Previous writing is too messy, turn it out and reorganize it
Small Catalog Series:
(1) Getting started with MySQL is not a big problem
(1) introducing constraints
(1) Where do constraints occur?
To explain constraints, you need to know where and why constraints are used.
The SQL language completes the definitio ...
Posted by gacon on Tue, 16 Jun 2020 18:12:15 -0700
Getting started with CSS
1, CSS introduction
1. What is CSS
CSS: Cascading Style Sheet
Is a set of style setting rules used to control the appearance style of the page
2. Why use CSS
Separate content and style for team development
Style reuse, convenient for later maintenance of website
Posted by felipe_lopes on Mon, 15 Jun 2020 22:16:27 -0700
Author: little potato biubiubiu
Blog Park: https://www.cnblogs.com/HouJiao/
The official account of WeChat: the idea of a broken potato (scanning the code, attracting a cat, listening to stories together, learning front-end technology)
The content of the author's article comes from his ...
Posted by ultimachris on Mon, 15 Jun 2020 20:45:51 -0700
Rice: I saw the source code of BeanDefinition, BeanFactoryPostProcessor and BeanPostProcessor these two days. Do you want to know
Melon: six six six, big man
Rice: last time we said that spring IOC container is a typical factory model
If we compare Spring to a large factory producing models, then. class files are raw materials. Bean definit ...
Posted by border20 on Mon, 15 Jun 2020 20:44:44 -0700
postMessage & Scheduler
Write in front
This article contains a certain amount of source code explanation, in which the author writes some contents to replace the official notes (that is, writing is almost equal to not writing that kind). If readers prefer the original code,
Moveable step Official warehouse , read in combination. For this ...
Posted by literom on Mon, 15 Jun 2020 19:21:15 -0700
2.2.2 Automatic Configuration
The ability to automatically configure for us when we add jar package dependencies allows us to run written projects without configuring or with a small number of configurations.
Question: How on earth does Spring Boot automatically configure its components?
The entry where the Sprin ...
Posted by carsale on Mon, 15 Jun 2020 10:37:14 -0700
Database integrity: prevent non semantic and incorrect data from entering the database;
Database security: prevent illegal users from intruding into the database and illegally accessing the database data.
5.1 entity integrity PRIMARY KEY
Entity integrity definition: single attribute - column level, tabl ...
Posted by pillarofautumn on Mon, 15 Jun 2020 01:01:57 -0700
The label used to loop the container forEach, see the example
The properties of foreach element mainly include item, index, collection, open, separator, close.
item: the alias of the element iteration in the collection,
Index: the index when the elements in the collection iterate
open: in the ...
Posted by mebar3 on Mon, 15 Jun 2020 00:25:08 -0700
1. Check the continuous repetition of words in a word document. In the word document, there are often repeated words in the document due to careless keyboard operation, such as "user's information" or "user input required". Use the extension library Python docx to check the word docu ...
Posted by kazuki on Sat, 13 Jun 2020 22:26:46 -0700
Qt3D is initiated by Nokia, and then improved by Digia and KDAB (the new version seems to be basically made by KDAB). It is a 3D image display and processing module based on OpenGL. Unfortunately, the data of Qt3D is relatively small, and with the version change, many online old Demo can' ...
Posted by Mattyspatty on Sat, 13 Jun 2020 18:10:30 -0700