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Oracle Study Notes 12 subroutines (stored procedures, custom functions) and packages, oracle Study NotesSubroutine: A named PL/SQL block, which is compiled and stored in a database. Subprograms: 1. declaration Part 2. executable part 3. exception Handling (optional) subprograms: 1. process-execute some operations 2. function-execute the operation and return the value Advantages of subprograms:Modular decom

C ++ Study Notes-dynamic memory and smart pointer Analysis and Study Notes Analysis Our program uses the following memory: In c ++, after a common object leaves its scope, its destructor will be automatically called to destroy the object and release the memory it occupies, without memory leakage. To make it easier to use dynamic memory, the new standard library provides two smart pointer types to manage dyn

Study Notes for common operation functions of JavaScript strings and javascript Study Notes String Introduction Use single or double quotation marks, such as 'hello', "World", but the single quotation marks cannot start or end with the same as the double quotation marks. Use them in different ways. If you want to print single or double quotation marks, you can use the Escape Character \ '(single quotation m

PHP Study Notes (2): Variable details and Study Notes I. Introduction to PHP Variables 1. SyntaxCopy codeThe Code is as follows:// PHP is a weak language, and the variable type is determined by the stored value.// Strong language: int a = 1$ Variable name = Value 2. Naming rules 1). Cannot begin with a number2). You cannot use the PHP operator (+-x/% )3). You can use the PHP keyword.4). Case Sensitive (only

GeekBand's first week study notes and geekband Study NotesClass member Modifiers (Class member modifier) Public: can be accessed by any function or class. Private: cannot be accessed by external functions and classes of non-friends; Protected: can only be accessed by itself and its sub-classes;Friend (youyuan ): Modify non-operation membersYou can specify an external function or class as an operating class'

CSS3: Case Study of image flip switching and analysis of important properties; css3 Case Study Image flip switching. When CSS3 is not used, JavaScript is usually used for animation. Meanwhile, the width and left of the element, or height and top of the element are operated to simulate the flip effect, change src or z-index as appropriate to implement image switching. Inadvertently found CSS3 solution, http:

[Java Study Notes] java language core-this keyword of object-oriented, java Study NotesI. this keyword Embodiment: You can useThis keywordIn the constructor to call other constructor.Principle:Indicates the current object.This is the reference of the object to which the function belongs.Simply put, this indicates the object that calls the function with the keyword this. 1. differentiate between local varia

Html dom (study Note 1) and htmldom Study Notes Well, I have been working for a while, and I have a deep understanding of programming. I used to think that HTML, CSS, and JAVASCRIPT are relatively simple. I can simply read online tutorials, w3C is a website that I often go to learn this knowledge. I am very grateful to her for letting me learn more about the front-end, but now I don't read it like this, fro

Struts2 Study Notes (1)-Environment setup, struts2 Study Notes 1. Create a Web project and import the main jar package of Struts2 Create a Web project in MyEclipse and add the required jar package under the lib directory: 2. Create a jsp page 1) Create the test. jsp page: 1 2) create a success. jsp page: 1 3. Create an Action: 1 public class TestAction {2 public String test() {3 return "succe

Linux Study Notes (1)-file processing commands, linux Study Notes List Files And DirectoriesLs (list)# LsEnter ls in the terminal and press enter to list the files and directories in the current directory, excluding the hidden files and directories.# Ls-List all files in the current directory# Ls-alList details of all objects for the current target Create directoryMkdir (make directory)# Mkdir testCreat

Linux Study Notes 1-ubuntu installation and basic settings, Study Notes 1-ubuntu In the past few days, we have already met Huawei, and we have two e-mails with Alibaba. It looks like everything went smoothly. However, it seems that the interviewers of various major companies will ask more or less questions about programming skills in the linux environment, and I am quite involved in this field, I chose the

Struts2 study notes (8) -- International, struts2 Study Notes 1. Introduction to Struts2 Internationalization Internationalization (i18n): to internationalize a program, you must first provide the resource files required by the program. The content of the resource file is a key-value pair. Resource file naming can be in the following three forms: BaseName_language_country.properties BaseName_language.pro

Linux Study Notes (4)-Use of the text editor vi and Study Notes vi Three editing modes of vi Command mode)In this mode, you can control the movement of the cursor, delete characters, delete rows, and copy and move a paragraph. Insert mode)Only in this mode can you enter characters Last line mode)In this mode, you can save the file or exit Vi, set the Editor Environment, search for strings, and list the

Linux Study Notes (3)-file system, linux Study Notes Three types of files Common files: including text files, data files, and executable binary Program Files Directory file: in linux, a directory is viewed as a special file, which forms the tree structure of the file system. Device File: the device is also seen as a file, such as your mouse, your hard disk, and so on in linux. File type id

[Study Notes] [C Language] structure, Study Notes C Language 1. Three Methods for defining struct Variables1> first define the type, then define the variable (separate definition)Struct Student{Int age;};Struct Student stu;2> define both types and variablesStruct Student{Int age;} Stu;Struct Student stu2;3> define a variable while defining the type (the type name is omitted)Struct{Int age;} Stu;2. struct ty

One of Study Notes (apply for test public number), study notes public1. Apply for an intranet ip ing Internet domain name account : Http://www.nat123.com/Pages_2_32.jsp Tutorial address: Http://jingyan.baidu.com/article/76a7e409b50625fc3b6e15a9.html 2. Apply for a test management account. Note that this test account cannot be logged on to a real public platform. Just for testingApplication addre

Basic python Tutorial Study Notes --- (4) dictionary and python Study NotesSequence is a data structure in python, and ing is another. Mapping refers to a value by name. The only ing structure built in python is a dictionary. The values in the dictionary have no special order, but are stored in a specific key. Keys can be numbers, strings, or even tuples.1. Usage of dictionaries:The sequence uses indexes to

Spring Study Notes 1. spring Study Notes Description of the Two. XML files. Procedure: 1. Add the jar package to the lib folder. 2. Configure web. xml to configure the front-end controller dispatcherservlet 1 3. Create the springmvc configuration file under web-inf with the name [servlet-name]-servlet. xml 4. Configure handlermapping in the springmvc-servlet.xml and find the corresponding controller acc

Java Study Notes-JDBC6 (21), study notes jdbc6 1. Use a dynamic proxy to write the connection pool Design: Proxy target: Native connection. Proxy purpose: Modify the close method so that the close method cannot close the connection and actively detaches the connection. Communicate with the thread through a dynamic Proxy: 1: proxy for Cxonnection. 2: The Connection is obtained through synchronization. If th

Java Study Notes-JSP 1 (32), java Study Notes Servlet as a dynamic web page development technology is too unreliable. In particular, when writing a page, you need to specify the template tag of the page and process a lot of business logic. Therefore, it is complicated. Think: Why is it so hard for Servlet to write a page? The main reason is that Servlet actually writes labels in java. For the above reasons,