Objective-C classes define blueprints for objects. A class describes common properties and behaviors for any instance of that class. Classes provide an interface that lists messages an object can receive and a implementation that contains executable code for each message. When building apps, most work involves customizing and combining framework classes with your own classes to provide unique functionality.
The document discusses key concepts of object-oriented programming (OOP) including objects, classes, constructors, encapsulation, inheritance, and polymorphism. It provides examples to illustrate each concept. Objects contain data (states) and behaviors (methods). A class acts as a blueprint to create objects. Constructors initialize objects. Encapsulation hides implementation details and controls access via getters and setters. Inheritance allows classes to acquire properties and behaviors of other classes. Polymorphism allows the same method to process objects differently based on their data type.
The document provides an introduction to the Objective-C programming language. It discusses objects, classes, messaging between objects, and the Objective-C runtime system. It covers key concepts such as classes, inheritance, protocols, properties, categories and extensions, memory management, and threading. The document is intended for readers interested in programming with Objective-C or learning the basis of the Cocoa frameworks.
Class clusters group a number of private subclasses under a public abstract superclass. This simplifies the publicly visible architecture without reducing functionality. For example, instead of distinct classes for different number types, there could be a single Number superclass with private subclasses for specific types. This keeps the interface simple while allowing different internal representations.
Data abstraction and object orientationHoang Nguyen
This document discusses object-oriented programming concepts like abstraction, encapsulation, inheritance, and polymorphism. It provides historical context on the development of these concepts over time in languages like Simula67, Smalltalk, C++, Java, and others. Key aspects covered include data abstraction, abstract data types, classes, inheritance hierarchies, visibility rules, constructors and destructors, virtual functions, and multiple inheritance.
The document discusses access modifiers in Java. There are four access modifiers: public, private, protected, and default. Public members are accessible everywhere, private only within the class, protected within subclasses and the package, and default only within the package. The document demonstrates how to use access modifiers with attributes and methods, including using getter and setter methods to access private attributes from other classes.
This document provides an overview of ADO.NET Entity Framework (EF), which is an object-relational mapping (ORM) framework that allows .NET developers to work with relational data using domain-specific objects. It discusses key EF concepts like the entity data model, architecture, features, and lifecycle. The document explains that EF maps database tables and relationships to .NET classes and allows LINQ queries over object collections to retrieve and manipulate data, hiding SQL complexity. It also covers the ObjectContext class that manages database connections and entities.
The document provides an overview of lecture 03 on objects and classes in Java, including reviewing basic concepts, declaring and using classes, implementing inheritance, and discussing abstract classes and interfaces. It also includes examples of declaring classes, using constructors and methods, and implementing inheritance and polymorphism. The lecture aims to help students understand object-oriented concepts in Java like classes, objects, inheritance and polymorphism.
The document discusses key concepts of object-oriented programming (OOP) including objects, classes, constructors, encapsulation, inheritance, and polymorphism. It provides examples to illustrate each concept. Objects contain data (states) and behaviors (methods). A class acts as a blueprint to create objects. Constructors initialize objects. Encapsulation hides implementation details and controls access via getters and setters. Inheritance allows classes to acquire properties and behaviors of other classes. Polymorphism allows the same method to process objects differently based on their data type.
The document provides an introduction to the Objective-C programming language. It discusses objects, classes, messaging between objects, and the Objective-C runtime system. It covers key concepts such as classes, inheritance, protocols, properties, categories and extensions, memory management, and threading. The document is intended for readers interested in programming with Objective-C or learning the basis of the Cocoa frameworks.
Class clusters group a number of private subclasses under a public abstract superclass. This simplifies the publicly visible architecture without reducing functionality. For example, instead of distinct classes for different number types, there could be a single Number superclass with private subclasses for specific types. This keeps the interface simple while allowing different internal representations.
Data abstraction and object orientationHoang Nguyen
This document discusses object-oriented programming concepts like abstraction, encapsulation, inheritance, and polymorphism. It provides historical context on the development of these concepts over time in languages like Simula67, Smalltalk, C++, Java, and others. Key aspects covered include data abstraction, abstract data types, classes, inheritance hierarchies, visibility rules, constructors and destructors, virtual functions, and multiple inheritance.
The document discusses access modifiers in Java. There are four access modifiers: public, private, protected, and default. Public members are accessible everywhere, private only within the class, protected within subclasses and the package, and default only within the package. The document demonstrates how to use access modifiers with attributes and methods, including using getter and setter methods to access private attributes from other classes.
This document provides an overview of ADO.NET Entity Framework (EF), which is an object-relational mapping (ORM) framework that allows .NET developers to work with relational data using domain-specific objects. It discusses key EF concepts like the entity data model, architecture, features, and lifecycle. The document explains that EF maps database tables and relationships to .NET classes and allows LINQ queries over object collections to retrieve and manipulate data, hiding SQL complexity. It also covers the ObjectContext class that manages database connections and entities.
The document provides an overview of lecture 03 on objects and classes in Java, including reviewing basic concepts, declaring and using classes, implementing inheritance, and discussing abstract classes and interfaces. It also includes examples of declaring classes, using constructors and methods, and implementing inheritance and polymorphism. The lecture aims to help students understand object-oriented concepts in Java like classes, objects, inheritance and polymorphism.
