thinkful isa

Recently, jelly has discovered that several computers in the LAN are infected with viruses and are spreading over the Intranet. These viruses will not only infect machines on the Intranet, but also spread to the Internet, infect machines on the Internet, and the network bandwidth will also be heavily occupied by these viruses, as a result, LAN users cannot access the Internet to work normally. It is difficult to clear these viruses in a short period of time. Therefore, the best practice is to fi

We know that method calls in objective-C are bound at runtime. Further, the compiler will convert the object message [xxx method] To objc_msgsend (ID receiver er, Sel selector, parameter ...) . When we write code, we do not need to use this method directly. This process is converted by the compiler. The dynamic binding process in objc_msgsend is as follows: A. First find its ISA pointer through the aggreger of the first parameter, and then use the sel

objects represent classes, and class objects represent class objects. class Methods belong to class objects. * If the message receiver is a class name, the class name represents the class object. * During runtime, all class instances are generated by class objects. class objects modify the isa value of the instance to their own address, and each instance's isa directs to the Class Object of the instance. *

, represent hue, saturation% and color value, respectively.%% HSV = RGB2HSV(RGB) converts the RGB image RGB (3-D array) to the% equivalent HSV image HSV (3-D array).%% CLASS SUPPORT% -------------% If the input is an RGB image, it can be of class uint8, uint16, or % double; the output image is of class double. If the input is a % colormap, the input and output colormaps are both of class double.% % See also HSV2RGB, COLORMAP, RGBPLOT. % Undocumented syntaxes:% [H,S,V] = RG

respond to messages sent by nstime. So if you want to call the nstime message while sliding the scrollview, we can change the mode of nsunloopNSRunLoopCommonModes4. How does apple implement Autorelease Pool? Autorelease Pool function: cache Pool, which can avoid frequent relase writing. In fact, it is the delayed release, which adds the created object to the latest autoreleasePool. When the scope of autoreleasePool ends, the Reference Counter of all objects in it is-1.AutoreleaseClass Structure

Steps for easymock 1. Generate the mock Interface Iservice mockservice = easymock. createmock ("name", iservice. Class ); To use a mock object instead of an interface, use class Extension: org. easymock. classextension. easymock. If you want multiple mock interfaces, you 'd better use mockcontrol to manage them: Imockscontrol control = easymock. createcontrol (); Iservice1 mockobj1 = control. createmock (iservice1.class ); Iservice2 mockobj2 = control. createmock (iservice2.class );

Http://foredoomed.org/blog/2014/02/24/object-modeling-of-objective-c/ Objective-C is an object-oriented programming language formed by the Smalltalk message mechanism added to C. It is mainly used by Apple to develop Mac OS X and iOS operating systems. Since objective-C is an object-oriented programming language, I am interested in how the object is organized and represented in the memory, and how the message mechanism is implemented.0. nsobject The nsobject class is similar to the object class

Motherboard detection card 1. Tool Introduction The motherboard diagnostic card converts the detection process of the BIOS internal self-check program into code when the motherboard is started. It reads the code displayed on the card and compares it with the fault code table, you can quickly diagnose or locate faults in the main board, memory, CPU, power supply, and other related components. 2. Applicability Suitable for qdi, gigabyte, Microstar and other manufacturers with

Root # make all Root # make install It's easy to connect lm-sensor. Root #/sbin/depmod- Modify the file below to load the function library Root # vi/etc/ld. so. conf /Usr/local/lib add this line Root # ldconfig Root #./prog/mkdev. sh to generate the driver to support what you want to detect Root # sensors-detect: scan the chipset used by your host As long as you press Enter all the time, just wait until the following things come out according to its default value. # ---- Cut here ---- # I2C ada

] { if len (IS) >= $ { NBSP;FO R _, N: = range BS { _ = is[n]//Line 7:bounds check, not smart enough. } }}func fd2 (is []int, BS []byte] { if len (IS) >= $ { NB Sp is = is[:256]//Line 14:bounds check. A hint for the compiler. for _, N: = range BS { _ = is[n]//Line 16:bounds CH Eck eliminatd! } }}func Fe (Isa []int, ISB []int) { if len (ISA) > 0xFFF { nbsp for _, N: = range ISB {

