Tag：and
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Time：2021-4-8
Update the internal system During the current period, a new company is required to divide the parts of the company into special ones, and the company also needs to add the bugs of the company’s organizations. The definition of hyperf is provided in the system, which can be referred to as “hyperf”?2.0.21Type / P > […]
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Time：2021-3-17
= Only in the case of set and update, it is the same as: = in that the function of assignment is equal to that of others. In view of this, when implementing line number with variable, you must use: =. := Not only in set and update, but also in select. the following […]
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Time：2021-3-13
Now, Safari (technical preview version 106) and the preview version of Firefox (version 78) both support the new CSS:is()and:where()Pseudo class. Chrome implementation is still lagging behind. Using: is () to reduce repetition You can use it:is()Pseudo class to remove duplicate items from the selector list. /* before */ .embed .save-button:hover, .attachment .save-button:hover { opacity: 1; […]
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Time：2020-11-22
Two methods of GIT branching and merging Git add – A and git add. Git add – u are similar in function, but there are still some differences git add . : he will monitor the status tree of the workspace, which will be used to commit all changes in the work to the staging […]
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Time：2020-10-8
1、 Overview RZ, SZ are the command line tools for zmodem file transfer between Linux / Unix and windows. The advantage is that there is no need to open a SFTP tool to log in to upload and download files. Zmodem protocol is an error checking protocol for modem. Using zmodem protocol, 512 byte data […]
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Time：2020-8-19
At present, the differences are mainly in the scope of environmental variables 1. If you use “.” / “to execute, it can be understood that the program runs in a new shell and does not inherit the value of the environment variable of the current shell. At the same time, if the environment variable in […]
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Time：2020-7-7
The difference between call and exec in Oracle Today, I used Oracle to do the project. I found it interesting in the process of doing the project. I found some information and shared it with you In sqlplus: Tools provided by third parties (e.g. plsqldev) Summary: Exec is a command of sqlplus and can only […]
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Time：2020-4-5
A detailed explanation of the differences between Oracle date and timestamp 1. Date data type We are so familiar with this data type that we will think of date type when we need to represent date and time. It can store months, years, days, centuries, hours, minutes and seconds. It is typically used to indicate […]
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Time：2020-2-9
Sed usage: Sed is a very good file processing tool. It is a pipeline command. It is mainly processed in behavioral units. You can replace, delete, add, select data lines and other specific work. Let’s learn about the use of SED first The SED command line format is: Sed [- nefri] ‘command’ enter text Common […]
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Time：2020-1-6
Use of dllplugin and dllreferenceplugin Dllplugin and dllreferenceplugin realize the splitting of bundles in some way, and at the same time greatly improve the construction speed. 1. First add the build folder —– webpack.dll.config.js: var path = require(“path”); var webpack = require(“webpack”); module.exports = { //Array of modules to package entry: { vendor: [‘vue/dist/vue.esm.js’,’vue-router’] }, […]
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Time：2019-10-21
Explain Mongodb is a very famous NoSQL database. The following is the installation of mongodb under Ubuntu 14.04, as well as the configuration for PHP (driver installation, etc.), which is applicable to homestead. Install mongodb 1. add source sudo apt-key adv –keyserver hkp://keyserver.ubuntu.com:80 –recv 7F0CEB10 echo ‘deb http://downloads-distro.mongodb.org/repo/ubuntu-upstart dist 10gen’ | sudo tee /etc/apt/sources.list.d/mongodb.list sudo […]
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Time：2019-10-12
Differences between @ Autowired and @ resource annotations in spring framework In the spring framework, in addition to its unique annotations, JSR-250-based annotations are used, which include @PostConstruct, @PreDestroy and @Resource annotations. First, let’s briefly understand the @ postconstruct and @ predestroy annotations: To define the installation and uninstallation of a bean, we can use […]
