object relational mapping with activerecord

... xix ■■■ Object- Relational Mapping Concepts ■CHAPTER Getting Started with Object- Relational Mapping Introduction to Object- Relational Mapping ... 2008 8:54 AM Pro LINQ Object Relational Mapping with C# 2008 ■■■ Vijay P Mehta Mehta_965-9FRONT.fm Page ii Thursday, June 12, 2008 8:54 AM Pro LINQ Object Relational Mapping with C# 2008 Copyright ... sort of metadata mapping This is fundamentally the core of object- relational mapping (and yes, LINQ to SQL and EF support mapping business objects to database tables with metadata) Object caching:...

Ngày tải lên: 12/05/2014, 15:53

Ngày tải lên: 25/11/2015, 15:55

... abstraction with objects, encapsulated classes, communication via messages, object lifetime, class hierarchies, and polymorphism Fundamental Properties of an Object- Oriented System Abstraction with objects ... to objects, once you know what your objects are Designing with objects can be challenging, and it is not always easy to find the right objects for your model, but once you learn to think in objects, ... encapsulated objects can respond to messages and send their own messages to others objects in response Objects in the system interact via well-defined messages with other objects in the system Object...

Ngày tải lên: 22/08/2013, 14:52

... underlying tables with relational SQL or treat them as an object Using object views, you can migrate a legacy relational database to a relational -object database While creating an object view does ... create object tables directly based on our user-defined data types Object tables can be modified using either relational SQL or object- relational SQL 14.2 Object Tables Now that you've seen the object ... can create object views against relational tables to create an object face to a relational database or create object tables and access the column attributes as though they are part of relational...

Ngày tải lên: 29/09/2013, 09:20

... other objects, are called column objects Object Views An object view is a way to access relational data using object- relational features It lets you develop object- oriented applications without ... s About Oracle Objects s Advantages of Objects s Key Features of the Object- Relational Model Introduction to Oracle Objects 1-1 About Oracle Objects About Oracle Objects Oracle object types are ... is a relational table with an object type as the datatype of one of its columns Objects that occupy columns of relational tables are called column objects See Also: "Row Objects and Column Objects"...

Ngày tải lên: 21/12/2013, 04:16

... Constructors and destructors CreateObject() NewObject() AddObject() and NewObject() Passing parameters to objects SCATTER… NAME… 31 31 34 34 35 35 36 viii Object references Object lifetime THIS, THISFORM, ... containers because each object can only live within a single host Also, objects that live within a container cannot move to other objects With referential aggregation, objects are free to travel ... Advanced Object Oriented Programming with Visual FoxPro 6.0 How to add objects to a container Defining contained objects with the visual designers is easy The programmer simply drops an object...

Ngày tải lên: 21/12/2013, 20:15

... "message" • Copy an object reference to another For example: set anObject1 to anObject2 • Test whether two object references refer to the same object For example: if anObject1 = anObject2 Micro Focus ... handle in an object reference with a new one if you have finished with it When a program has finished with an object, it should destroy it Declaring Classes If you want to use an object in a program, ... can hold an object reference for any factory or instance object Untyped object references are also known as universal object references A typed object reference can only hold an object reference...

Ngày tải lên: 12/02/2014, 23:20

... Simplifications of Objects What Do I Do After I’ve Defined a Class? Instantiating an Object of a Class I Have an Object Now What? Why Hide the Data Inside an Object? Getting Started with Objects Developing ... Adding a Toolbox Object to a Windows Form Changing the Text of a Label Object Running the Program Summary CHAPTER 2: UNDERSTANDING OBJECTS Understanding Objects Everyday Use of Objects Class Properties ... 10/8/2012 8:54:40 AM BEGINNING Object- Oriented Programming with C# ffirs.indd iii 10/8/2012 8:54:40 AM ffirs.indd iv 10/8/2012 8:54:40 AM BEGINNING Object- Oriented Programming with C# Jack Purdum ffirs.indd...

Ngày tải lên: 15/02/2014, 07:20

... Revisited 347 Object Properties 348 Comparing Objects 348 Copying Objects 350 Passing Objects as Parameters 6.13 261 261 352 Case Study: Arithmetic of Rational Numbers 353 Garbage Collection and Object ... fundamentals of object- oriented programming with Java ■ We provide an early introduction to object- oriented design approaches, such as using noun and verb analysis to help identify objects and methods ... your computer Pedagogical Features Objectives Each chapter begins with a set of learning objectives Case Studies Many chapters contain fully designed case studies with comprehensive documentation,...

