1 Q extended data needs to be written into Three DGI: a001, 8020,9020
1.1 a001 extended application configuration
DGI
Length
Value (example)
A001
7 * n
15 01 00 00 ff 00 00Data is organized in 7 bytes as a unit. Each unit corresponds to the configuration information of an extended application file. The parsing is as follows:1-byte
Extended partitions in Linux format
If you encounter the following error when formatting a disk in Linux, it indicates that you are formatting an extended partition.
[root@GETTestLNX06 ~]# mkfs.ext4 /dev/sdb1
mke2fs 1.41.12 (17-May-2010)
mkfs.ext4: inode_size (128) * inodes_count (0) too big for a
filesystem with 0 blocks, specify higher inode_ratio (-i)
or lower inode count (-N).
You canno
ArticleDirectory
Extended bacos paradigm
BNF is a language used to represent context-independent grammar. It describes a type of formal language. Although the bacos paradigm can also represent the syntax of some natural languages, it is still more widely usedProgramThe syntax representation of the design language, instruction set, and communication protocol. Most textbooks in programming language or formal semantics use the bacos parad
There are three hard disk partitions: Primary disk partitions, extended disk partitions, and logical partitions.
A hard disk can have a primary partition, an extended partition, or only one primary partition can have no extended partition. There are several logical partitions.
The primary partition is the boot partition of the hard disk. It is independent and t
Euclidean algorithm: A fast algorithm for the greatest common divisor of two integers. That is what is commonly referred to as the "Euclidean method". Given two integers a, b. Euclid can find A, B greatest common divisor in the complexity of log (max (|a|, |b|)) in the worst possible degree. The computational method of time complexity is also very interesting, see "Introduction to Algorithms".Prove the correctness of Euclid's algorithm:A can be expressed as A = kb + R, and r = a mod bWe're going
this time x=1,y=0;When 2,ab!=0Set AX1+BY1=GCD (A, b);bx2+ (a mod b) y2=gcd (b,a mod b);According to the naïve Euclid principle there is gcd (A, B) =gcd (b,a MoD);Then: ax1+by1=bx2+ (a mod b) y2;namely: ax1+by1=bx2+ (A-(A/b) *b) y2=ay2+bx2-(A/b) *by2;According to the identity theorem: x1=y2; Y1=x2-(A/b) *y2;This gives us a way to solve x1,y1: The value of X1,y1 is based on X2,y2.The idea above is defined recursively, because the recursive solution of GCD will always have a time b=0, so recursion
+bx2-(A/b) *by2;According to the identity theorem: x1=y2; Y1=x2-(A/b) *y2;This gives us a way to solve x1,y1: The value of X1,y1 is based on X2,y2.The idea above is defined recursively, because the recursive solution of GCD will always have a time b=0, so recursion can end.Extended Euclid's Recursive code:View CodeExtended Euclidean non-recursive code:View CodeThe application of the extended Euclidean algorithm mainly has the following three aspects:(
Extended development of ceph management platform Calamari. The extended development of the ceph management platform Calamari has not written logs for nearly half a year. maybe you are getting lazy. However, sometimes writing something can help you accumulate it, and you can record the extended development of the ceph management platform Calamari.
I haven't writte
1. What is extended attributes?
Many ORM frameworks support such operations. Take the table in section 1 as an example,
The Subject objects such as TeacherID are usually used in this way.
Subject subject = Subject.FindByID(1); string TeacherName = subject.Teacher.Name;
In this case, it is directly associated with the Teacher object, instead of operating TeacherID. How is this done? Will XCode be automatically completed?
