Experiment 2 of Linux operating system: process communication
Further improve the ability of C programming in Linux environment, understand and be familiar with a variety of IPC mechanisms supported by Linux. As a multi task and multi process operating system, information interaction between processes is inevitable. Inter pr ...
Posted by hobeau on Fri, 24 Sep 2021 12:17:51 +0200
Principle of image http://www.lizibuluo.com/8bit/ This website is a random drawing website, you can see a lot of small squares. These small squares are pixels. Pixels are composed of small squares of an image. These squares have a clear position and assigned color value. The color and position of the small squares determine the appearance of th ...
Posted by sovtek on Fri, 24 Sep 2021 12:05:45 +0200
[Oracle] CentOS 7.4 installation and deployment Oracle19c
In the production environment, according to the business development and project requirements of the enterprise, the business database will be selected according to the importance of the business, and the data model and database design ...
Posted by delfa on Fri, 24 Sep 2021 11:06:27 +0200
We all know that C language provides us with many built-in library functions, and these library functions need to refer to their respective header files when they are used.
This article is about several string related functions in < string. H >.
1.strlen() - count the number of characters in the string
one point one   ...
Posted by sweyhrich on Fri, 24 Sep 2021 10:28:34 +0200
Transaction processing in Spring
1. What is a transaction
speak mysql When a transaction is proposed, a transaction refers to a group sql A collection of statements with multiple entries in the collection sql sentence
It may be insert, update, select, delete or a combination. We hope these multiple sql statements can suc ...
Posted by pearllysun on Fri, 24 Sep 2021 10:17:06 +0200
Clue barNote barWrite a calculator programSee Appendix 1Why is movable type printing called one of the four great inventions in ancient China?As shown in Figure 1-1 1. Words can be directly replaced and maintainable.2. The completed words can be reused. 3. Words can be expanded freely 4. The characters can be arranged horizontally and vertica ...
Posted by spillage on Fri, 24 Sep 2021 02:50:31 +0200
The description of each component is shown in the table below:
assemblyeditionThe serverInstallation tutorialeffectcanal1.1.5canal1, canal2, canal3canal HA installation + mysql multi node automatic switchingzookeeper3.6.3canal1, canal2, canal3zookeeper fully distributed installationmysql8.0.25canal1, canal2MySQL master mast ...
Posted by jalperin on Fri, 24 Sep 2021 00:36:17 +0200
With the updating of java, the composition of the interface has introduced some new content as follows.
Composition of the interface
Constant: public static final (this default modifier can be omitted)Abstract method: public abstract (this default modifier can also be omitted)Default method (Java8 started)Static met ...
Posted by menios on Thu, 23 Sep 2021 21:25:18 +0200
Concerning the definition of prime number: prime number is also called prime number. A natural number greater than 1 is called a prime number if it cannot be divided by any other natural number except 1 and itself; otherwise it is called a total number (specifying that 1 is neither a prime number nor a sum).
Algorithms for generating prime num ...
Posted by phpstuck on Thu, 23 Sep 2021 21:10:41 +0200
This article was intended to write about spring transactions, but JdbcTemplate-related functionality is used in most cases of transactions, so let's start with JdbcTemplate.
What is JdbcTemplate?
To review, the original way to operate db in java is pure jdbc. Whether every operation db needs to load database drivers, get connections, get Prep ...
Posted by buckboru on Thu, 23 Sep 2021 18:39:19 +0200