kanban categories

Understanding the cursor (2) Introduction to the attribute of the cursor and Case Study of Different cursor categories links: Understanding the cursor (1): Overview of the cursor http://www.bkjia.com/database/201212/177395.html PL/SQL provides six types of cursor attributes: The cursor attribute www.2cto.com Name Description Example % FOUND returns true if the record is obtained successfully; otherwise, returns false begin update t set name = 'F' wher

We found that slowly accumulated a lot of their own written in various categories.。 Today, selfless. Posted1.NSDateFomatter@interface NSDateFormatter (mycategory) + (ID) dateformatter;+ (ID) Dateformatterwithformat: (NSString *) dateformat;+ ( ID) defaultdateformatter; @end@implementation NSDateFormatter (mycategory) + (ID) dateformatter{ return [[Self alloc] init];} + (ID) Dateformatterwithformat: (NSString *) dateformat{ NSDateFormatter *datef

the stored data, but SRAM does not need it. DRAM has a long access clock interval, while SRAM is fast and time-consuming. DRAM consumes low power, high power consumption of SRAM. At present, the price of the same capacity of SRAM is about 8 times that of SDRAM, and the area is nearly 4 times larger. Therefore, SRAM is often used for fast storage of low-capacity Ram requirements, such as cache (cache ), for example, the L1 cache in the CPU and the L2 cache on the motherboard are usually only sev

Label: Objective C Category-by using categories, we can dynamically add new methods to existing classes, and modularize the class definitions without being divided into multiple related files. Generally, a method is defined only in a category. 类别，接口部分的定义,通常该文件命名为已有"类+类别名.h"@interface 已有类 （类别名）//.......方法实现@endFor example, if you want to add a category to nsnumber, the interface code is as follows: The implementation of this class is as follows:

Categories allows you to add new methods for a class (you cannot add new data members), instead of using inheritance methods. In addition, you can do this even if there is no implementation source code for a class. Example:I. Example 1:Add several math methods for Fraction without using the fraction source code.1. Code:Put the previously compiled fraction. O and fraction. h in the same directory as the following file. For example, here is the fraction

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