object oriented analysis and design ebook

Software Engineering--the design of the face object of theory, method and practiceIn the phase of object analysis, it is necessary to focus on what the system does, while in the design phase, it will focus on the software implementation of the system, including architecture

Understanding object-oriented design through several functional numbering evolutionsdef01.py1Dog1 = {2 'name':'hanyyyy',3 'Gender':'female',4 'type':'Tibetan Mastiff'5 }6DOG2 = {7 'name':'Lee Lee',8 'Gender':'Public',9 'type':'Sausage'Ten } One A defJiao (dog): - Print('a dog [%s], Barking'%dog['name']) - the defYaoren (dog): - P

Just like the location of Newton's three major laws in classical mechanics, the Open-Closed Principle is the cornerstone of object-oriented reusable Design (Object Oriented Design or OOD. Other

1. Opening and closing principle (the Open Closed principle OCP) A module should be open in terms of extensibility and should be closed in terms of modification. Therefore, the interface encapsulation mechanism, abstract mechanism and polymorphic technique should be considered as far as possible in object-oriented design. The principle is also suitable for non

during analysis. "whoever owns this attribute has the method to operate this attribute." This experience applies to many situations, this is the first thing we need to consider in our analysis. When this principle cannot solve the problem, we need to think about other methods. We must make it clear that no matter how we analyze it, the ultimate goal is to abstract objective things into a form that can be e

Common Features of Excellent Software: low coupling and High Cohesion Polymorphism: static polymorphism (function polymorphism, function overload), dynamic polymorphism (virtual function) Basic object-oriented principles Principle of opening/closing: a module should be open to expansion and should be closed for modification. Principle of full replacement: The derived class should be able to completely repla

The most important thing is my core Object-Oriented Analysis ideas: 1() Identify the most critical business scenarios. Generally, you can use verbs to search for them. For example, in the recruitment system, a candidate is a one-time candidate to deliver a position, and a candidate is a business scenario; if a student takes an exam in a certain course, the e

can be built by sticking design patterns, how the interfaces of these patterns, whether the existing models are sufficient, and what types of models should be used. 3,How can we systematically develop applications using the design mode. WhilePoadThese problems can be solved:Poad--Pattern-Oriented Analysis and

. Therefore, when testing the SQRT (calculate the square root) operation (this operation returns an error message when the input is negative, check the boundary: a negative number close to zero and zero itself. "Zero" is used to check whether the programmer has made the following mistake: Set the statement if (x> = 0) calculate_square_root (); If (x> 0) calculate_square_root (); In order to predict possible errors in the software, the analysis model a

direction as much as possible, that is, the top-level classes should share work in a unified manner according to the design. (13) do not create all-powerful classes/objects in your system. Be especially careful about the classes whose names include Driver, Manager, System, and Susystem. Plan an interface instead of implementing an interface.(14) be careful with classes that define a large number of access methods in public interfaces. A large number

Object-oriented design principlesBorn to support maintainability multiplexing, these principles are embedded in many design patterns, which are the guiding principles that are summarized in many design scenarios, and understand Object