Object Oriented Programming Concepts using JavaGlenn Guden
This document discusses object-oriented programming and compares old procedural programming techniques using structures to the newer object-oriented approach using classes. Specifically:
- Old programming used structures to define data types and separate functions to operate on those structures.
- The new object-oriented approach defines classes that encapsulate both the data structure and functions together as objects.
- Some key benefits of the object-oriented approach are that new types of objects can be added without changing existing code, and that new objects can inherit features from existing objects, making the code easier to modify.
This document discusses classes, objects, and methods in Java. It defines a class as a user-defined data type that contains fields and methods. Objects are instances of classes that allocate memory at runtime. Methods define behaviors for objects and are declared within classes. The document covers defining classes, creating objects, accessing members, constructors, method overloading and overriding, static members, passing objects as parameters, recursion, and visibility control.
The document discusses access modifiers in Java and their usage with variables, functions, and classes at different levels. It explains that access modifiers like private, protected, default, and public determine whether elements are visible from within the same class, package, subclass, or any class. Private is most restrictive while public is most accessible. It also covers other concepts like static methods, inheritance, polymorphism, abstract classes, interfaces and exception handling in Java.
Here is the Cuboid class with private instance variables, public volume() method, setter and getter methods as specified in the question:
public class Cuboid {
private double length;
private double breadth;
private double height;
public double volume() {
return length * breadth * height;
}
public boolean setLength(double len) {
if(len > 0) {
this.length = len;
return true;
}
return false;
}
public boolean setBreadth(double bre) {
if(bre > 0) {
this.breadth = bre;
return true;
}
return false;
}
public boolean setHeight(double hei
JDBC provides an API for accessing databases from Java that simplifies development, supports metadata access, and allows connection pooling. It includes interfaces for application writers and driver writers, with popular drivers available for databases like Oracle, MySQL, and SQL Server. JDBC drivers can be Type 1 (JDBC-ODBC bridge), Type 2 (partial JDBC), Type 3 (pure Java for middleware), or Type 4 (direct connection).
This document discusses classes and objects in Java, including:
- Classes should implement object models and reflect real-world objects.
- Constructors prepare objects for use and finalizers perform cleanup before objects are discarded.
- Reference objects and the garbage collector determine how reachable objects are.
- Cloning objects allows copying but a deep copy duplicates contained objects.
- The Reflection API supports introspection to access class information at runtime.
- Nested and inner classes can be defined inside other classes.
Object Oriented Solved Practice Programs C++ ExamsMuhammadTalha436
The question asks to create classes to represent publications, books, and tapes. The Publication class has title and price attributes. The Book class inherits from Publication and adds a noOfPages attribute. The Tape class inherits from Publication and adds a playingTime attribute.
The document provides an overview of key Java concepts including classes, objects, methods, constructors, inheritance, polymorphism, abstraction, and encapsulation. It defines classes like Circle and Shape that demonstrate these concepts. Circles have fields like radius and methods like area() and circumference(). The Shape class is abstract with abstract area() and circumference() methods that concrete subclasses like Circle must implement. Access modifiers like public, private, and protected are used to control access to class members.
1. The document discusses separating a class interface from its implementation by defining the class in a header file and defining member functions in a source code file.
2. It shows a Time class defined in the time1.h header file and member functions defined in the time1.cpp source file.
3. A driver program includes the header file, creates a Time object, and calls member functions to demonstrate the separation of interface and implementation.
Data access patterns and technologies are discussed. The Data Access Object (DAO) pattern separates data access from business logic. Spring JDBC and myBatis provide APIs for SQL queries and object mapping. Object-relational mapping (ORM) tools like Hibernate reduce code by mapping objects to relational databases but can reduce performance. JDBC template provides basic data access while frameworks offer additional features.
The document provides an agenda and overview of key concepts in object-oriented programming with Java including:
1. Class syntax such as access modifiers, static members, constructors, initializers, and the 'this' keyword.
2. Inheritance concepts like subclasses, superclasses, overriding methods, and the 'super' keyword.
3. Interfaces as contracts that can be implemented by classes to define common behaviors without implementation.
4. Nested classes including static nested classes and inner classes, as well as anonymous classes defined without a class name.
5. Enums, constructors, and initializers are also covered but examples are not shown.
The Ring programming language version 1.5.2 book - Part 70 of 181Mahmoud Samir Fayed
This document provides documentation on resolving various conflicts that can occur when working with classes in Ring. It discusses conflicts that can arise between class attributes and local variables, and provides solutions like using self before the attribute name. It also covers conflicts that can occur when accessing objects using braces inside class methods, and solutions like copying self to a local variable first. The document explains best practices for creating classes to represent windows in GUI applications and discusses potential conflicts between self inside braces and self in the class region.
This document provides an overview of several built-in classes in Java, including Arrays, Math, wrapper classes, and BigInteger. It discusses the key methods and functionality of each class. The Arrays class contains static methods for common array operations like sorting and searching. The Math class contains commonly used mathematical functions that operate on primitive types. Wrapper classes "wrap" the primitive types in object classes. BigInteger provides operations for very large integers.
