understanding netflow

(pSpatialFilter, True) Use Cursor to access records Now you have a good understanding of the general mechanism for generating cursor. Let's see how to use a cursor to access the returned records. Remember, cursor is a set of records from only one table or element class in memory. When a cursor is generated for the first time, an associated pointer is also generated. You can use a cursor to access a row of records at a time. This pointer helps you tra

The following things are not what I have created. They are the essence of some books I think. After learning about JavaScript, I feel that my understanding of JavaScript has been further improved, find out something that is also known as a trick or a trick. I will apply this knowledge to a new framework. The goal of the new framework is to use js to display various charts. Although there are already many frameworks with this function, however, I think

Understanding the emulator's limitations Although the new simulator keeps up with the development of devices and ensures high-fidelity simulation of devices and the convenience of developers, each simulator has some limitations when simulating real devices. The smartphone code run by the simulator in the smartphone SDK is compiled for the x86 CPU. In most major application development scenarios, this is enough to meet the requirements. However, this t

Coredata first class understanding coredata, coredata first class understandingProblem There are many ways to persistently store data in iOS/Mac: NSUserDefault, Key chain, C language file interface, NSFileHandle, write method in basic framework, archive, and so on. In practical applications, we often need to convert the data into objects in a certain format, and perform certain filtering and other operations before using them, which is not very conven

forced conversion operation to convert it to object. Forced conversion does not change B object, but your B object view limits the data and behavior to. After B is forcibly converted to a, the can be forcibly converted to B. If Class B is used as Class B, data and behavior of Class A and Class B can be obtained at the same time. Objects can represent multiple types of capabilities called polymorphism. by understanding these concepts, you can define

ASP. NET is a very powerful platform for building Web applications. It provides great flexibility and capabilities that can be used to build all types of Web applications, as ASP. NETProgramPersonnel, should have a deeper understanding of its working principles. This period of time in the domestic and foreign network for verification and understanding to summarize, collect and sort out and when the programC

Transferred from: http://kb.cnblogs.com/page/539838/In the previous article, we discussed what a schema is. In fact, these basic concepts are very important for architecture, and most people think they are aware of the concepts they are accustomed to every day, but in fact they are subconscious and not active. For example, "What is a table?" "When I do training, I often take this example to ask you, answer all sorts of strange things." This actually led to the structure of the time, the differen

Deep understanding of PHP kernel (3) Overview-SAPI overview, deep understanding-sapi. In-depth understanding of PHP kernel (3) Overview-SAPI overview, deep understanding-sapi this article link: www. orlion. ml2341. in various stages of the PHP lifecycle, some service-related operations are implemented through a thoroug

Contact the front end has several years, but, to tell the truth, for CSS the understanding really is not to compliment, I believe many colleagues also have similar feelings! What is this for? Because we all think CSS too simple, there is no need to study deeply, if so? In fact, it is only the Tucson of their own drawings. If it's really that simple, why do you often encounter some strange style problems and toss them for a long time? is because of the

A deep understanding of the count function of PHP array and a deep understanding of count. A deep understanding of the count function of PHP arrays, and a deep understanding of the countcount () PHPcount () function is used to calculate the number of cells in an array or the number of attributes in an object, returns t

In-depth understanding of PHP kernel (6) function definition, passing parameters and return values, and in-depth understanding of the kernel. In-depth understanding of PHP kernel (6) function definition, passing parameters and return values, and in-depth understanding of kernel 1. function definition the user function

A deep understanding of the CSS box model and a deep understanding of the css box Http://www.chinaz.com/design/2010/1229/151993.shtml. Source: http://www.sitepoint.com/web-foundations/css-box-model/ Links mentioned in this article: Floating and Clearing in CSS Collapsing Margins When I was working on a project a few times ago, I encountered a small problem in page layout, so I went to stackoverflow for help

Understanding javascript prototype and closure (15)-closure and understanding javascript In addition to understanding the context and scope, we also understand the basics of closures. As for the literal description of the concept of the word "closure", it is really hard to explain. I have read it many times, but I still can't remember it. However, you only need t

Understanding javascript prototype and closure (16)-conclusion and understanding javascript I used a total of 15 articles to prototype and closure javascript. First, javascript is "not easy to learn ". It is not how difficult it is, but the people who learn it often learn javascript after learning other languages. With the learning experience and practical experience of other languages, coupled with self-ta

In-depth understanding of PHP opcode principles, in-depth understanding of opcode This article describes the principle of opcode in PHP. Share to everyone for your reference, as follows: OpCode is a PHP script-compiled intermediate language, like Java's bytecode, or. Net of MSL. This article is mainly based on "understanding OPcode" and the network, according to

Deep understanding of JVM Reading Notes Mind Map, deep understanding of jvm Reading Notes To prove that I have completed this book and bought a new book, I don't have to worry about it... After 8 minutes of brain image, I feel that the entire person is not good. T_T brain cells do not know the number of dead cells... In fact, it is not thoroughly understood. It is estimated that we will open it again in a f

In-depth understanding of javascript prototype and closure (18)-addition: Relationship between context and scope, and in-depth understanding of javascript This series uses a lot of space to explain the context and scope, and some people reflect that these two are one thing. This article uses a small example to illustrate that the scope and context are definitely not the same thing. Let's look at the differ

A deep understanding of one jvm [memory region] and a deep understanding of the jvm Region Before the beginning of this article, we need to declare that this series of articles discuss the hot spot VM. Most of the ideas in this article are based on Zhou Zhiming, who deeply understands the Java VM: JVM advanced features and best time. if I have any misunderstanding, please correct me. Before you start to ex

Deep understanding of the PHP kernel (i), in-depth understanding of the PHP kernel As a simple and powerful language, PHP provides many of the language features that are available to the Web. From the practice, after the weak type variable principle research, this article continues to lead everybody to understand the PHP kernel deeply. Recently, when I was talking to a netizen, I raised a very strange ques

A deep understanding of Spring's transaction Propagation Behavior and a deep understanding of spring transactions Preface Spring defines seven types of transaction propagation behaviors in the TransactionDefinition interface. Transaction Propagation Behavior is a unique enhancement feature of the Spring framework. It does not belong to the actual provider database behavior of transactions. This is a powerfu