agile software development principles patterns and practices

following code: Public class base{ publicvirtualvoid f () {/*some code* / }}publicclass derived:base{ publicoverride void f () {}}The function f is implemented in base. However, in derived, the function f is degenerate. Perhaps, derived programmers think that function f is useless in derived. Unfortunately, base users do not know that they should not call F, so there is a substitution violation.The existence of degenerate functions in degenerate classes does not always mean that the LS

run, the faster you will find any deviations from those tests. If you can run all the tests multiple times a day, the system will not expire for more than a few minutes. This is a reasonable goal. We will never allow the system to regress. Once it is working at a specific level, it must not be reversed to a slightly lower level.However, validation is only one of the benefits of writing tests. Both unit and acceptance tests are a form of documentation. Such a document can be compiled and execute

and cannot be overused. If a class has hundreds of different interfaces, some of which are separated according to the client program, others are separated by version, then the class is hard to figure out, and this kind of hard-thinking is very frightening.12.5 ConclusionFat classes can cause unhealthy and harmful coupling relationships between their client programs. When a client program asks for a change to the Fat class, it affects all other client programs. Therefore, client programs should

classshapecomparer:icomparer{Private StaticHashtable priorities =NewHashtable (); StaticShapecomparer () {priorities. ADD (typeof(Circle),1); Priorities. ADD (typeof(Square),2); } Private intpriorityfor (Type type) {if(priorities. Contains (type))return(int) Priorities[type]; Else return 0; } Public intCompare (ObjectO1,ObjectO2) { intPriority1 =priorityfor (O1. GetType ()); intPriority2 =priorityfor (O2. GetType ()); returnPriority1.compareto (Priority2);

to change.Translate into natural language description: If the coin event is received in the locked state, it is migrated to the unlocked state and the unlock function is called. If the pass event is received in the unlocked state, it is migrated to the locked state and the lock function is called. If the coin event is received in the unlocked state, it remains in the unlocked state and calls the Thankyou function. If the pass event is received in the locked state, it remain

has a separate internal thread called the active object. They appear as bold borders, as follows:18.2.6 sending a message to an interfaceExamples are as follows:Send a message to its derived type through an interface:18.3 ConclusionA sequence diagram is a tool. To be used in accordance with its design intent. Use them in front of the whiteboard to communicate with others in real time. Use them in short documents to record those core, important collaborations in the system.In the case of sequenc

After thinking about it, I decided to record the course of reading in the form of a date. The comments will be part of the discussion and Thoughts on reading. 2005-06-01: I am very happy to have time to read these good books due to my lack of project tension in the past few days. I once again picked up Agile Software Development-

is a software development engineer, training mentor and coach at thoughtworks. Patrick is passionate about creating value for his team. Patrick is also enthusiastic about those who enjoy their lives. He believes that it would be better if he could combine his favorite things with his career. Over the past three and a half years, he has guided, led, and participated in many practical

From: Agile Software Development: Principles, models, and practices: Robert C. Martin, translated by Deng Hui] Agile Software Development De

to master agile practices. The training of software development methods and processes is indispensable in the Organization. Imagine a team that does not even know what is going on with demand analysis and design, and uses agile developm