This document provides an overview of object-oriented programming concepts in Visual Basic, including classes, objects, fields, properties, methods, constructors, destructors, inheritance, polymorphism, and interfaces. It discusses key Visual Basic concepts like classes, objects, access specifiers, and shows examples of creating a class with fields and properties. It also covers more advanced topics such as inheritance, polymorphism, abstract classes, interfaces, and collections.
The document provides an introduction to object-oriented programming concepts in Java, including objects, classes, encapsulation, inheritance, polymorphism, and constructors. It defines key OOPs concepts such as a class acting as a blueprint for an object. Features like data hiding, abstraction, encapsulation, and different types of inheritance relationships are explained. The differences between method overloading and overriding are highlighted. Default and parameterized constructors are demonstrated with examples.
This document provides an agenda for a presentation on esoteric LINQ and structural madness. The agenda includes background information on data structures like graphs, trees, and lists. It also covers design patterns like iterator, observer, visitor, and specification. The document then provides primers on LINQ and how it can be applied to functions, graphs, and specifications. The presentation aims to explore advanced and unconventional applications of LINQ through functional combinators and predicate logic.
This document provides an overview of object-oriented programming (OOP) concepts like classes, objects, inheritance, encapsulation, and polymorphism. It compares procedural programming to OOP and contrasts the languages C and Java. Key differences between C and Java include Java's use of classes, objects, garbage collection, and platform independence. The document also demonstrates how to define classes and create objects in Java, including using constructors, getters, setters, inheritance, and polymorphism.
This document discusses methods in object-oriented programming. It explains two types of methods: instance methods and class methods. Instance methods require an object to invoke, while class methods do not. The document also covers constructors, which are special methods used to initialize objects. Constructors have the same name as the class and do not specify a return type. Default constructors are automatically generated if no other constructors are defined. Multiple constructors can be defined using constructor overloading.
Patterns (contd)Software Development ProcessDesign patte.docxdanhaley45372
Patterns (contd)
Software Development Process
Design patterns used to handle change
More time extending and changing code than developing it.
The Strategy design pattern handle change by selecting from a family of external algorithms rather than rewrite.
Design point: Make code closed for modification of code, but open for extension
Problem
Computer object created
Description Method returns
Getting a Computer
Problem
Program has to change every time
Customer changes options
Decorator Pattern
Wrapper code used to extend your core code
Extend a class dynamically at runtime
Decorator uses wrapper code to extend core functionality - decorating the code
Decorator Pattern
description() returns “You are getting a computer”
Wrapper description() returns
“You are getting a computer and a disk”
Wrapper description() returns
“You are getting a computer and a disk and a monitor”
Decorator Pattern
Core component: Computer
Variables holding computer objects should also be able to hold objects that wrap computer objects.
Extend the wrapper classes from the Computer class.
Abstract class cannot be instantiated
Ensures all wrappers are consistent
Developers have to provide their own description
Decorator Pattern
Method calls the core computer object’s
description method and adds “and a disk”
Decorator Pattern
Method calls the core computer object’s
description method and adds “and a disk”
Extend the core object by wrapping it in decorator wrappers. Avoids modification of the core code.
Each successive wrapper called the description method of the object it wrapped and added something to it.
Factory Pattern
Based on type, call the
Connection method
Factory Pattern
Create a method that returns the
correct connection type
Factory Pattern
New operator used to create OracleConnection objects.
New operator used to create SqlServerConnection objects, and MySqlConnection objects.
New operator to instantiate many different concrete classes
Code becomes larger and needs to be replicated in many places
Factor that code out into a method.
Code keeps changing
Encapsulate code into a factory object
Goal: Separate out the changeable code and leave the core code closed for modification
Building the Factory
Creating the Factory
FirstFactory class encapsulates the connection object creation
Pass to it the type of connection (“Oracle”, “SQL Server”,)
Use the factory object to create connection objects with a factory method named createConnection
Building the Factory
Create the FirstFactory class.
Save the type of the database, passed to the FirstFactory class’s constructor.
Object-creation code changes
Check which type of object to be created
(OracleConnection, SqlServerConnection,
and then create it.
Factory Class
Create the Abstract Connection Class
Core code should not be modified or has to be modified
as little as possible.
Using the connection object returned by the
new factory object
Use t.
Web Services: Encapsulation, Reusability, and Simplicityhannonhill
The document discusses web services and their encapsulation, reusability, and simplicity. It covers topics like hiding usernames/passwords, using fully qualified identifiers to locate nodes, and creating reusable classes like Asset and Property. Code examples show how to retrieve assets, work with data definition blocks, and traverse an asset tree to publish pages simply using global functions. The presentation aims to highlight best practices for web services development.
Object Oriented Programming Concepts using JavaGlenn Guden
This document discusses object-oriented programming and compares old procedural programming techniques using structures to the newer object-oriented approach using classes. Specifically:
- Old programming used structures to define data types and separate functions to operate on those structures.
- The new object-oriented approach defines classes that encapsulate both the data structure and functions together as objects.
- Some key benefits of the object-oriented approach are that new types of objects can be added without changing existing code, and that new objects can inherit features from existing objects, making the code easier to modify.
This document discusses classes, objects, and methods in Java. It defines a class as a user-defined data type that contains fields and methods. Objects are instances of classes that allocate memory at runtime. Methods define behaviors for objects and are declared within classes. The document covers defining classes, creating objects, accessing members, constructors, method overloading and overriding, static members, passing objects as parameters, recursion, and visibility control.
