design patterns in c ppt

... Context cA = new Context( new ConcreteStrategyA()); cA.ContextInterface(); Context cB = new Context( new ConcreteStrategyB()); cB.ContextInterface(); Context cC = new Context( ... processing requirements and mechanism for creating objects in C# instead of using pointers to normal C++ and use this technique class inheritance and interfaces instead of multiple inheritance in ... implementing class inherits from an interface in the same way as from a base class An instance of this class can then be casted into the interface and access its methods In this way interfaces can

Ngày tải lên: 11/02/2020, 11:49

... identified in the Computing Curricula 1991 report of the ACM/IEEE-CS Joint Curriculum Task Force[43] The book specifically ad-dresses the following knowledge units: AL1: Basic Data structures, AL2: ... algorithm design techniques Included are brute-force and greedy algorithms, backtracking algorithms (including branch-and-bound), divide-and-conquer algorithms, and dynamic programming An object-oriented ... Garbage Collection 408 13.4 Stop-and-Copy Garbage Collection 411 13.5 Mark-and-Compact Garbage Collection 412 Exercises 416 Programming Projects 416 14 Algorithmic Patterns

Ngày tải lên: 13/02/2015, 11:26

... other disciplines, including computer science An organized collection of design patterns that relate to a particular field is called a pattern language In the object oriented world, design patterns ... subjects in the field of security, code reviews and agile methodologies for testing magazines including TestingExperience and AgileRecord He has given lectures on Python Programming at Indian Institute ... programmer Design Pattern Classifications  Creational Patterns - They describe how best an object can be created A simple example of such design pattern is a singleton class where only a single instance

Ngày tải lên: 12/09/2017, 01:25

... willexecute properly without any issue but in Java instead of synchronizing whole method wecan synchronize only the block of code which is affected while creating instance to escapethe extra overhead as below. Trang 14‘instance’ (since it is at half initialized ... * The classes defining the object structure rarely change, but you often want to define newoperations over the structure Changing the object structure classes requires redefining theinterface to all visitors, which is potentially costly If the object structure classes changeoften, then it’s probably better to define the operations in those classes ... 7Structural Design Patterns: Structural patterns provide different ways to create a classstructure, for example using inheritance and composition to create a large object fromsmall objects Following design patterns come under this category

Ngày tải lên: 04/03/2019, 10:03

... 20of binding — all observables are also observers, and establishing abinding connection in one direction also establishes a connection inthe reverse direction None of the bindings provided by RxCocoa (used in the MVVM-C chapter) or CwlViews (used in the MAVB ... We hope these videos will give you an even better idea of the practicalimplications of each of the application design patterns covered inthis book Trang 14Application Architecture Application architecture is a branch of software design concernedwith the structure of an application ... As a viewbinder is a list of bindings, we can verify that the bindings containthe items we expect and that they are configured correctly We canuse the bindings to test both initial construction and changes Testing in MAVB is similar to testing in MVVM

Ngày tải lên: 17/05/2021, 13:20

... XÁC THỰC có thể chồng chéo các tính năng xác thực đã được cung cấp.Mục đích của hệ thống thông tin là cung cấp các tài nguyên đa dạng cho người dùng hoặc các quá trình Để xác định quyền truy cập, ... thường yêu cầu xác thực, nhưng có thể cần xác thực bổ sung khi truy cập vào các tài nguyên nhạy cảm Đặc biệt trong các hệ thống phân tán, việc xác minh quyền truy cập vào các đối tượng được phân ... Composite Tổ chức các đối tượng theo cấu trúc phân cấp dạng cây.Tất cả các đối tượng trong cấu trúc được thao tác theo một cách thuần nhất như nhau.Tạo ra mối quan hệ thứ bậc bao gộp giữa các

Ngày tải lên: 21/10/2021, 10:11

... <<endl; P3. Incorporate C++ comments and character strings into the bracket checkingprogram, so that any bracket within a comment or character string is ignored 2.5 ABSTRACT DATA TYPES AND ... user, checkingthat it is valid and converting it to lowercase by using the string function tolower( )that is declared in the standard header filecctype (The filecctype, or its older in-carnationctype.h, ... stack includes a construc-tor that initializes each newly created stack as empty: In our earlier program forreversing a line of input, such an initialization was crucial Naturally, we shall 37 create

