he objective c 2 0 programming language

... with a short intsize of 16 bits: w1 0000 0000 0001 0101 0x15 w2 0000 0000 0000 1100 & 0x0c ——————————————————————————————————— w3 0000 0000 0000 0100 0x04 Bitwise ANDing is frequently used ... w1clusive-ORed with w2would be hexadecimal e8, as illustrated:Ex-w1 0000 0000 0101 1110 0x5e w2 0000 0000 1011 0110 ^ 0xd6 ———————————————————————————————————— 0000 0000 1110 1000 0xe8 The ... is shown next hexa-w1 0000 0000 0001 1001 0x19 w2 0000 0000 0110 1010 | 0x6a ————————————————————————————————————— 0000 0000 0111 1011 0x7b Bitwise Inclusive-ORing, frequently called just bitwise

Ngày tải lên: 12/08/2014, 23:22

... Program 8.5 Output Origin at (100, 200) Origin at (50, 50) You changed the XYPoint myPoint from (100, 200) in the program to (50, 50), and apparently it also changed the rectangle’s origin! But why ... myPoint to (100, 200) .After setting the width and the height of the rectangle to 5 and 8, respectively, you invoked the setOrigin method to set the rectangle’s origin to the point indicated by ... the system searches up the hierarchy for a method to apply to an object. If you have methods in different classes with the same name, the correct method is chosen based on the class of the receiver

Ngày tải lên: 12/08/2014, 23:22

... is notgood programming practice category can exist in a given Objective-C namespace.This can be tricky because the jective-C namespace is shared between the program code and all the libraries, ... Any class can You can check to see whether an object conforms to a protocol by using the conformsToProtocol:method For example, if you had an object called currentObject drawing messages, you could ... Protocolobject, which is what the conformsToProtocol:method expects as its ment argu-You can enlist the aid of the compiler to check for conformance with your variables byincluding the protocol

Ngày tải lên: 12/08/2014, 23:22

... copyStringfunction is called twice—the first time to copythe contents of string1intostring2, and the second time to copy the contents of theconstant character string “So is this.” into string2 2 Note the ... stored char-When the frompointer points to the null character, the forloop is exited.The functionthen places the null character at the end of the destination string In the mainroutine, the copyStringfunction ... value contained in the integerthatp2points to Because p1points to i1, and p2toi2, the function exchanges the values respec-ofi1andi2.The output from the second NSLogcall verifies that the exchange

Ngày tải lên: 12/08/2014, 23:22

... the accessor methods for you Consider the second version of the sys-AddressCardinterface file: Trang 6lists the attributescopyandnonatomicfor the properties.The copyattribute says to makea copy ... AddressCard *card1 = [[AddressCard alloc] init]; AddressCard *card2 = [[AddressCard alloc] init]; AddressCard *card3 = [[AddressCard alloc] init]; AddressCard *card4 = [[AddressCard alloc] init]; ... AddressCard *card1 = [[AddressCard alloc] init]; AddressCard *card2 = [[AddressCard alloc] init]; AddressCard *card3 = [[AddressCard alloc] init]; AddressCard *card4 = [[AddressCard alloc] init];

Ngày tải lên: 12/08/2014, 23:22

... releasemessage to the object As you can see, its referencecount then goes from 3back down to 2 Because it’s not 0, the other references to theobject (from the array and through myInt2) remain valid.The system ... NSMutableStringclass, indicating that the string’scontents might have changed during the course of the program’s execution And becauseconstant character strings can’t have their contents changed, the system ... its referencecount down to2.The release of the autorelease pool then decrements the reference count of this object to0, which causes it to be deallocated How does that happen? When theautorelease

Ngày tải lên: 12/08/2014, 23:22

... Objective-C language abstract class A class defined to make creating subclasses easier Instances are created from the subclass, not of the abstract class See also concrete subclass accessor method ... Fraction to the... gain their etymology from the discipline of objectoriented programming In the latter case, I provide the meaning of the term as it specifically applies to the Objective-C ... re- cap, here’s the sequence we want to set up: 1. The user presses the button labeled 1. 2. This event causes the click1: method to be invoked. 3. The click1: method changes the text of the instance

