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
Design Mode: Template Pattern-conversion, templatepatternTemplate Mode
The template method mode defines the skeleton of an algorithm in a method, and delays some steps to the subclass. The template method allows subclass to redefine some steps in the algorithm without changing the algorithm structure.
Examples of usin
PHP design mode-template Mode
In the template mode, prepare an abstract class, implement part of the logic in specific methods and construction forms, and declare some abstract methods to force the subclass to implement the remaining logic. Different sub-classes can implement these abstract methods in different ways to implement the rest logic differently. Firs
Turn http://www.jellythink.com/archives/407In Gof's design model: The basics of reusable object-oriented software, the template method pattern is said to define an algorithmic skeleton in an operation, while delaying some steps into subclasses. Templatemethod allows subclasses to redefine some specific steps of the algorithm without changing the interface of an algorithm.I'll combine this
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
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
Business requirements to implement a domain algorithm
Solution Solutions Template method mode, 2 characters:
Template class-Specification algorithm skeleton, encapsulation basic method, template method and Hook methodWhere the template method should be defined as final, preventing subcla
header file.
Example 10-1 reads a few integers from the standard input, stores them in a vector container, and outputs their opposite number.
STL Program ExamplesAn implementation of the transform algorithm:Template
The transform algorithm sequentially traverses the elements pointed to by first and last two iterators;
The value of each element as an argument to the op of the function object;
Outputs the return value of the OP through the iterator result sequence;
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
Template method is better understood, is to avoid code redundancy, implementation of code to take the function. For example, the most common tea and coffee, two have a lot in common, all need to boil water, all need to pour into the cup, then these repeated methods can be drawn out, placed in the parent class, as for the different methods, write an abstract class, so that different subclasses to rewrite the parent class.CodeTemplate classPackage
template method pattern:1, good package 2, good reuse, 3, shielding details 4, easy to maintainAs for the disadvantage, it is the inheritance problem, in Java can only inherit a parent class.Process: Analyze scenes---step----Refactor code--important, complex algorithms, core algorithms designed as templatesNote the point:Template method needs to be declared as public finalThe private method is the basic logicProtect abstract method is an extensible m
Although art is divided into independent fields, there are always similarities. Ui/ux design is also a kind of art, like art, Ui/ux's design also need a lot of copying other excellent works to improve their level.But as the saying goes: "Tiger", if you copy the object is not appropriate, it is likely to have its shape and not its meaning. So, where to find the right copy material, to do "Tiger painting Tige
1. The SUMMARY
In this article, we have a comprehensive understanding of the template method pattern.
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3. Straight to the point
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
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
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