object oriented design book

); parent.goSchool(); parent.pay(); parent.getBook(); parent.goHome(); }}? Usually the beginning of the school report is very happy, because after all, just finished years, received a lot of lucky money, but also waiting to go to school flowers quickly. But Xiao Ming too much love, too little money, rather die than report, to Xiao Ming himself to the school report too difficult, Xiao Ming's parents had to replace Xiao Ming to register. Instead of Xiao Ming to enrol

interface injection;That is, in the function declaration, the argument is an abstract class or interface, which implements the transitive dependent object, thus achieving the purpose of directly using the dependent object.can be summarized as interface passing, construction method passing and Setter method is passed. The core of the dependency inversion principle is that we should interface programming, understand interface-

: This article mainly introduces (5) Object-Oriented Design Principles 1 --- general principles and single responsibility principles. if you are interested in PHP tutorials, refer to them. I. general principles: 1. five object-oriented principles: single responsibility prin

engine does those things. First, try traversing the properties in B, but not the Name property. The request to find the name attribute is delegated to the prototype of the constructor of object B, which is b.__proto__ logged and points to B.prototype, and B. The prototype is set to an object created through new A (). The name attribute is still not found in the

mind anyway) Good encapsulation, (interface to reasonable, physical design for the fact, do not have much interface, many, good) The granularity of the class should be reasonable Consider the correctness of dependencies. (Do not reverse-rely on inverted errors, such as the design of the logical layer and the UI, you are in the logical class of the process relies on the interface of the UI layer an

in Iofile.However, virtual inheritance is not commonly used because: 1. Virtual inheritance increases the cost of space and time. 2. Virtual inheritance can be very complex (writing costs) because the virtual base class, either indirectly or directly inherited, must assume the initialization of these bases, regardless of how many layers of inheritance are. Please rememberMultiple inheritance is more complex than single inheritance. It can lead to new ambiguity and the need for

expresses a specific object (type code) that affects the behavior of the class and may cause the branch statements associated with that type to appear frequently in the program, we should create a new derived class and use polymorphism instead of his Refinement subclasses: Sometimes, some properties in a class only make sense for some instances of the object, which means that the class's plan is not p

The merging Reuse Principle is also known as the composition/aggregate Reuse Principle and carp principle. Its definition is as follows: Composite Reuse Principle (CRP): Use object combinations as much as possible instead of inheritance to achieve reuse. The merging Reuse Principle is to use some existing objects in a new object through the association relationship (including the combination

in the use of object-oriented thinking system design, the predecessors summed up a total of 7 principles, respectively, are: Single duty principle, open and close principle, Richter replacement principle, Dependency injection principle, interface separation principle, Dimitri principle and priority use combination rather than inheritance principle.

S.O.L.I.D is the acronym for several important coding principles (programming Priciple) in object-oriented design and programming (Oodoop). SRP the single Responsibility principle single responsibility principle OCP the Open Closed principle LSP The Liskov Substitution Princip

S.O.L.I.D is the acronym for several important coding principles (programming Priciple) in object-oriented design and programming (Oodoop). SRP the single Responsibility principle single responsibility principle OCP the Open Closed principle LSP The Liskov Substitution Princip

Document directory Advantages and disadvantages of Combination Inheritance Inheritance/combination Example 1 Inheritance/combination Example 2 Rule 1: Prioritize (object) combinations, rather than (class) Inheritance [Favor composition over inheritance] Combination1. (object) combination is a method of reusing new functions by creating an object that comb

indexed in the return table return {withdraw = WI Thdraw, deposit = deposit, GetBalance = getbalance}enda1 = NewAccount (0) a2 = newaccount (+) A1.withdraw (+) print ( A1.getbalance ()) print (A2.getbalance ())　　a Special "object": This can be used when the object has only a single method. It is a special case of the OOP described earlier, which is not inherited but private and efficient:function NewObj

of programming, which conforms to the normal thinking of people. If we drive a Mercedes Benz is dependent on the Mercedes-Benz, the use of laptops directly rely on notebook computers.② "Dependency inversion": programming is to abstract the real world things, and then we based on the needs of the system design to produce a dependency on the abstract, instead of people's traditional thinking of the dependence between things, called "inverted."3.2 Depen

Objective of the Object-Oriented Design Method In system design, if the design personnel can achieve the following "six", that is, modular, role-oriented, process-oriented, standardi

: Design Two tables: A storage teacher, a storage student (the most common way) Advantages: All this, the advantages of a lot of natural Cons: Some queries are somewhat difficult to implement. (e.g.: Query for new teachers and students in the last time period and sort by time) Object-oriented approach to impl

About the Great software:"Great software is always doing what the customer wants him to do," says the client-friendly program designer . As a result, customers will be able to pay the desired results even when they have a whim to use the software in new ways.The object-oriented programmer says: great software is object-orient