they will not use, should group the methods in the Fat interface, and then replace it with multiple interfaces, each serving a submodule. To put it simply, it is much better to use multiple specialized interfaces than to use a single interface.
The main points of view of ISP are as follows:
1) The dependency of a class on another class should be based on the smallest interface.
ISPs can achieve the ability to not force customers (using methods of interfaces) to rely on methods that they do not
types. The so-called Operation name Polymorphism refers to the ability to pass different messages to the operation in order for the object to produce certain behavior based on the corresponding message.two or seven major principles7 Basic principles: the single-duty principle SRP (unitary Responsibility Principle), the open-closure principle OCP (Open-close Principle), the principle of substitution, the principle of dependence (the Dependency Inversi
Today, I have posted all the five object-oriented design principles (SRP, OCP, LSP, dip, and ISP) that I have organized some time ago. I hope they will help you, I also hope to have more exchanges with you.
General principles (from: Design Patterns explained ):
1. design to interfaces.
2. Favor composition over inheritance.
3. Find what varies and encapsulate it.
1. Single Responsibility Principle-SRP
elegant SOLID design principle to prevent someone from modifying the tested code. Ideally, if you have added new features, your code needs to be tested, which is the goal of enabling/disabling design principles. By the way, the "O" letter in SOLID refers to the principle of opening/closing the design.Single Responsibility Principle
Single Responsibility Principle (SRP)
The single responsibility principle is another SOLID design principle. The SOLID l
1. SDR descriptionSpring Data Redis (SDR), a set of simplified access to Redis APIs provided by Springframework, is another layer of encapsulation for Jedis.The SDR integrates the four open-source Redis Connector of Jedis,jredis,srp,lettuce, all of which are open source Java libraries for Redis. Among them, Jredis and SRP start from spring-data-redis1.7, it is not supported.2, Redistemplate descriptionRedis
programs load class program files under the app directory
One application is easy to handle. What should we do with a bunch of applications? The following describes the directory structure of multiple applications.
3. directory structure (anti-aging is important)
The design concept of PHP is rare, and there is no concept of a package. We had to use the directory to package the concept. Describes the functions of the directory structure from the access structure, development structure, and deplo
substitution principle, interface isolation principle and dependency inversion principle. These principles are mutually supportive and are one of the best common design methods you can use for your code. Let's take a look at each one of them.The single Responsibility principle (SRP) is the most important principle of the organization. It points out that each module should have only one responsibility and reason to change. The
/closing the design principles. By the way, the letter "O" in solid refers to the principle of open/close design. Single principle of responsibility Single Responsibility Principle (SRP) The single principle of responsibility is another solid design principle, and the letter "S" in solid refers to it. According to the SRP, the reason for a class modification should be one or the other, or a class should alw
The Spring-data-redis Project (SDR) provides a higher level of abstraction for Redis's Key-value data store operations, similar to the spring framework for JDBC support.Project home: http://projects.spring.io/spring-data-redis/Project Document: http://docs.spring.io/spring-data/redis/docs/1.5.0.RELEASE/reference/html/This article mainly introduces the actual use of spring Data Redis.New features of 1.Spring Data Redis 1.5Added the Redis hyperloglog command pfadd,pfcount,pfmergeYou can use Jackso
object-oriented implementation of the symbolic design system that constructs the system as a "real-world" object in a way that is very close to the problem domain terminology, focusing on how to doit, Implement functional specifications through the model. OOP is coded in a programming language (such as Java) on a design basis . The main line that runs through OOA, Ood, and oop is abstraction. (iii) Preliminary design pattern (1) S.O.L.I.D principleObject-oriented three elements are "encapsul