F
Schemaexplorer
Allow us to obtain information about some objects in the database. If you are using
SQL Server2000
Database, you can get a lot of useful information about objects through extended attributes. For example:
SQL Server
An extended attribute is defined to identify the unique field in the table. You can write it in the template as follows:
Identity Field = Foreach (Columnsch
A data dictionary is a collection of related descriptions of data and objects in a data model that helps programmers and users look up data and objects when they create applications and reports. When you use the data model, it is ideal to create a data dictionary. When databases are very small, developers often use Embedded SQL Server tools and scripts to create data models. But when the database model becomes an enterprise-class data model and has the corresponding complexity, the complexity of
Euclidean algorithmNote: Euclidean algorithm is an algorithm used to calculate greatest common divisor. The main code implementations are as follows:int gcd (int A,int b) { return !b?a:gcd (b,a%If this is the case, it will be repeated using this formula until a n"> number in A and B m">becomes 0"> 0 , and the greatest common divisor can be obtained. For example: We ask GCD (15,30)Run as follows: GCD (15,30) =gcd (30,15) =GCD (15,0) 15 at this time is gcd (15,30)Proof Process:Set g = gcd (A,
The Raspberry Pi has just installed the Ubuntu Mate system, opening the home folder and discovering that there is not enough spaceThis is not an extended store to the entire SD card, but the Raspi-config command in Ubuntu Mate is not yet available.There's a way here.After you enter sudo fdisk/dev/mmcblk0,Enter D 2 n P 2 (key on keyboard) and press two times enter (enter)Then press W to exit and restartThen open the terminal inputsudo resize2fs/dev/mmc
First, the purpose of the experiment1. Understanding the composition and role of the TPM security chip2. Mastering the principle and function of the trust chain extension of the computing platform3. Master IMA's working principle and functionIi. contents of the experimentThe criterion of the trust chain extension is "Measure before load", which is the first measure of the next stage component before it is loaded and handed over to it, documenting the component metrics and protecting the measure
Some difficult things about the "extended Knowledge 3" arrayExtended Directory1. array+ 12. array+13. array[0]+ 1Questions about array+, array+ 1 and array[0]+ 1 are particularly difficult to understand ~-~. So I'll explain it today.Since the storage unit for each element in the array is continuously allocated, you can access the array as a pointer, which is the first address of the number.such as: intarray[100];Array is the first address of the array
= = Xmlpullparser.end_tag) {if (Received.NAME.equals (NAME)) {done = true;}}} return received;}} We need to add the extended provider to the Providermanager when we use smack.Providermanager.getinstance (). Addextensionprovider (Received.name, Received.name_space, New ReceivedProvider ()); We want message to add receivedMessage message = new Message (); Message.setto ("to");//target Message.setfrom ("from");//source Received received = new received (
developed from Swig and is used specifically for Python calls to C + + modules. Note that SIP is not the same thing as the SIP in VoIP, where the SIP is extended python, and the SIP in VoIP is a communication protocol and don't confuse it.Attention:Need to install the Python SIP library;1. Write C + + module1.1 Writing header filesFile name: SipCall.h file contents:Class Testmode{Publicint Max (int i1,int i2);};1.2 Writing module ContentFile name: Si
Objective: Through experience, comparison, selection, to find suitable for their own JOOMLA extensions, including components, modules, templates.
Environment: Win7 + XAMPP 1.7.1 + Joomla 1.5.14. For a more realistic experience, try one of the extensions as much as possible in a clean Joomla environment: After installing JOOMLA, import the sample data and install an extension when there are no other third-party components.
Shoutbox is shoutbox rewrite of the Chinese comment module (author: ufon
Preparing to install the software (download)1> [Redis]Http://redis.googlecode.com/files/redis-2.4.3.tar.gz2> [Phpredis]Https://github.com/owlient/phpredis/tarball/masterRedis installation skipped1> "Installing Phpredis extensions"TAR-ZXVF owlient-phpredis-2.1.1-1-g90ecd17.tar.gz cd owlient-phpredis-90ecd17 /usr/local/php/bin/phpize ./configure--with-php-config=/usr/local/php/bin/php-config make do install #执行完make Install will generate #Installing shared extensions: /usr/local/php//lib
In general, we use third-party extensions during the development of PHP, which is especially important when we look at the information about PHP extensions. In general, we look at the extension information, are directly through the cat *.ini file, so the efficiency is very low, because sometimes you will not know the INI file under what path, although the search is easy to find, but overall is still troublesome.So we need to look at the extended infor
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