iab categories

The six-class cabling system provides a high-speed bandwidth of 2.5 times higher than that of the five categories, and a ACR value of 300% times higher than that of the five categories at MHz. In terms of construction and installation, Category 6 is much more difficult than Category 5.Construction personnel of cat6 cabling systems must comply with international standards. "The more advanced copper cables ar

protocol imagetouchdelegate # Import "imagetouchview. H" // Place the protocol name in the angle brackets behind the parent header. If multiple protocols exist, separate them with commas (,). @ Interface photoonshotviewcontroller: uiviewcontroller } @ End The following describes how to implement the Protocol definition in the. m implementation file of the class. # Import "photoonshotviewcontroller. H" @ Implementation photoonshotviewcontroller // Implement the methods defined in the P

Avoid Properties in CategoriesThe OBJECTIVE-C classification is not allowed to increase the member variable (Instance variables May is not is placed in categories), we can use the runtime function objc_setAssociatedObject and objc_getAssociatedObject to let the classification support to save and get some data, This supports attributes.eocperson+friendship.h@InterfaceEocperson (Friendship) @property (nonatomic, strong) nsarray *friends;@end//eocperson+

"Local Variables" (local variable)1, defined in a function, the scope is only within the scope of this function.2, defined in a compound statement, the scope is only in the compound statement."Global Variables" (Globals variable)#定义在函数之外, the scope begins with the definition of the variable to the end of the source file."Local variable with the same name"#不同作用域的同名局部变量, do not interfere with each other, in memory is in different storage space."Local variable has the same name as global variable"#

On the data mining this course, want to make a small example. The basic idea is to open the corresponding URL according to the configuration file, and then automatically select the appropriate article according to the content classification information to save. Take into account the efficiency, multi-threaded approach. To complete a basic framework. This includes reading configuration files, opening URLs, saving files, and many more work, parsing pages, analyzing

Articles of different topics are categorized into different categories, helping visitors find what they want and improve the user experience. Therefore, it is necessary to create an article classification for your website. So, how does the WordPress system create and manage article classifications? Let's introduce a brief introduction to today's initiative.Before creating a classification, it is best to have a clearer idea of the content orientation o

1. Why should I have a category? Extending on the basis of existing classes can be implemented using both inheritance and composition, but why does OC have to have categories like this?Consider a scenario where a dictionary is created, key is a string, and value is the length of the string. The general practice is to: Nsmutabledictionary *dict = [nsmutabledictionary dictionary]; nsstring* str = @ "Hello"; nsnumber* NUM1 = [nsnumbe

Inherit application: There are several classes when they have some common properties, they can declare a parent class, inherit it. Simplify the code.Category:1, which can be used to write code in chunks.2, expand some system classes. Super powerful.3, some common methods can be extracted into the nsobject category, because all classes inherit from NSObject, so all classes will have this method, can simplify the code. Generic, add a category to the parent class, and there will be methods in the c

What are the two categories of Linux? -- Linux general technology-Linux technology and application information. For details, refer to the following section. Hello everyone, I am a newbie. I read some articles about Linux and learned that Linux is divided into two categories: RPM and Deb. I use Ubuntu in Deb class, and Fedora in RPM class. Ubuntu can install the Deb package and source code package (* .tar

1.includes\lib_goods.php, add a few function at the very end/** * Get sub-categories under the specified category * * @access public * @param integer $cat _id category number * @return array */function get_children_tre E ($cat _id) {if ($cat _id >0) {$sql = ' SELECT count (*) from '. $GLOBALS [' ECS ']->table (' category '). "WHERE parent_id = ' $cat _id '"; if ($GLOBALS [' DB ']->getone ($sql)) {//Gets the current class name and its subcl

Three major functions of the category1. Add methods to existing classes, you can increase the object method, or you can add static methods.If the added method is a method of this kind, then this method may overwrite the original method or it may not overwrite it.Categories can only increase the methods of existing classes and cannot increase the properties of the class2. Declaring a private methodYou can use categories to implement the declaration of

Java OutOfMemoryError commonly encountered in two categories, respectively, prompted: "Java heap space" and "PermGen space", the front refers to the Java memory is not enough, after the exception refers to the load class of memory is not enough, Corresponds to heap memory and non-heap memory (JVM's own memory). These two exceptions are resolved in different ways:java heap space resolves: the java run parameter is: "-XMX4G" to increase the value, the d

All kinds of errors are encountered during the network data exchange.These network errors are from the client or the server.Let's comb it out:We divide the error into three major categories Operating system error HTTP request Error Application Error 1. The operating system error is due to the fact that the packet did not reach the intended target, which could be caused by: No network-no network connection Cannot be r

. Cache.delete ('Category_keys') #get an auto-Grow ID@classmethoddefGETINCR (CLS):returnInt (CLS.CACHE.INCR ('Category_cateid')) +Db_auto_insert#Add categories to the list by hierarchy@classmethoddefAdd (cls,num,catename): ID=cls.getincr () cls.insert_db (id,num,catename) Cls.cache.sadd ('Category_keys','Category_level_'+str (num)) Cls.cache.lpush ('Category_level_'+str (num), Json.dumps ([Id,catename] )#Get parent class@classmethoddefGetparent

CSS selectors can be broadly divided into 10 broad categories:1, element selector such as: p{}2, class selector such as:. xx{}3. ID selector such as: #xx {}4, association selector such as: P a{}5, child element selector such as: p>a{}6, adjacent sibling selector such as: p+a{}, matching is adjacent to the P element behind the A element7, combination selector such as: p,a{}8, Element selector such as: Img[alt], matching the IMG element containing the A

Java's data types fall into two categories: basic types and reference types;The basic type can only save some constant data, the reference type can save the data, but also provide the function to manipulate the data;In order to manipulate the basic types of data, Java also encapsulates them, getting eight classes, which are the basic types of encapsulation classes in Java, respectively:Eight basic types: byte short?? Int? Long float double?? Char?? Bo

Categories of PythonPython has Jpython,cpython and so many other classesSince Python has been a fire in recent years, it has been very useful in many fields, such as AI, so different companies are starting to create their own python, the Python language they created has been compiled into java,c# and other languages, and the underlying language of java,c# and other high-level languages is C.We can tell that CPython performs the most efficiently, and w

just so two methods, which because the Array_pop will change the array of pointers each time, so you can reset the array at the end of the loop reset. The final test, input is the ID of two categories, after the completion of the function, the returned array is the ID of all subcategories, if we want to call the specified category of products and get sub categories and the number of products to achieve th

Package | tutorial | Chinese 1. Program members for categories (Procedure member) The task of Class (class) is to organize and encapsulate information (data) and programs (Procedure). The category tells the computer:"that the object should contain those data, and that it should contain those programs to deal with the outside message. The class shall specify its information and procedures, which we refer to as the "data member" of the category, which

Tags: block basic nbsp Direct Learning TOC Statement Lap indirectThe SQL language is divided into four categories: Data Query Language DQL, Data manipulation language DML, data definition language DDL, Data Control Language DCL.1. Data Query Language DQL The DQL basic structure of the data query language is determined by the SELECT clause, the FROM clause, whereclause consists of a query block:SELECT From WHERE 2. Data manipulation lang