First, in OC about the object model, there are five basic concepts, object (instance), Class (Class), Metaclass (Meta Class), Rootclass (Root Class), Rootclass ' s metaclass (root element Class)Second, each object has a hidden Isa pointer, pointing to class, and the object structure is as follows:typedef struct OBJC_CLASS *class;typedef struct OBJC_OBJECT {Class Isa;} *id;Thirdly, each class structure is as

, respectively.%% HSV = RG B2HSV (RGB) converts the RGB image RGB (Z-array) to the% equivalent HSV image HSV (in-z array). Percent CLASS support%--- ----------% If The input is a RGB image, it can be of class uint8, uint16, or% double; The output image is of class double. If the input is a percent colormap, the input and output colormaps is both of class double.%% see also Hsv2rgb, ColorMap, Rgbplot. % undocumented syntaxes:% [h,s,v] = RGB2HSV (r,g,b) converts the RGB image r,g,b to the% equiva

Python has two ways of formatting strings, using% or using the built-in format () function.Format a string with%Use% in Python to format the string, with a usage and effect similar to% in the C language. The format is:% specific conversion type %data.The following are common types of conversions %s String %d Decimal integer %x hexadecimal integer %o Eight-binary integers %f Decimal floating-point

Runtime is a very interesting thing, if you learn iOS development very often will use or be asked to runtime. So what is runtime and how to get to know it.Runtime: Chinese name runtime, the system in the compilation of some of the types left, the operation in the run time to analyze the dynamic, processing, which also shows that object-c is a dynamic language. (Swift differs from that, although Swift can be called OC's runtime, but Swift itself is a static language.) But by being able to interac

as a normal reference. Such as: Copy Code code as follows: subnamelister{ My$this=shift; My ($keys, $value); while (($key, $value) =each (% $this)) { print "\t$keyis$value.\n"; } } Second, the output of the Perl method If you want to refer to the COCOA.PM package now, you will get a compile error saying that the Perl method was not found because the cocoa.pm Perl method has not yet been exported. The output Perl method requires the exporter module, with th

Now many companies are using Microsoft's Active Directory to manage the network, in which the internal DNS server is an integral part. We know that when ISA Firewall client accesses network resources through ISA, its DNS resolution is done by ISA Server, and if you have any idea, the combination of internal DNS server and Firewall client can skillfully solve many

// Syntax ganlu: varobject // defines the basic classes of lower-case objects, used to implement the most basic methods and so on {isA: function (aType) // a basic method for determining the relationship between classes and between objects and classes {varselfthis; 32 while (self) {if (self... syntaxHighlig // Syntax:Var object = // defines basic classes of lower-case objects for the most basic methods.{IsA

Article Title: RouterOS2.8 hardware driver list (1 ). Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. Device Driver List Document revision: 2.8 (Wed Oct 13 11:39:39 GMT 2004) Applies: MikroTik RouterOS V2.8 General Information Summary The document lists the drivers, included in MikroTik RouterOS and the devices that are tested to

, just use this. [What happens when a message is sent to a nil object in ※※]OBJC?] Nothing will happen. The answer is very detailed: http://blog.csdn.net/hanangellove/article/details/45013581 The specific reasons are as follows: OBJC are dynamic languages, and each method is dynamically converted to a message at run time, i.e.: objc_msgSend(receiver, selector) . So, to facilitate understanding of this content, or paste a OBJC source code:

simple invocation. Runtime at compile time will convert the above code into 1 objc_msgSend(obj,@selector(makeText)); First, let's take a look at the Obj object, which is inherited from NSObject in iOS. 123 @interfaceNSObjectClassisaOBJC_ISA_AVAILABILITY;} There is a class Isa pointer in the NSOBJCET. Then we look at class: 1234567891011121314 typedefstructobjc_class*Clas