fourcc identifier

Fourcc actually represents a four-byte integer in C/C ++. The method in Baidu encyclopedia is # Define make_fourcc (A, B, C, D) \ (uint32_t) d) | (uint32_t) c) There is a simpler way to directly use characters to represent fourcc. Int fourcc = 'abcd '; 0x61 62 63 64 'A 'B' C 'D' It can also be used in Enumeration Enum playeraction { Pa_move =

Guid: that is, globally unique identifier (globally unique identifier) is also called UUID (universally unique identifier ). Therefore, the guid is the UUID. GUID is a 128-bit long number, which is generally expressed in hexadecimal notation.AlgorithmThe core idea is to combine the machine's Nic, local time, and a random number to generate a guid. Theoretic

(Original link: http://blog.csdn.net/carefree31441/article/details/3998553)The UUID meaning is a universal unique identifier (universally unique Identifier), which is a software construction standard and is also organized by the Open Software Foundation, OSF, in a distributed computing environment ( Distributed Computing Environment, DCE) part of the field. The purpose of the UUID is to allow all elements i

This error usually occurs because the bundle identifier is not set correctly. 1. If the project is directly downloaded from the Internet, first check the project targets under the bundle identifier has been set. If the SDK is a demo project, Bundle identifier is usually blank and needs to be filled in manually. Then select the developer account in the signing te

Label:CREATE TABLE SALARY ( null, empname Varchar2 (), empsalary Number, hiredate DATE, PRIMARY KEY (EMPID), ); INSERT into SALARY VALUES (1, ' Jiang xx ', 1015.32,to_date (' 19950702 ', ' YYYYMMDD ')); COMMIT; * FROM SALARY;Above how to run all prompt identifier invalid, check half a day only found that the last line in the end more ","In addition, there may not be a list of column names and reserved words are d

Zero basic learning java (2): identifier, java identifier 1. identifier: (1) The character sequence used by Java to name various variables, methods, classes, and other elements is called an identifier. (2) Any place where you can name yourself is an identifier. Ii. Defining

HDOJ 2024 legal identifier of C language (water question, talk about identifier)C Legal identifier Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission (s): 42681 Accepted Submission (s): 17117Problem Description input a string to determine whether it is a legal identifier of

When Hiberate is updated, the following error occurs: a different object with the same identifier value was already associated with the session, identifier The Hibernate framework is used. The Service class has the following method: 1 public boolean saveOrUpdateTroop (TroopsInfo o, Boolean save) {2 if (save) {3 Map When the actual execution is performed, the following error will be reported in row 13th (ju

Mysql defines the primary key as the automatic growth identifier type and the mysql identifier This section describes how to define a primary key as an Automatically increasing identifier type in mysql. 1. Define the primary key as the automatic growth identifier typeIn mysql, if the table's primary key is set to auto_

JavaScript generates GUID (globally unified identifier) and guid unified identifier GUID (globally unified identifier) refers to the number generated on a machine, which ensures that all machines in the same time and space are unique. Generally, the platform provides APIs for generating guids. The generation algorithm is very interesting. It uses Ethernet Card ad

Naming Convention (3) Name and identifier of an identifier Naming Conventions (1) Case sensitivity conventions Naming Conventions (2) general naming conventions Program set and DLL name An assembly is a deployment unit and also represents the identity of the hosted program. Although the Assembly can be distributed in one or more files, an Assembly generally corresponds to only one DLL. The Assembly of th

1. Check the serial number. You do not need to connect to your computer. Enable the settings of the IOS device. 2. if you view it on your computer, you can open iTunes and plug in the iOS device. There is a serial number in the summary of the device. Click this line to change it to the identifier (udid ), apple always has some abnormal viewing methods. There is no way to copy this part. The serial number is okay, and the udid will be copied to the de

Problem Description:VC + + Program compile-time prompt error: "HANDLE": an undeclared identifier and many other error prompts, as follows: C2065error C2065: "HANDLE": Undeclared identifier Error C2146: syntax error: Missing ";" (in front of identifier "Hfind") Error C2065: "Hfind": Undeclared identifier error C2065: "I

Error reason: The bundle ID of IPhone app, watch app and watch extension does not conform to Apple's naming convention. Its naming conventions must follow a fixed format. The solution is as follows: The following three items (project name my) are under the Targets of the project: My, my WatchKit app, my WatchKit extention General-> Identity under the Bundle identifier are fixed written, do not casually change. For example: com.xxx.my Com.xxx.my.

Translation: Identifier Name, identifier naming rules This article is a translation of the mariadb official manual: Identifier Names. Original article: https://mariadb.com/kb/en/library/identifier-names/Https://mariadb.com/kb/zh-cn/library/identifier-names/ I submitted to th

Swift identifier and keyword, swift identifier and Any computer language is inseparable from identifiers and keywords. The following describes the Swift identifiers and keywords in detail. Identifier An identifier is the name specified for a variable, constant, method, function, enumeration, struct, class, protocol, et

When I submit the app, I always prompt bundle identifier inconsistent, target general's bundle identifier There are always three gray horizontal lines, and later found that because my project name is Chinese, change to English is goodIf you want to modify the bundle identifier, you can modify it in two places in the project:1.targets of General->identity->bundle

Error of JS missing identifier in IE, jsie identifier You can find the source code based on the number of lines reported for the error. The Code is as follows: If (opts. display. class! = '') {Response (list).addclass(opts.display.css );} In fact, this sentence is used to determine whether the class attribute of the opts object's display has no value. Otherwise, it will be processed accordingly. The synt

06: valid C identifier, 06 identifier06: Legal C identifier View Submit Statistics Question Total time limit: 1000 ms Memory limit: 65536kB Description . C language identifier requirements: 1. Non-reserved words; 2. Only letters, numbers, and underscores (_) are allowed. 3. Do not start with a number.

. Net Assembly identifier and binding context,. net identifier Context I encountered the Assembly dependency problem when implementing Autofac scanning and self-loading Assembly implementation IOC. I searched the internet and found no description about the Chinese world. Take several articles from google, translate and understand them, and then write some small demos, as shown below: Original article: Http