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server contains 3 parts: 1, a number and a text-based status code to show the success and failure of the request. 2. A collection of response headers. 3, the response body. 6.get is used for regular requests , and he applies when the URL completely specifies the request resource when the request does not have any side effects on the server and when the server's response is cacheable. The post method is commonly used in HTML forms , which contain additional data in the request body and are often

less than the number of parameters specified when the function is declared, and the remaining parameters are set to the undefined value .15. You can use the annotation/*optional*/in the function definition to emphasize that the formal parameter is optional .16, identifier arguments is a reference to an argument object, an argument object is a class array object , not a real array, it is an object that happens to have a numeric indexed property.17. The argument object also defines the callee and

First chapter CSS and documentation1. Structured HTML: (Personal understanding)1. Separation of content, style and behavior2, label semantics, what kind of label do what kind of thing3. Conform to Web standards4, the structure is clear, header, content, footer. Reduce duplicate code for the public part.2. Unstructured pages make it difficult to build content indexes, reduce accessibility, and discourage maintenance.3, the candidate style sheet, the rel attribute is alternate stylesheet, if suppo

Chapter III Structure and CASCADE1. When determining which values should be applied to an element, the user agent not only takes into account the inheritance, but also considers the specificity of the declaration, and also the origin of the declaration itself, which is called Cascading. 、2, Particularity. If an element has two or more conflicting attribute declarations, the Highest-specificity declaration wins. For the value of the attribute of each ID given in the selector, add 0,1,0,0;

Problem:A s:property tag was added to the JSP page, but the page was never displayedSolve:Learn by searching and find just adding statementsReason:@taglib indicates the reference label. Import statements similar to JavaPrefix= "s" refers to the name that can be used on the page, just like the name of an object generated in Java, and can be used directly with uri= "/struts-tags"% indicates the path of the tag library. Equivalent to import a specific classSTRUTS2 Authoritative

Maven authoritative guide Study Notes (2) posted by Ryan on 2010/05/02 leave A comment (0) Go To comments POM Pom is a descriptive statement of a Maven project. It is also a "map" that you need to understand when building a Maven project" We have determined that POM is descriptive and declarative. It does not provide explicit commands as ant or make does. We also note that the concept of POM is n

${file#*.} : Take out the first one. And the string to the left: file.txt${file##*.} : Take out the last one. And the string to the left: txt${file%/*}: Take off the last bar/its right string:/dir1/dir2/dir3${file%%/*}: Remove the first/its right string: (null value)${FILE%.*}: Take off the last one. And the string to the right:/dir1/dir2/dir3/my.file${FILE%%.*}: Take out the first one. And the string to the right:/dir1/dir2/dir3/myThis article is from the "Linux is belong to You" blog, make sur

First, IntroductionConnected to an "Android combat"----based on retrofit implementation of multi-image/file, text upload has said very much want to understand why retrofit so dick. Recently also read some of its source code analysis of the article and personally view the source code, found that the Java Network Programming and HTTP authoritative guidelines have a good interpretation. All along, have embraced a principle, in this new technology in the

ArticleDirectory Authentication Authorization Secure Communication I feel very lacking in website security, so I want to study it well, so I ran to the MS website to find information ~ Http://www.microsoft.com/china/technet/security/guidance/secmod01.mspx I learned to keep some text ~ Article 1 Construct a secure distributed Web ApplicationProgramAnd a group of important security principles to be followed The foundation fo

3640 Vswitch: Cisco 3560, Cisco 3750, and Huawei 9306 Switches 2Network Security Device Firewall:Attackers can defend against attacks from the company's internal and external networks. Cisco ASA 5505, 5510, 5520, 5540, 5550, 5580 VPNDevice:Virtual Private channel through the Internet 3And wireless network devices:Wireless Router (TP-LINK), wireless network card, Wireless Bridge 4Network device manufacturer

3640 Vswitch: Cisco 3560, Cisco 3750, and Huawei 9306 Switches 2Network Security Device Firewall:Attackers can defend against attacks from the company's internal and external networks. Cisco ASA 5505, 5510, 5520, 5540, 5550, 5580 VPNDevice:Virtual Private channel through the Internet 3And wireless network devices:Wireless Router (TP-LINK), wireless network card, Wireless Bridge 4Network device manufacturer

3640 Vswitch: Cisco 3560, Cisco 3750, and Huawei 9306 Switches 2Network Security Device Firewall:Attackers can defend against attacks from the company's internal and external networks. Cisco ASA 5505, 5510, 5520, 5540, 5550, 5580 VPNDevice:Virtual Private channel through the Internet 3And wireless network devices:Wireless Router (TP-LINK), wireless network card, Wireless Bridge 4Network device manufacturer

Chapter 2 mapreduce IntroductionAn ideal part size is usually the size of an HDFS block. The execution node of the map task and the storage node of the input data are the same node, and the hadoop performance is optimal (Data Locality optimization, avoid data transmission over the network ). Mapreduce Process summary: reads a row of data from a file, map function processing, Return key-value pairs; the system sorts the map results. If there are multi

Overseas transfer machine and chartered tour, will be overseas Network Guide service into which, not only give the network about the car is not the same connotation, but also formed and other domestic network guide of the "barrier", forming a vertical limit + vast blue sea n

2.2 Network TheoryNow that I have mentioned the protocol layer, I will discuss how the network works and some examples of how the SOCK_DGRAM package is created. Of course, you can skip this section if you think you are familiar with it. It's time to learn Data Encapsulation! It is very, very important. It is important that you have to master it in any way you study