what is morphia

Note: This article comes from " what is Ooa in Java?" What is Ood? What is OOP? "In Java, what is OOA?

. Second, by abandoning individual things in the details of the differences, extracting their common characteristics and get a group of things abstract concept.Abstraction is the most widely used principle in object-oriented methods. Abstract principles include two aspects of process abstraction and data abstraction.Process abstraction means that any sequence of operations that completes a deterministic function can be viewed by the user as a single e

http://bbs.elecfans.com/forum.php?mod=viewthreadtid=207422highlight=What is the pull current, what is the sink current? What is the absorption current?Pull current and sink current is t

What is cocoa? What is Xcode? What is the framework? What is cocoa?Many libraries (libraries) and tools built into the NeXTSTEP (operating s

Everything is different from the first to the fourth year. From the first to the fourth day, there is no such thing as a basket. The food is not so sweet, and the sleep is not so comfortable. How many people have troubles with work and nonsense.Http://bbs.sei.ynu.edu.cn/viewthread.php? Tid = 27480 extra = Page % 3d8 M

What is a scripting language? What is a compilation language? What is the difference between the two ?, Script language compilation What is

verification code is a bad user experience, not necessary to not easily use the verification code, many of the current practice is that if a short period of time to submit a form is not successful after the request to provide a verification code, This will get a better user experience. Add: Firewall is an imp

What is a construction method?The construction method is called when the new object is created. Each class has a constructor method, and if the programmer does not provide a constructor for the class, the Java compiler creates a default constructor for the class.What is a co

This problem has actually plagued me for a long time. I have asked many people what is "null? What's the purpose? Most people answer: "null is a special 0 defined by the system. Pointing your initialized pointer to it can prevent the evil effects of" wild pointer. " Today, I met a C-language pen question, which is

previous versions of FF, the plug-in vulnerability has been fixed, so FF cannot complete the dark Data Warehouse through memory. Because the file operation FF does not provide support (data transmission cannot be completed through cookie cross-origin), this technical method can only be used in IE. 5. In combination with the preceding methods, when accessing website a, request website B to complete data processing and obtain the desired results based on the returned ID. The disadvantage of this

, depending on the situation. The running of a thread requires the use of the computer's memory resources and CPU. The concept of multithreading Multithreading refers to the technique of implementing concurrent execution of multiple threads from software or hardware. Multithreading is to accomplish many tasks synchronously, not to improve the efficiency of the operation, but to improve the efficiency of the use of res

In general, creating a new page in VS creates two types of files: one is the suffix. cs and one is. aspx.Simply put, the. cs file is typically implemented in the inside, and. aspx is the interface effect.The difference:. cs files are written in. NET code, including methods and fields, and. aspx files are written in HTM

What is the definition in C language? What is the meaning of the statement? What is the difference between them ?, Meaning difference In the C language, we may be very familiar with definitions and declarations, but we may not re

int *p = NULL;P: The address of the memory pointed to by the pointer p*p: The value of the memory address pointed to by the pointer pp: The address of the pointer p1 #ifndef _code_pointer_demo01_h_2 #define_code_pointer_demo01_h_3 4#include 5#include string.h>6#include 7 8 intMain () {9 Ten intA =Ten; One A Char*P1 =NULL; - - Char**P2 =NULL; the -P1 =0x111111; -P2 =0x222222; - +P1 = A; - +printf"P1 =%d, p1 =%d, *p1 =%d \ n", p1, p1, *p1); Aprintf"A =%d, a =%d \ n", A, a); at

Recently in the development of a project, want to reference the bootstrap file, has been wrong, so want to study the next relative path and absolute path relationship, to see how they are different. What is an absolute path and a relative path? DIVCSS5 for everyone to introduce the basic knowledge of relative path and absolute path, function, usage and other knowledge. Relative path: The directory path tha

What is Flex? What is the relationship between flex and flash? What problems does flex solve? What is the relationship between flex and J2EE/. Net? Flex

Scope is for variables, for example, we create a function that contains a function, and now there are three scopesGlobal scope ==> function 1 Scope ==> function 2 scopeThe scope is characterized by first finding it in its own variable range, and if not, it will look up along the scope.Such as:var a = 1;function B () { var a = 2; Function C () { var a = 3; Console.log (a); } C ();}