The document discusses access modifiers in Java and their usage with variables, functions, and classes at different levels. It explains that access modifiers like private, protected, default, and public determine whether elements are visible from within the same class, package, subclass, or any class. Private is most restrictive while public is most accessible. It also covers other concepts like static methods, inheritance, polymorphism, abstract classes, interfaces and exception handling in Java.
Here is the Cuboid class with private instance variables, public volume() method, setter and getter methods as specified in the question:
public class Cuboid {
private double length;
private double breadth;
private double height;
public double volume() {
return length * breadth * height;
}
public boolean setLength(double len) {
if(len > 0) {
this.length = len;
return true;
}
return false;
}
public boolean setBreadth(double bre) {
if(bre > 0) {
this.breadth = bre;
return true;
}
return false;
}
public boolean setHeight(double hei
JDBC provides an API for accessing databases from Java that simplifies development, supports metadata access, and allows connection pooling. It includes interfaces for application writers and driver writers, with popular drivers available for databases like Oracle, MySQL, and SQL Server. JDBC drivers can be Type 1 (JDBC-ODBC bridge), Type 2 (partial JDBC), Type 3 (pure Java for middleware), or Type 4 (direct connection).
This document discusses classes and objects in Java, including:
- Classes should implement object models and reflect real-world objects.
- Constructors prepare objects for use and finalizers perform cleanup before objects are discarded.
- Reference objects and the garbage collector determine how reachable objects are.
- Cloning objects allows copying but a deep copy duplicates contained objects.
- The Reflection API supports introspection to access class information at runtime.
- Nested and inner classes can be defined inside other classes.
Object Oriented Solved Practice Programs C++ ExamsMuhammadTalha436
The question asks to create classes to represent publications, books, and tapes. The Publication class has title and price attributes. The Book class inherits from Publication and adds a noOfPages attribute. The Tape class inherits from Publication and adds a playingTime attribute.
The document provides an overview of key Java concepts including classes, objects, methods, constructors, inheritance, polymorphism, abstraction, and encapsulation. It defines classes like Circle and Shape that demonstrate these concepts. Circles have fields like radius and methods like area() and circumference(). The Shape class is abstract with abstract area() and circumference() methods that concrete subclasses like Circle must implement. Access modifiers like public, private, and protected are used to control access to class members.
1. The document discusses separating a class interface from its implementation by defining the class in a header file and defining member functions in a source code file.
2. It shows a Time class defined in the time1.h header file and member functions defined in the time1.cpp source file.
3. A driver program includes the header file, creates a Time object, and calls member functions to demonstrate the separation of interface and implementation.
Data access patterns and technologies are discussed. The Data Access Object (DAO) pattern separates data access from business logic. Spring JDBC and myBatis provide APIs for SQL queries and object mapping. Object-relational mapping (ORM) tools like Hibernate reduce code by mapping objects to relational databases but can reduce performance. JDBC template provides basic data access while frameworks offer additional features.
The document provides an agenda and overview of key concepts in object-oriented programming with Java including:
1. Class syntax such as access modifiers, static members, constructors, initializers, and the 'this' keyword.
2. Inheritance concepts like subclasses, superclasses, overriding methods, and the 'super' keyword.
3. Interfaces as contracts that can be implemented by classes to define common behaviors without implementation.
4. Nested classes including static nested classes and inner classes, as well as anonymous classes defined without a class name.
5. Enums, constructors, and initializers are also covered but examples are not shown.
The Ring programming language version 1.5.2 book - Part 70 of 181Mahmoud Samir Fayed
This document provides documentation on resolving various conflicts that can occur when working with classes in Ring. It discusses conflicts that can arise between class attributes and local variables, and provides solutions like using self before the attribute name. It also covers conflicts that can occur when accessing objects using braces inside class methods, and solutions like copying self to a local variable first. The document explains best practices for creating classes to represent windows in GUI applications and discusses potential conflicts between self inside braces and self in the class region.
This document provides an overview of several built-in classes in Java, including Arrays, Math, wrapper classes, and BigInteger. It discusses the key methods and functionality of each class. The Arrays class contains static methods for common array operations like sorting and searching. The Math class contains commonly used mathematical functions that operate on primitive types. Wrapper classes "wrap" the primitive types in object classes. BigInteger provides operations for very large integers.
This document provides an overview of object-oriented programming concepts in Visual Basic, including classes, objects, fields, properties, methods, constructors, destructors, inheritance, polymorphism, and interfaces. It discusses key Visual Basic concepts like classes, objects, access specifiers, and shows examples of creating a class with fields and properties. It also covers more advanced topics such as inheritance, polymorphism, abstract classes, interfaces, and collections.
The document provides an introduction to object-oriented programming concepts in Java, including objects, classes, encapsulation, inheritance, polymorphism, and constructors. It defines key OOPs concepts such as a class acting as a blueprint for an object. Features like data hiding, abstraction, encapsulation, and different types of inheritance relationships are explained. The differences between method overloading and overriding are highlighted. Default and parameterized constructors are demonstrated with examples.