Ngày tải lên: 05/03/2014, 13:20

... ideas and objects This conversation involved both telling and asking about place and detail Your maps are in conversation with your users With computer-based mapping, especially web mapping, interactivity ... indeed, want mapping on our web application, why map with Drupal specifically? The number-one reason is that it is easy to get started with mapping in Drupal As we will describe in this book, with just ... for web-based mapping, so often you will see APIs using longitude first Web mapping, specifically, tile-based mapping (see Mapping Terms” on page 129 for more details on tile-based mapping) presents...

Ngày tải lên: 08/03/2014, 18:20

... that you interact in an object- oriented world If you want to go to the store, for example, you interact with a car object A car object consists of other objects that interact with each other to accomplish ... As I noted earlier, we live in an object- oriented world You are an object You interact with other objects To write this book I am interacting with a computer object When I woke up this morning, ... Internally, the button object interacts with a printer object, which interacts with the printer to accomplish the task of printing the page OOP concepts started surfacing in the mid-1960s with a programming...

Ngày tải lên: 14/03/2014, 23:20

... operator Object Oriented Two objects with different values object_ data object_ data 200 object1 Objects of the class exampleclass Specifications for exampleclass objects object_ data 350 object2 ... object1 .member_function2(); object2 .member_function1(350); object2 .member_function2(); } Object Oriented Defining Objects s exampleclass object1 ,object2 ; defines two objects, object1 and object2 , of class ... Transact with banks Object Oriented Objects s Represent an entity in the real world s A concept or thing with defined boundaries that is relevant to the problem we are dealing with s Objects serve...

Ngày tải lên: 16/03/2014, 01:20

... each object is defined, so there is a set for each object Object Oriented Objects, data members and member functions in memory Object Object data data mem_function1() data data mem_function2() Object ... we use const with a pointer, there are two objects involved One is the pointer itself and the other is object pointed to Prefixing a declaration of a pointer with const makes the object, but not ... not know how many objects we want to create Object Oriented Pointers to objects (Contd.) Use new to create objects while the program is running date *today_ptr; //pointer to an object of type date...

Ngày tải lên: 16/03/2014, 01:20

... Reusability: An object is an entity which has bundles of properties and methods and can interact with other objects An object can be sufficient or it may have dependencies over other objects But an object ... ArrayObject Array to Object Accessing Objects in Array Style Serialization Magic Methods in Serialization Object Cloning Autoloading Classes or Classes on Demand Method Chaining Life Cycle of an Object ... Object- Oriented Programming with PHP5 Learn to leverage PHP5's OOP features to write manageable applications with ease Hasin Hayder BIRMINGHAM - MUMBAI Object- Oriented Programming with PHP5...

Ngày tải lên: 22/03/2014, 23:20

... public: void display(); }; Object Oriented Scope rules (Contd.) void main() { first object1 ; second object2 ; object1 .display(); //no function overloading takes place object2 .display(); } • The ... function Object Oriented Passing references (Contd.) Do not think of a reference as a pointer to an object A reference is the object It is not a pointer to the object, nor a copy of the object ... friend function is called like func(xobject), while a member function is called like xobject.func() • Designer can select the syntax that is considered most readable Object Oriented Friend classes...

Ngày tải lên: 23/03/2014, 04:21

... assignment operator) Object Oriented Programming with C++/ Session 4/ 42 of 49 Conversion between Objects (Contd.) objectA = objectB; objectA: object of destination class objectB: object of source ... //temporary object temp.counter = counter + a.counter; return temp; //return temp object } s Now we are able to perform addition of objects with a statement, obj3 = obj1 + obj2; //objects of class ... another object s2 and contains an object as its argument s s If constructor with an object as its formal argument is not defined , the compiler itself initialises the data members of s2 with s1...

Ngày tải lên: 23/03/2014, 04:21

... constructor Derived(int c): Base(c){} //constructor with one-arg Object Oriented }; Constructors (Contd.) When you declare an object of the derived class, with the statement Derived obj; it will cause ... member of class jet with the value in y Similar to declaring an object of class engine with the statement, engine eobj(y); Variables of any data type can be initialised like this Object Oriented ... of the base class With the keyword private in the derived class declaration, objects of the derived class in main() cannot even access public member functions of the base class Object Oriented...

Ngày tải lên: 23/03/2014, 04:21

... ptr; } Object Oriented Programming with C++ / Session / 43 of 44 Virtual destructors (Contd.) s Virtual functions bind to the code associated with the class of the object, rather than with the ... classes Object Oriented Programming with C++ / Session / of 44 Multiple Inheritance (Contd.) Base Teacher class Student Teaching assistant Base class Derived class Object Oriented Programming with ... hierarchy Object Oriented Programming with C++ / Session / 19 of 44 Virtual Base Classes (Contd.) s s Virtual base class is represented by a single object of the class Note the difference with normal...

Ngày tải lên: 23/03/2014, 04:21