.5 this_amount += (element.days_rented - 3) * 1.5 if element.days_rented > 3 end # add frequent renter points frequent_renter_points += 1 # add bonus for a two day new release rental if element.movie.price_code == Movie.NEW_RELEASE && element.days_rented > 1 frequent_renter_points += 1 end # show figures for this rental result += "\t" + element.movie.title + "\t" + this_amount.to_s + "\n" total_amount += this_amount end # add footer lines result += "Amount owed is #{total_amount}\n" result += "You earned #{frequent_renter_points} frequent renter points" result end end