This document provides an agenda for a presentation on esoteric LINQ and structural madness. The agenda includes background information on data structures like graphs, trees, and lists. It also covers design patterns like iterator, observer, visitor, and specification. The document then provides primers on LINQ and how it can be applied to functions, graphs, and specifications. The presentation aims to explore advanced and unconventional applications of LINQ through functional combinators and predicate logic.
This document provides an overview of object-oriented programming (OOP) concepts like classes, objects, inheritance, encapsulation, and polymorphism. It compares procedural programming to OOP and contrasts the languages C and Java. Key differences between C and Java include Java's use of classes, objects, garbage collection, and platform independence. The document also demonstrates how to define classes and create objects in Java, including using constructors, getters, setters, inheritance, and polymorphism.
This document discusses methods in object-oriented programming. It explains two types of methods: instance methods and class methods. Instance methods require an object to invoke, while class methods do not. The document also covers constructors, which are special methods used to initialize objects. Constructors have the same name as the class and do not specify a return type. Default constructors are automatically generated if no other constructors are defined. Multiple constructors can be defined using constructor overloading.
Patterns (contd)Software Development ProcessDesign patte.docxdanhaley45372
Patterns (contd)
Software Development Process
Design patterns used to handle change
More time extending and changing code than developing it.
The Strategy design pattern handle change by selecting from a family of external algorithms rather than rewrite.
Design point: Make code closed for modification of code, but open for extension
Problem
Computer object created
Description Method returns
Getting a Computer
Problem
Program has to change every time
Customer changes options
Decorator Pattern
Wrapper code used to extend your core code
Extend a class dynamically at runtime
Decorator uses wrapper code to extend core functionality - decorating the code
Decorator Pattern
description() returns “You are getting a computer”
Wrapper description() returns
“You are getting a computer and a disk”
Wrapper description() returns
“You are getting a computer and a disk and a monitor”
Decorator Pattern
Core component: Computer
Variables holding computer objects should also be able to hold objects that wrap computer objects.
Extend the wrapper classes from the Computer class.
Abstract class cannot be instantiated
Ensures all wrappers are consistent
Developers have to provide their own description
Decorator Pattern
Method calls the core computer object’s
description method and adds “and a disk”
Decorator Pattern
Method calls the core computer object’s
description method and adds “and a disk”
Extend the core object by wrapping it in decorator wrappers. Avoids modification of the core code.
Each successive wrapper called the description method of the object it wrapped and added something to it.
Factory Pattern
Based on type, call the
Connection method
Factory Pattern
Create a method that returns the
correct connection type
Factory Pattern
New operator used to create OracleConnection objects.
New operator used to create SqlServerConnection objects, and MySqlConnection objects.
New operator to instantiate many different concrete classes
Code becomes larger and needs to be replicated in many places
Factor that code out into a method.
Code keeps changing
Encapsulate code into a factory object
Goal: Separate out the changeable code and leave the core code closed for modification
Building the Factory
Creating the Factory
FirstFactory class encapsulates the connection object creation
Pass to it the type of connection (“Oracle”, “SQL Server”,)
Use the factory object to create connection objects with a factory method named createConnection
Building the Factory
Create the FirstFactory class.
Save the type of the database, passed to the FirstFactory class’s constructor.
Object-creation code changes
Check which type of object to be created
(OracleConnection, SqlServerConnection,
and then create it.
Factory Class
Create the Abstract Connection Class
Core code should not be modified or has to be modified
as little as possible.
Using the connection object returned by the
new factory object
Use t.
Web Services: Encapsulation, Reusability, and Simplicityhannonhill
The document discusses web services and their encapsulation, reusability, and simplicity. It covers topics like hiding usernames/passwords, using fully qualified identifiers to locate nodes, and creating reusable classes like Asset and Property. Code examples show how to retrieve assets, work with data definition blocks, and traverse an asset tree to publish pages simply using global functions. The presentation aims to highlight best practices for web services development.
This document provides an overview of objects, classes, messaging, and the Objective-C runtime system. It discusses key concepts including:
- Objects associate instance variables (data) with methods (operations). Objects encapsulate their data and methods.
- The id type can hold any object regardless of class. Objects are dynamically typed at runtime based on their class.
- Messages in the form [receiver message] are used to send objects messages to invoke their methods. Method names in messages are called selectors.
- Polymorphism and dynamic binding allow objects to respond differently to the same message depending on their class. The runtime looks up the appropriate method implementation at runtime based on the object's class.
This document discusses key concepts of object-oriented design and programming. It defines object-oriented design as planning a system of interacting objects to solve software problems. It describes object-oriented programming as representing concepts as objects that have data fields and methods. The document outlines some key pillars of object-oriented programming including inheritance, which allows code reuse; encapsulation, which protects data; and access modifiers like public, private, and protected, which control object accessibility.
This is a presentation I did for the Cedar Rapids .NET User Group (CRineta.org). It was intended to present object oriented concepts and their application in .NET and C#.
Microsoft Entity Framework is an object-relational mapper that allows developers to work with relational data as domain-specific objects, and provides automated CRUD operations. It supports various databases and provides a rich query capability through LINQ. Compared to LINQ to SQL, Entity Framework has a full provider model, supports multiple modeling techniques, and continuous support. The Entity Framework architecture includes components like the entity data model, LINQ to Entities, Entity SQL, and ADO.NET data providers. Code First allows defining models and mapping directly through code.