=" 3ebaa89c5e14ed66f7669aea729dc5ed.png "/>The key to efficient ARP operation is because there is an ARP cache on each host. This cache holds a mapping record between the closest Internet address to the hardware address. The lifetime of each entry in the cache is typically 20 minutes, starting from the time it was created.ARP Request packet sample:#!/usr/bin/python3.4#-*-coding=utf-8-*-importlogginglogging.getlogger ("Scapy.runtime") . SetLevel (Logging. ERROR) #清除报错from scapy.allimport* #配置各种信息
required by the application, rather than trying to add any other functionality that you think might be required. Test-driven Development (TDD) is a design methodology that adheres to the Yagni principle. The purpose of TDD is to write tests to verify the functionality of the system, and then just write the code that allows the test to pass.5. Isolate the point of interest (SoC)The SOC process breaks down software into a number of different functions, each of which encapsulates unique behaviors
Objective
Uncle Bob proposed and carried forward the five principles of S.O.L.I.D for better object-oriented programming, the Five Principles are:
The single Responsibility principle (SRP for sole responsibility)
The open/closed principle (opening and closing principle OCP)
The Liskov substitution principle (on the Richter replacement principle LSP)
The Interface segregation principle (ISP for interface separation principle)
The Dependency inversion
Iterative 4 is loosely coupled with design patterns
This iteration
This is the fourth iteration of the Contactmanager, and in this iteration we will refactor the application to loosely decouple its coupling with a reasonable use of the design pattern. Loosely coupled programs are more resilient and easier to maintain. When an application is faced with changes, you only need to modify one part of the code without a large number of changes to the far-reaching of the associated code that is heavi
Install the Windows 2003 Enterprise Server, set the password for the administrator, and set the full domain name (such as dom851.acme.com)
Install network card, insert network cable, set IP
Verify domain name can be used: Ping dom851.acme.com
Install Domino 8.5.1, install Chinese language packs, start Domino for configuration Setup,setup Select HTTP service and DIIOP service, default Domino administrator for administrator, start Domino
Verify Domino Installation:
Http://dom851.acme.com/names.n
to achieve polymorphism. polymorphism refers to the phenomenon that different class objects will execute different code when they invoke the same signed member method. Polymorphism is the basis of the flexibility and extensibility of object-oriented programming .(iii) Preliminary design patternObject-oriented three elements are "encapsulation, inheritance, polymorphism", and any object-oriented programming language will support these three elements syntactically. It is very difficult to use t
by these operations must be different. The so-called operation name polymorphism means that you can pass different messages to the operation so that the object produces a certain behavior according to the corresponding message.Two or seven large basic principles7 Cardinal principles: the principle of sole responsibility SRP (single responsibility Princ iple), the open closure principle OCP (Open-close principle), the principle of substitution, the pr
. Won ' t is able to use Psdump () or Pdfdump ().
Warning:no Route found for IPv6 destination:: (No default route?)
Welcome to Scapy (2.2.0)
>>> Help (send)
Most of the time, if you see something you don't understand, please use help. The second is the official reference manual.
Basic Syntax ip/tcp/http packet manipulation
>>> IP () Packet sending
Packet delivery mainly includes the following functions SEND/SENDP/SR/SR1/SRP The main differences are:
python3+scapy scan gets LAN host IP and Mac
'
python3 install scapy-python3
Note: Linux may need to log in as root to avoid permission error
Scapy also contains built-in function arping (), The function implements a function similar to the above two commands:
arping ("192.168.1.*")
' from
scapy.all import SRP, ether, ARP
ipscan = ' 192.168.114.1/24 '
try:
Ans,unans = SRP (ether (dst= "FF:FF:FF:FF:FF:FF
The Spring-data-redis Project (SDR) provides a higher level of abstraction for Redis's Key-value data store operations, similar to the spring framework for JDBC support.
Project home: http://projects.spring.io/spring-data-redis/
Project Document: http://docs.spring.io/spring-data/redis/docs/1.5.0.RELEASE/reference/html/
This article mainly introduces the actual use of spring Data Redis.
New features of 1.Spring Data Redis 1.5
Added the Redis hyperloglog command pfadd,pfcount,pfmerge
You can use
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