Tag：routine
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Time：2020-12-4
Basic operation Open database file int sqlite3_open(const char filename, sqlite3 ppDb); This routine opens a connection to the SQLite database file and returns a database connection object for other SQLite programs.IffilenameIf the parameter is null or ‘: memory:’, then SQLite3_ Open() will create a memory database in RAM, which will only last for the duration […]
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Time：2020-11-30
Original address:https://miguendes.me/everythi… By Miguel Brito Translator: Dean Wu This article discusses PythonnamedtupleThe key usage of. We will introduce from the simple to the deepnamedtupleThe concept of. You’ll learn why and how to use them, so the code is simpler. After studying this guide, you will love to use it. Learning objectives At the end of […]
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Time：2020-11-10
Hello, everyone. I’m a ruffian. I’m a real technical ruffian. What ruffian Heng shares with you today isDifferent entry settings in IVT may cause abnormal flight after i.mxrt1xxx series starts app。 A question post on the official forum of NXP《RT1015 dev_cdc_vcom_freertos reset entry failed》This is a problem encountered by Qisda, a colleague of ruffian Heng, […]
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Time：2020-10-3
Nothing can resist swallowing all time. ——Tagore In the last article, we wrote about using El tree to trigger the default click event of department management. However, when our department name is too long, we find that the display effect is not satisfactory. After viewing the document, we can only realize it indirectly. With the […]
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Time：2020-9-24
Test environment: CentOS 7.164 bitPurpose: to show the general usage of docker (installation, general operation, import and export, etc.)Others: for principles, please refer to the extended reading at the end of the article. This paper does not make in-depth discussion, and the method is not unique 0x01 about installing docker Run it directly in Linux […]
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Time：2020-9-24
Update system #Replace system source cd /etc/yum.repos.d mv CentOS-Base.repo CentOS-Base.repo.old curl -o /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo yum clean all yum makecache yum update -y #Modify the host name hostnamectl set-hostname yourhostname General environment configuration yum install zsh git lrzsz unzip tree -y nodejs curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.35.1/install.sh | bash nvm install 12.14.1 nginx yum info nginx yum install […]
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Time：2020-9-1
Reference routine explanation 1、 Display demo: 1. Hardware: Figure 1.1 schematic diagram of nixie tube module It can be seen from Figure 1.1 that MCU controls the nixie tube drive IC through two pins of DAT & CLK (I2C), so as to control the display of nixie tube; open the tm1650 / […]
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Time：2020-8-27
In the process of using Oracle, there will be all kinds of problems and errors. Among them, ora-12899 is the problem that occurred when I imported the data to my local machine some time ago. Fortunately, this problem has been solved. Now let’s share the solution;Ora-12899 is caused by the character set. Chinese takes 3 […]
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Time：2020-8-15
begin try sentence end trybegin catch –ERROR_ Number() returns the error number. –ERROR_ Severity() returns the severity. –ERROR_ State() returns the error status number. –ERROR_ Procedure() returns the name of the stored procedure or trigger in which the error occurred. –ERROR_ Line() returns the line number in the routine that caused the error. […]
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Time：2020-7-6
Introduction: As we all know, in the field of big data / database, the storage format of data directly affects the read-write performance of the system. Spark is a fast, general and scalable big data computing engine based on memory, which is suitable for data processing scenarios in the new era. In “big data practice […]
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Time：2020-6-18
summary The browser uses a single thread to handle the main tasks of rendering.Each rendering process is processed by a main thread; The event loop mechanism is used to solve the problem that new tasks are inserted into the main line; IO thread receives other process messages and events through IPC mechanism and presses them […]
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Time：2020-5-12
By Michael ThiessenTranslator: front-end witSource: techalyst Take a look at it and get used to it this paperGitHubHttps://github.com/qq44924588… Has included more categories of previous high praise articles, as well as a lot of my documents and tutorial materials. Welcome to star and perfect, you can refer to the interview site review, hope we have something […]