This document discusses object-oriented programming concepts like classes, objects, encapsulation, inheritance, polymorphism, and more. It provides examples of defining classes with data members and member functions, creating objects, passing objects as arguments, and using constructors and destructors. Key points include how memory is allocated for classes and objects, characteristics of constructors, constructor overloading, and examples of programs using constructors and destructors to print student details.
C#.net, C Sharp.Net Online Training Course ContentSVRTechnologies
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This document provides an introduction to design patterns, including their motivation, history, definition, categories, and examples. Some key points:
- Design patterns solve common programming problems by describing reusable solutions that can be adapted for different situations.
- Common categories include creational, structural, and behavioral patterns. Example patterns discussed are Singleton, Decorator, Abstract Factory.
- Design patterns speed up development, promote code reuse, and make software more robust, maintainable and extensible. Resources for further information on design patterns are provided.
The document discusses how to code for accelerometer and Core Location in Objective-C. It provides code snippets for reading accelerometer data using UIAccelerometer and handling orientation changes. It also explains how to get the user's current location using the Core Location framework by initializing a CLLocationManager instance and setting a delegate to receive location updates.
This document provides an overview of querying and manipulating data using Entity Framework in .NET. It discusses Entity Framework concepts like Entity Data Models, Code First development, inheritance hierarchies, and querying. The document also covers ADO.NET connections, Entity Framework performance, and transactions. Key topics include creating EF data models, implementing POCO objects, querying with DbContext, and loading related data using lazy and eager loading.
Procedural Vs Object Oriented Programming
Procedural Programming
Can be defined as a programming model which is derived from structured programming,
based upon the concept of calling procedure. In these models, a programmer uses procedures
or functions to perform a task.
Languages used in Procedural Programming: C , Pascal , Fortan etc.
Object Oriented Programming can be defined as a programming model which is based
upon the concept of objects. Objects contain data in the form of attributes and code in the
form of methods. OOP concept uses variables and methods as procedural programs do, but it
focuses on the objects that contain variables and methods
Languages used in Object Oriented Programming:
Java, C++, C#, Python , Ruby
09/08/2022 3
Object-Oriented Programming (OOP)
Object Oriented programming (OOP) is a programming paradigm that relies on the
concept of classes and objects. It is used to structure a software program into simple,
reusable pieces of code blueprints (usually called classes), which are used to create individual
instances of objects.
It is a programming paradigm that structures a software program according to objects.
Simply put, it creates objects that contain functions and data. This paradigm relies
greatly on the concept of classes and objects.
The main aim of OOP is to bind together the data and the functions that operate on them so
that no other part of the code can access this data except that function.
09/08/2022 4
Object And Class
Class:A class is basically user-defined data types that act as a
template for creating objects of the identical type. It represents
the common properties and actions (functions) of an object.
Object: A real-world entity that has state and behavior. Here,
state represents properties and behavior represents actions and
functionality. For example, a person, chair, pen, table, etc
Object takes space in the memory but
class does not take any space in the
memory. Class does not exist physically
but an object exists physically.
09/08/2022 5
OOP Principles
Encapsulation: the attributes of an entity are enclosed in itself. In other words, encapsulation
is when an object (inside a class) keeps its state private and only exposes the selected
information.This principle requires the ability to define some fields as either private or public.
Abstraction: hide important information in order to reduce complexity. It is when the user
only interacts with specific object’s methods and/or attributes. By hiding complex details from
the user, abstraction consequently reduces complexity.
09/08/2022 6
OOP Principles
Inheritance: as the name indicates, an entity can inherit attributes from other entities. More
precisely, parent classes can extend their attributes and behaviors to child classes, which also
means that this principle supports reusability.
Polymorphism: entities can have more than one form. Hence the ‘poly’. In sum,
polymorphism is when objects are designed to share behaviors. By overriding
MCS,BCS-7(A,B) Visual programming Syllabus for Final exams @ ISPAli Shah
Exception handling in C# uses four keywords: try, catch, finally, and throw. The try block identifies code that might cause exceptions. The catch block handles exceptions, while finally ensures code is always executed. Exceptions are represented by classes derived from System.Exception, and common exceptions include NullReferenceException and DivideByZeroException. ADO.NET provides objects like SqlConnection and SqlCommand to connect C# applications to SQL Server databases using connection strings. Data can be queried, inserted, and read from databases through these objects.
The document provides an overview of enterprise computing and its key components from an object-oriented perspective. It discusses enterprise architectural concepts like the enterprise, enterprise components, and the role of information technology. It then covers various enterprise-enabling technologies like enterprise user interfacing, data enabling, distributed communications, common services, systems assurance, and web enabling. Finally, it discusses object-oriented software development for the enterprise using concepts like enterprise objects, the development process, the unified modeling language, and component-based development standards.
Building nTier Applications with Entity Framework Services (Part 1)David McCarter
Learn how to build real world nTier applications with the new Entity Framework and related services. With this new technology built into .NET, you can easily wrap an object model around your database and have all the data access automatically generated or use your own stored procedures and views. The session will demonstrate how to create and consume these new technologies from the ground up and focus on database modeling including views and stored procedures along with coding against the model via LINQ. Dynamic data website will also be demonstrated. Lots of code! Make sure to attend Part 2.
