lot of code? It's easier to have a similar drink in the future, to prevent a lot of repetitive code coming up.In fact, the above is using template method design mode In the example above, the template method is Preparereceipe ().The Caffeinebeverage class dominates the algorithm flow of coffee and tea, and the reuse of the code is almost maximized, adding that t
structure, the "Hollywood Rule": "Don ' t call Me,i will calls you.", that is, a parent class invokes the operation of a subclass, not the other way around.(3). The type of the template invoke operation has specific operations, specific abstracclass operations, primitive operations, factory methods, hook operations. The primitive operation is less defined.(4). The name of these redefined actions in Android likes to prefix the method with a suffix on.
) The behavior is controlled by the parent class, and the subclass implements4. Disadvantages(1) The execution result of the subclass affects the parent class, which affects the readability of the code.5. Usage Scenarios(1) Multiple subclasses have public methods, and the logic is basically the same(2) important, complex algorithms, can be the core part of the design as a template method, the surrounding re
Template mode
The template design pattern creates an abstract object that implements a set of methods that the subclass typically uses as a template for its own design.
Design Scenarios
Typically used for database abstraction cl
Study Notes on design patterns (14)------ Template Method(Template Method) Mode
Gof:Defines the skeleton of an algorithm in an operation, and delays some steps to the subclass. The template method allows the subclass to redefine certain steps of an algorithm without changing the structure of an algorithm.
Inheri
Las vegas\n '; }} 5. Summary Template method pattern is an inheritance-based code reuse technique, and the structure and usage of template method pattern are also the core of object-oriented design. In the template method pattern, you can put the same code in the parent class and put different method implementat
this is Bwar in 2009 to write the design pattern C + + implementation, code can be compiled to run, has been existing in their own computer, has been sharing in the team technology sharing, is now moving to the line. 1. Template Method Brief1.1 PurposeDefines an algorithm skeleton in an operation, and delays some steps into subclasses. Templatemethod allows subclasses to redefine some specific steps of the
parts can continue to be extended by inheritance.2. Extract the public part code for easy maintenance.3. The behavior is controlled by the parent class, the subclass is implemented, the basic method is implemented by subclasses, so the subclass can increase the corresponding function by extending the method, and conform to the open and closed principle.Template Method Pattern disadvantageThe template method pattern reverses the reading order, and we
People who have used Zabbix know that a variety of monitoring projects are based on the template, and then they also imitate to do a monitoring system
Draw a diagram first, is the template diagram of the future design monitoring system650) this.width=650; "src=" Http://s2.51cto.com/wyfs02/M01/7C/A4/wKioL1bU7MKwx7aiAABFiFf9gak452.png "title=" QQ picture 20160301
Template method Mode:Defined:Defines an algorithmic framework in an operation, and delays some steps into subclasses. Enables subclasses to redefine some specific steps of the algorithm without altering the structure of an algorithm.The template method pattern is very simple and only uses the Java inheritance mechanism, but it is a very wide application pattern.In a software development project, if the same
Statement: This series of blog reference "Big Talk design mode", author Geoscience.
The template schema prepares an abstract class, implements some of the logic in concrete ways and concrete constructs, and then declares some abstract methods to force subclasses to implement the remaining logic. Different subclasses can implement these abstract methods in different ways, thus having different implemen
objects of the generic concept. Technically, it is actually a set of rigorous "Concepts" classifications. Here, the so-called concepts has a serious definition, which means "some condition requirements for a certain type 」. The models that meet these conditions is called the concepts. STL concepts does not actually correspond to anything in C ++ or other languages.---------------------------------------------------------------
For C ++ programmingGeneric programming is STL programming.-------
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The template is no stranger to students studying C ++. Functions include template functions and templates. So what is the template mode? We can think about the nature of the template
1. The SUMMARY
In this article, we have a comprehensive understanding of the template method pattern.
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Template method ModeDefines the skeleton of an algorithm in an operation, and delays some steps into subclasses. The template method allows subclasses to redefine some specific steps of the algorithm without altering the structure of an algorithm. Popular is that there are a lot of the same steps, in some places there may be some differences suitable for this mode, such as the big talk
indeterminate steps in the template function are replaced by abstract functions; When the client wants to use this template function, it needs to create a subclass and override the abstract function of the abstract class.When to use?When a similar function is used in more than one place, it is common practice to copy the code and change some places slightly. The reuse rate for this practice code is too low
A joke says: How many steps does it take to put an elephant into a refrigerator?
One, open the refrigerator
Two, put the elephant in
Three, close the refrigerator
In the same vein, how many steps does it take to put a lion in the freezer?
One, open the refrigerator
Two, put the Lions in
Three, close the refrigerator
In the above example, do you find that the two methods have a common step, but the specific implementation is slightly different, in short, these two types of behavior can share a s
This article continues to introduce the template method pattern of 23 design pattern series. OverviewThe template method pattern is the behavior pattern of the class. Prepare an abstract class, implement some of the logic in the form of concrete methods and concrete constructors, and then declare some abstract methods to force subclasses to implement the remainin
Template design Pattern Definition:Defining the skeleton of an algorithm in an operation, and delaying some steps into subclasses, the template method allows subclasses to redefine some specific steps of the algorithm without altering the structure of the algorithm.The popular point of understanding is: To complete one thing, there are a fixed number of steps, bu
Reprint Please specify source: http://blog.csdn.net/lmj623565791/article/details/26276093Continuous design Mode ~ Template Method modeOld routines, look high definition: It defines the skeleton of the algorithm. Although some of the steps are deferred to the child class. Without changing the algorithm structure. The steps to define the algorithm again.Simply look at the definition, the
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