Ngày tải lên: 12/08/2014, 23:22

... http://www.simpopdf.com 526 Appendix B Objective-C 2.0 Language Summary Because the modulus and multiplication operators appear in the same grouping in Table B.4, they have the same precedence.The associativity ... and restrict The keyword const can be placed before a type declaration to tell the compiler the value cannot be modified. So, the declaration const int x5 = 100; declares x5 to be a constant integer. ... 522 Appendix B Objective-C 2.0 Language Summary declares myFract to be an object of type Fraction—or more explicitly, myFract is used to hold a pointer to the object’s data structure after

Ngày tải lên: 12/08/2014, 23:22

... onreadystatechange  readyState – current status of request Trang 49header("Cache-Control: no-cache, must-revalidate"); // Date in the past header("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); ... 1WEB 2.0 Programming with AJAX E.Soundararajan SIRD, IGCAR Trang 4Web 2.0 is the network as platform, spanning all connected devices; Web 2.0 applications are those that make the most of the intrinsic ... XMLHTTP object, and tells the object to execute a function called stateChanged when a change is triggered  Opens the XMLHTTP object with the given url Trang 45Javascript- State Changed} }

Ngày tải lên: 24/10/2014, 14:55

... Therefore, the static method Int32.Parse is used to convert the string args[0] to its integer equivalent. 6.3.5 checked/unchecked Statements The checked and unchecked statements control the context ... 20 // Where an exception is thrown (by the runtime system). 21 public void Process() { 22 int num = 2; 23 int den = 0; 24 // 25 26 // The next statement will generate 27 // an arithmetic exception: ... Furthermore, only one catch block is executed for each exception that is raised. try { } catch (SpecificException e) { // From specific. // Handle a specific exception // } catch (GenericException e)

Ngày tải lên: 05/08/2014, 10:20

... 255, 255); Console.WriteLine("|{0:#.00}|{1:0.00}|{2,5:0.00}|{3,-5:0.00}|", .23, .23, .23, .23); } } Output: |$1.23|($1.23)| |123|-0123| |1.23|1.2300| |1.230000E+000|1.23| |123.00 %|1.23| ... Please pay $60.00 (no discount) Please pay $48.00 (20% discount) [...]... a constructor calls another constructor within the same class using the keyword this: public class Counter { public Counter() ... |FF|000FF| FF|FF | |.23|0.23| 0.23|0.23 | 3.1.4 Declaring Destructors The garbage collector in C# is an automatic memory management scheme that scans for objects that are no longer referenced

Ngày tải lên: 12/08/2014, 09:22

... constructor with initial capacity 10 Stack(ICollection) // Copy constructor from a specific collection Stack(int) // Constructor with a specific initial capacity Queue() // Default constructor ... initial capacity 32 Queue(ICollection) // Copy constructor from a specific collection Queue(int) // Constructor with a specific initial capacity Queue(int, float) // Constructor with a specific initial ... from the collection, and determine whether the collectioncontains a specific value The method IndexOf simply returns the index of a specific item in the collection whereas the method Insert places

Ngày tải lên: 12/08/2014, 09:22

... CONG cic ccccccescesssecssesssessssetsessesseretsvetsrssresirectiessissssetsretsissressretsetsissetetsesseseested 14 3.1.4 Thách thức - 22112 1211121121122 81212 110101212111 ng trau 14 400800/.000n ... nghiêm CứU: 2-51 21 9112222111211 112111211211211212021212222 rau 4 Phương pháp nghiễm CỨU c1 1121 11111111111 1111111111111 11H HH HH Hà H101 111 01t Hy 5 Cấu trúc tiểu luận: 1s cn n1 1111111111111 ... VIET NAM cccccccccsccessesessesssecsevessreseseseressisetisssressevetsretiusaretsrettiessisssessretsessresssetsstsssesreseeseed 14 3.1 Phan tich ma tran SWOT cccccccccccccesscesssesesesssecsseessesssietstetsisssressretissssessrectisetsstersieseeteed

