1, Scope(1) What is the scope Before understanding the scope, first look at the variables and functions. Variables and functions have certain access rights, that is, they must meet the conditions or be within a certain range, which is the scope.
Its concrete manifestation is a specific code, in which the variables and functions are closed and ...
Posted on Sun, 09 Feb 2020 22:16:47 -0800 by morris520
json data structure: take the city data of package ticket website as an example, don't panic to get the data,
1. Analyze the data structure first. There are several large fields ('returnCode' and 'returnValue' fields. Only one field is defined and the other field is reserved (no need to deal with)
2 key table - > split 're ...
Posted on Sun, 09 Feb 2020 09:05:50 -0800 by netzverwalter
Back to home
This is just a simple understanding, because now the mainstream development mode can hardly use the Servlet, or it only comes with the framework, so it's packaged.
Servlet s can jump to each other, so that multiple servlets can be used for modularization.
Servlet jump is used in MVC (model ...
Posted on Sun, 09 Feb 2020 07:20:20 -0800 by pets2soul
During the development of spring annotation version, we usually establish a Configuration class of our own. The so-called Configuration class is to add @ Configuration annotation on the class. If the default filter rule is used, mark @ Controller,@Service,@Repository,@Component on the class,
The Spring ...
Posted on Sun, 09 Feb 2020 02:31:33 -0800 by redmonkey
This article introduces various usages of UIDynamtics. From the basic UIGravityBehavior and UICollisionBehavior, these simple animation behaviors bring excellent visual experience. Later, it will introduce UISnapBehavior, UIPushBehavior and cool UIAttachmentBehavior to see how to use simple c ...
Posted on Fri, 07 Feb 2020 23:46:38 -0800 by The Silent
css is not only the makeup artist of the page, but also the foundation that every front-end must master. In the work, it is often too frequent for business, so it can't be very good to precipitate the technology. This paper is mainly the notes that the author learned from his spare time. It ma ...
Posted on Fri, 07 Feb 2020 01:24:07 -0800 by nawhaley2265
In normal development, when the user modifies the data, there is no good way to record the specific modified information. We can only temporarily use the method of serializing the class into a json string and then inserting it into the log. At this time, if we want to know which field values the user has changed, it is very difficult ...
Posted on Thu, 06 Feb 2020 23:54:52 -0800 by jprazen
DOM node type
Element 1 node.element node
attr 2 node.attribute node
Text 3 node. Text > node text node (the blank area between labels also belongs to the text node)
Comment 8 node.comment node
Document 9 node.document [node] document node (on all documents, i.e. the front most position in a page, in front of the document definition)
Posted on Thu, 06 Feb 2020 02:42:28 -0800 by damo87
In order to save code and focus on technology itself, we directly reuse main.qml from the previous blog to demonstrate
import QtQuick 2.13
import QtQuick.Window 2.13
title: "Qt Qui ...
Posted on Wed, 05 Feb 2020 05:32:37 -0800 by future448
Multi table design
In the development process, the requirement analysis is carried out in the early stage. The requirement analysis provides E-R diagram, and the table structure is compiled according to the ER diagram.
There are three relationships between tables: one to many, many to many, and o ...
Posted on Tue, 04 Feb 2020 03:33:57 -0800 by dannyz