This document provides summaries of key .NET concepts and technologies:
1. StringBuilder is more efficient than String for text manipulation as Strings are immutable and new instances are created with each operation, while StringBuilder allows in-place editing.
2. The main .NET types for data storage are arrays, which can only hold one data type, and hash tables like HashTable and SortedList which allow retrieval by key.
3. Exception handling in C# uses try-catch blocks, with catch optionally specifying the exception type. Finally blocks are always executed whether an exception occurs or not.
4. Namespaces and assemblies allow .NET applications to be modular and reference external libraries. Key namespaces include System and
This document provides an overview of programming with C# and .NET. It discusses key concepts like the .NET Framework, Common Language Runtime (CLR), C# language features, assemblies, namespaces, properties, delegates and events, inheritance, interfaces, structures, pointers, boxing and unboxing, ref and out parameters, and .NET Remoting. It includes examples to demonstrate many of these programming concepts.
The document discusses design patterns, which are reusable solutions to common software design problems. It provides examples of different types of patterns, including creational (Factory Method, Abstract Factory, Builder, Prototype, Singleton), structural (Adapter, Bridge, Composite, Decorator, Facade, Flyweight, Proxy), and behavioral (Chain of Responsibility, Command, Interpreter, Iterator, Mediator, Memento, Observer, State, Strategy, Template Method, Visitor) patterns. Each pattern is defined and an example problem and solution using the pattern is described.
This document provides an introduction to object-oriented concepts, modeling, and system development. It discusses key topics such as:
- The benefits of object-oriented programming like modularity, information hiding, and code reuse.
- Basic concepts in OOP like objects, classes, encapsulation, inheritance, and polymorphism.
- The role of modeling in engineering by providing information about systems before they are built through mapping, reducing complexity, and being pragmatic.
- Object-oriented analysis focuses on understanding a system's functional requirements, unlike traditional function/data analysis which considers behavior and data separately.
The document discusses object-oriented programming concepts in C++ including classes, objects, encapsulation, inheritance, polymorphism, and more. It provides examples of class definitions and accessing class members. Key points covered include:
- Classes are templates that define objects, while objects are instances of classes.
- Encapsulation involves wrapping data and functions together in a class. Inheritance allows classes to acquire properties from other classes.
- Polymorphism allows a method to perform different actions based on parameters. Message passing involves communication between objects.
- Structured programming divides a program into functions and data, while object-oriented programming divides it into objects that contain data and functions.
Microservice Teams - How the cloud changes the way we workSven Peters
A lot of technical challenges and complexity come with building a cloud-native and distributed architecture. The way we develop backend software has fundamentally changed in the last ten years. Managing a microservices architecture demands a lot of us to ensure observability and operational resiliency. But did you also change the way you run your development teams?
Sven will talk about Atlassian’s journey from a monolith to a multi-tenanted architecture and how it affected the way the engineering teams work. You will learn how we shifted to service ownership, moved to more autonomous teams (and its challenges), and established platform and enablement teams.
Flutter is a popular open source, cross-platform framework developed by Google. In this webinar we'll explore Flutter and its architecture, delve into the Flutter Embedder and Flutter’s Dart language, discover how to leverage Flutter for embedded device development, learn about Automotive Grade Linux (AGL) and its consortium and understand the rationale behind AGL's choice of Flutter for next-gen IVI systems. Don’t miss this opportunity to discover whether Flutter is right for your project.
SMS API Integration in Saudi Arabia| Best SMS API ServiceYara Milbes
Discover the benefits and implementation of SMS API integration in the UAE and Middle East. This comprehensive guide covers the importance of SMS messaging APIs, the advantages of bulk SMS APIs, and real-world case studies. Learn how CEQUENS, a leader in communication solutions, can help your business enhance customer engagement and streamline operations with innovative CPaaS, reliable SMS APIs, and omnichannel solutions, including WhatsApp Business. Perfect for businesses seeking to optimize their communication strategies in the digital age.
What is Master Data Management by PiLog Groupaymanquadri279
PiLog Group's Master Data Record Manager (MDRM) is a sophisticated enterprise solution designed to ensure data accuracy, consistency, and governance across various business functions. MDRM integrates advanced data management technologies to cleanse, classify, and standardize master data, thereby enhancing data quality and operational efficiency.
Atelier - Innover avec l’IA Générative et les graphes de connaissancesNeo4j
Atelier - Innover avec l’IA Générative et les graphes de connaissances
Allez au-delà du battage médiatique autour de l’IA et découvrez des techniques pratiques pour utiliser l’IA de manière responsable à travers les données de votre organisation. Explorez comment utiliser les graphes de connaissances pour augmenter la précision, la transparence et la capacité d’explication dans les systèmes d’IA générative. Vous partirez avec une expérience pratique combinant les relations entre les données et les LLM pour apporter du contexte spécifique à votre domaine et améliorer votre raisonnement.
Amenez votre ordinateur portable et nous vous guiderons sur la mise en place de votre propre pile d’IA générative, en vous fournissant des exemples pratiques et codés pour démarrer en quelques minutes.