Ngày tải lên: 04/02/2025, 20:26

... đốc phải chịutrách nhiệm hoàn toàn về phần việc của mình trước giám đốc  Các phòng ban chức năng: có nhiệm vụ tham mưu trợ giúp ban giám đốc điềuhành các công việc và tổ chức triển khai theo chức ... trị có trách nhiệm cung cấp, công bố toàn bộ nhữngthông tin kinh doanh, hoạt động tài chính,… của công ty cũng như phải trả lờicác câu hỏi chất vấn của ban kiểm soát, tổ chức công đoàn và các cơ ... toàn chặtchẽ,logic Khá chặtchẽ,logic; cònsai sótnhỏkhônggây ảnh Tươngđối chặtchẽ,logic; cóphầnchưa đảmbảo gây Khôngchặt chẽ,logic Trang 6Tiêu chí Điểm tối đa Tốt 100% Khá 75% Trung bình 50% Kém 0%

Ngày tải lên: 04/02/2025, 20:27

... create a new Console Application project just as we did in Chapter 2. To add a new class, use the Project→Add Class menu item (or right-click on the project in the Solution Explorer and select ... 64 | Chapter 3: Abstracting Ideas with Classes and Structs PascalCasing and camelCasing Most programming languages, including C#, use whitespace to separate elements of the code—it must be clear ... protection, the effective accessibility is the low- est specified. For example, although our property has public accessibility, the class of which it is a member has internal accessibility. The

Ngày tải lên: 06/08/2014, 09:20

... &c c2 2; / /need to allocate space for c2 Given this, the compiler knows the values of c c1 1 and c c2 2 so that they can be used in constant sions Because the values of c c3 3 and c c4 4 ... functions f f(c ch ha ar r), g g(c ch ha ar r&), and h h(c co on ns st t c ch ha ar r&) Call them with the arguments ´a a´, 4 49 9, 3 33 00 0, c c, u uc c, and s sc c, where c c is a c ch ... example: c ch ha ar r*c co on ns st t c cp p; / /const pointer to char c ch ha ar r c co on ns st t*p pc c; / /pointer to const char c co on ns st t c ch ha ar r*p pc 2; / /pointer to const char

Ngày tải lên: 12/08/2014, 19:21

... Part I, “C# 1.0,” includes Chapters 1–18 and describes the C# 1.0 language, as delivered in Visual Studio NET 2002 and 2003 Part II, “C# 2.0,” includes Chapters 19–23 and describes the four major ... Assuming that the “Hello, World” program is stored in the file hello.cs, the program can be compiled with the Microsoft C# compiler using the command line csc hello.cs which produces an executable assembly ... Anders Hejlsberg Scott Wiltamuth Peter Golde Seattle, August 2003 Trang 3Part IC# 1.0 Hejlsberg.book Page 1 Friday, October 10, 2003 7:35 PM Trang 4Hejlsberg.book Page 2 Friday, October 10, 2003

Ngày tải lên: 12/08/2014, 23:23

... http://www.simpopdf.com 24 Chapter 2 Programming in Objective- C The percent character inside the first argument is a special character recognized by the NSLog function.The character that immediately follows the ... initial characteristics acquired from the factory, but also its current characteristics.Those charac- teristics can change dynamically.As you drive your car, the gas tank becomes depleted, the car ... Encoding and Decoding Methods 447 Using NSData to Create Custom Archives 454 Using the Archiver to Copy Objects 457 Exercises 459 Part III: Cocoa and the iPhone SDK 4 60 Chapter 20 . Introduction...

Ngày tải lên: 12/08/2014, 23:22

... programming (Computer science) 3. Macintosh (Computer) Programming. 4. iPhone (Smartphone )Programming. I. Title. QA76.73.O11 5C5 8 20 11 00 5.1'17dc 22 201 001 93 60 Copyright â 20 11 Pearson Education, ... 171 10 Control Structures in Objective- C 191 11 Categories, Extensions, and Security 21 3 12 Properties 22 9 13 Protocols 24 9 III: Advanced Concepts 26 5 14 Reference Counting 26 7 15 Garbage Collection ... process on some computer. One of the characteristics that distinguishes Objective- C from other common languages, especially C+ +, is that Objective- C is a very dynamic language. “Dynamic” here...

Ngày tải lên: 16/02/2014, 00:20