Ngày tải lên: 12/08/2014, 16:21

... and PRESENCE INDICATOR patterns later in this chapter) Related design patterns To promote communication with friends, both the MESSAGING and PRESENCE INDICATOR patterns usually accompany FRIEND ... like interests can share and connect with each other Therefore, a community can be in the form of discussion groups around a topic (e.g., Usenet); groups created within a social networking application ... each users ’ privacy preferences and indicate their online status accordingly ALLOW USERS TO INDICATE THEIR ACTIVITY STATUS A recent trend is to allow users to indicate their activity status

Ngày tải lên: 26/01/2014, 20:20

... (a cross in a square box) means “ correct ” or “ okay ” in many coun-tries But in Japan and Korea, a circle is used instead of a check mark to mean “ yes ” ; in fact, the checkmark indicates “ ... the currency, in this case, to Euros ( €) (c) (a) (b) (c) Trang 15 Why Showing users price information in their local currencies and formats helps them because they know exactly how much ... native formats In addition, where users may encounter prices in a currency other than in which they wish to transact, allow them to change it by specifying either country or desired currency ( Figure

Ngày tải lên: 26/01/2014, 20:20

... which I think can be useful in explaining aesthetics in design and in guiding practice Certainly these propositions are incomplete and are yet to be validated em- pirically With this disclaimer, ... Creation of Artifacts in Society, Pontifica Press (www.pontifica.com), forthcoming 2007 To view a copy of this license, visit: http://creativecommons.org/licenses/by-nd/2.5/ Aesthetics in Design ... immediately find this car cute? How can a car be cute? Why do we like cute inanimate objects? We don’t need much imagination to create a theory of cuteness Babies exhibit certain physical features such

Ngày tải lên: 19/02/2014, 17:20

... 1Socket Programming in C/C++cSeptember 24, 2004 Trang 3Sockets are a protocol independent method of creating a connection between processes Sockets can be either I connection based or connectionless: ... connection is completed, thesocket is closed, and next connection can beaccepted Forking server: After an accept, a child process is forked off to handle the connection Variation: the child processesare ... build a concurrent server: I a fork is performed after the accept I The child process closes listenFd, and communicates usingconnectFd I The parent process closses connectFd, and then loops back tothe

Ngày tải lên: 15/03/2014, 17:20

... Metapatterns 139 Job Chaining 139 With the Driver 140 Job Chaining Examples 141 With Shell Scripting 150 Trang 9With JobControl 153Chain Folding 158 The ChainMapper and ChainReducer Approach ... setCombinerClass ( IntSumReducer class ); job setReducerClass ( IntSumReducer class ); job setOutputKeyClass ( Text class ); job setOutputValueClass ( IntWritable class ); FileInputFormat ... learning, and certification training zations, government agencies, and individuals Subscribers have access to thousands ofbooks, training videos, and prepublication manuscripts in one fully searchable

Ngày tải lên: 22/03/2014, 17:20

... activating the plasma membrane NADPH oxidase via a signaling pathway involving trimeric G-protein, phosphatidyl-inositol 3-kinase, Src family tyrosine kinases, and an increase in cytosolic Ca2+ ... intracellular activation events, including an increase in cytosolic Ca2+ concentration and phos-phorylation of cytosolic proteins, leading to the assem-bly of the superoxide-forming NADPH oxidase on the ... remains unexpected This heme-binding Dlp is reported to bind DNA [23], despite the absence of Lys or Arg residues in the long N-terminus and the C-terminal extension In addition, according to Ceci

Ngày tải lên: 30/03/2014, 04:20

... set-point (input) by calculating and then providing a corrective signal that can adjust the process accordingly as shown in Figure 12 Fig 12 Closed-loop feedback single-input single-output (SISO) control ... the economics performance index is another important objective for controller design for many practical control systems Typical performance indexes include, for instance, minimum time and minimum ... performance measures to be incorporated in the adaptive control design, deemed as a technical challenge for the conventional adaptive control schemes, that will be considered in this Chapter include:

Ngày tải lên: 19/06/2014, 08:20

... problems for which the objective function E Trang 3Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)has many local minima In practical cases, it is often ... significant uphill excursion In 1953, Metropolis and coworkers[5] first incorporated these kinds of prin-ciples into numerical calculations Offered a succession of options, a simulated thermodynamic ... de=revcst(x,y,iorder,ncity,n); Calculate cost. Trang 6Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)if (ans) { ++nsucc; path += de; reverse(iorder,ncity,n); Carry

Ngày tải lên: 01/07/2014, 09:20

... iz1, int iz2, int jz1, int jz2, int jm1, int jm2, int jmf, int ic1, int jc1, int jcf, int kc, float ***c, float **s); int ic1,ic2,ic3,ic4,it,j,j1,j2,j3,j4,j5,j6,j7,j8,j9; int jc1,jcf,jv,k,k1,k2,km,kp,nvars,*kmax; ... red(ic1,ic4,j1,j2,j3,j4,j9,ic3,jc1,jcf,kp,c,s); pinvs(ic1,ic4,j3,j9,jc1,k,c,s); } k=k2+1; Final boundary conditions. difeq(k,k1,k2,j9,ic1,ic2,indexv,ne,s,y); red(ic1,ic2,j5,j6,j7,j8,j9,ic3,jc1,jcf,k2,c,s); pinvs(ic1,ic2,j7,j9,jcf,k2+1,c,s); ... free_vector(pscl,ie1,ie2); free_ivector(indxr,ie1,ie2); } void red(int iz1, int iz2, int jz1, int jz2, int jm1, int jm2, int jmf, int ic1, int jc1, int jcf, int kc, float ***c, float **s) Reduce columns jz1-jz2

Ngày tải lên: 01/07/2014, 09:20

... solution, since any vector in in any linear combination Trang 4Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)If we want to single out one particular ... small: Their corresponding columns in V are linear combinations of x’s which are insensitive free parameters in the fit These matters are discussed more fully in Chapter 15 Constructing an Orthonormal ... vector b In such cases, the solution vector x obtained by zeroing the Trang 6Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521-43108-5)It may seem paradoxical that

Ngày tải lên: 01/07/2014, 09:20

... Writing Windows C# Programs 47 Objects in C# 47 Managed Languages and Garbage Collection 48 Classes and Namespaces in C# 48 Building a C# Application 49 The Simplest Window Program in C# ... system. Characters and strings in C# are always 16 bits wide: to allow for representation of characters in non-Latin languages. It uses a character coding system called Unicode, in which thousands ... classes. Thus, the second major precept suggested by Design Patterns is Favor object composition over inheritance. C# Design Patterns Each of the 23 patterns in Design Patterns is discussed, at least...

Ngày tải lên: 18/10/2013, 17:15

... s . c p p #include < QTextStream> #include < QCoreApplication> #include < QStringList> int main (int argc, char* argv[]) { QCoreApplication app(argc, argv); QTextStream cout(stdout); QStringList ... permitting direct access to memory through the use of pointers. is section explains the basic pointer operations and modiers and introduces dynamic memory usage. Pointers can seem complicated ... accesses its data directly , but the variable px accesses the same data indirectly. is is why the word indirection is often used to characterize the process of accessing data through a pointer....

Ngày tải lên: 24/03/2014, 01:21

... Interface Patterns 10 Chapter 2. Introducing Interfaces 11 Ordinary Interfaces 11 Interfaces and Obligations 12 Placing Constants in Interfaces 13 Summary 16 Beyond Ordinary Interfaces 16 Chapter ... calculate the lifting charge force, so you can model thrust as an initial spike that quickly drops to zero. Chapter 2. Introducing Interfaces 11 Chapter 2. Introducing Interfaces Speaking ... begins with a chapter on ordinary Java interfaces. That chapter will challenge your understanding of the Java interface construct, especially in comparison to abstract classes. The remaining chapters...

Ngày tải lên: 16/01/2014, 20:20