Transform Your Communication with Cloud-Based IVR SolutionsTheSMSPoint
Discover the power of Cloud-Based IVR Solutions to streamline communication processes. Embrace scalability and cost-efficiency while enhancing customer experiences with features like automated call routing and voice recognition. Accessible from anywhere, these solutions integrate seamlessly with existing systems, providing real-time analytics for continuous improvement. Revolutionize your communication strategy today with Cloud-Based IVR Solutions. Learn more at: https://thesmspoint.com/channel/cloud-telephony
WhatsApp offers simple, reliable, and private messaging and calling services for free worldwide. With end-to-end encryption, your personal messages and calls are secure, ensuring only you and the recipient can access them. Enjoy voice and video calls to stay connected with loved ones or colleagues. Express yourself using stickers, GIFs, or by sharing moments on Status. WhatsApp Business enables global customer outreach, facilitating sales growth and relationship building through showcasing products and services. Stay connected effortlessly with group chats for planning outings with friends or staying updated on family conversations.
Odoo ERP software
Odoo ERP software, a leading open-source software for Enterprise Resource Planning (ERP) and business management, has recently launched its latest version, Odoo 17 Community Edition. This update introduces a range of new features and enhancements designed to streamline business operations and support growth.
The Odoo Community serves as a cost-free edition within the Odoo suite of ERP systems. Tailored to accommodate the standard needs of business operations, it provides a robust platform suitable for organisations of different sizes and business sectors. Within the Odoo Community Edition, users can access a variety of essential features and services essential for managing day-to-day tasks efficiently.
This blog presents a detailed overview of the features available within the Odoo 17 Community edition, and the differences between Odoo 17 community and enterprise editions, aiming to equip you with the necessary information to make an informed decision about its suitability for your business.
Introducing Crescat - Event Management Software for Venues, Festivals and Eve...Crescat
Crescat is industry-trusted event management software, built by event professionals for event professionals. Founded in 2017, we have three key products tailored for the live event industry.
Crescat Event for concert promoters and event agencies. Crescat Venue for music venues, conference centers, wedding venues, concert halls and more. And Crescat Festival for festivals, conferences and complex events.
With a wide range of popular features such as event scheduling, shift management, volunteer and crew coordination, artist booking and much more, Crescat is designed for customisation and ease-of-use.
Over 125,000 events have been planned in Crescat and with hundreds of customers of all shapes and sizes, from boutique event agencies through to international concert promoters, Crescat is rigged for success. What's more, we highly value feedback from our users and we are constantly improving our software with updates, new features and improvements.
If you plan events, run a venue or produce festivals and you're looking for ways to make your life easier, then we have a solution for you. Try our software for free or schedule a no-obligation demo with one of our product specialists today at crescat.io
A Study of Variable-Role-based Feature Enrichment in Neural Models of CodeAftab Hussain
Understanding variable roles in code has been found to be helpful by students
in learning programming -- could variable roles help deep neural models in
performing coding tasks? We do an exploratory study.
- These are slides of the talk given at InteNSE'23: The 1st International Workshop on Interpretability and Robustness in Neural Software Engineering, co-located with the 45th International Conference on Software Engineering, ICSE 2023, Melbourne Australia
Neo4j - Product Vision and Knowledge Graphs - GraphSummit ParisNeo4j
Dr. Jesús Barrasa, Head of Solutions Architecture for EMEA, Neo4j
Découvrez les dernières innovations de Neo4j, et notamment les dernières intégrations cloud et les améliorations produits qui font de Neo4j un choix essentiel pour les développeurs qui créent des applications avec des données interconnectées et de l’IA générative.
Takashi Kobayashi and Hironori Washizaki, "SWEBOK Guide and Future of SE Education," First International Symposium on the Future of Software Engineering (FUSE), June 3-6, 2024, Okinawa, Japan
E-commerce Development Services- Hornet DynamicsHornet Dynamics
For any business hoping to succeed in the digital age, having a strong online presence is crucial. We offer Ecommerce Development Services that are customized according to your business requirements and client preferences, enabling you to create a dynamic, safe, and user-friendly online store.
Need for Speed: Removing speed bumps from your Symfony projects ⚡️Łukasz Chruściel
No one wants their application to drag like a car stuck in the slow lane! Yet it’s all too common to encounter bumpy, pothole-filled solutions that slow the speed of any application. Symfony apps are not an exception.
In this talk, I will take you for a spin around the performance racetrack. We’ll explore common pitfalls - those hidden potholes on your application that can cause unexpected slowdowns. Learn how to spot these performance bumps early, and more importantly, how to navigate around them to keep your application running at top speed.
We will focus in particular on tuning your engine at the application level, making the right adjustments to ensure that your system responds like a well-oiled, high-performance race car.
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI AppGoogle
AI Fusion Buddy Review: Brand New, Groundbreaking Gemini-Powered AI App
👉👉 Click Here To Get More Info 👇👇
https://sumonreview.com/ai-fusion-buddy-review
AI Fusion Buddy Review: Key Features
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✅Use Gemini to Build high-converting Converting Sales Video Scripts, ad copies, Trending Articles, blogs, etc.100% unique!
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See My Other Reviews Article:
(1) AI Genie Review: https://sumonreview.com/ai-genie-review
(2) SocioWave Review: https://sumonreview.com/sociowave-review
(3) AI Partner & Profit Review: https://sumonreview.com/ai-partner-profit-review
(4) AI Ebook Suite Review: https://sumonreview.com/ai-ebook-suite-review
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