Tag:Outer layer

  • Analysis of using temporary table image with the same name in nested stored procedure of SQL Server

    Time:2021-2-22

         Can there be local temporary tables with the same name in nested stored procedures, outer stored procedures and inner stored procedures of SQL Server? If so, are there any problems or restrictions? In a nested stored procedure, do you call the outer stored procedure’s temporary table or the self-defined temporary table? Is the […]

  • JS array bubble sort

    Time:2021-2-20

    Bubble sort: Roulette, pairwise comparison, small front characteristic: 1. Number of rounds: length – 1 times in total 2. Number of comparisons in each round: as the number of rounds increases, the number of comparisons decreases code: Double loop represents the whole sorting process 1. Outer loop: control the number of rounds of comparison, from […]

  • Detailed explanation of MySQL connection query

    Time:2021-2-15

    1 function In MySQLjoinOperation is called join, which can connect data of multiple tables (through join condition), get data from multiple tables, merge them together and return them to client as result set. For example: Table a: id name age 1 A 18 2 B 19 3 C 20 Table B: id uid gender 1 […]

  • Capture bubble? Is browser a fish?

    Time:2021-1-15

    As a front-end coder, in the development of any function that needs to interact with users or be triggered by users, it is always inseparable from event processing. Today, let’s talk about the DOM event delivery mechanism of browsers. DOM events When the JavaScript engine of the browser parses HTML and SVG, it will analyze […]

  • It is forbidden to scroll the scroll event of the component and to disable scrolling

    Time:2020-12-17

    Problems encountered:The rebound (bottoming) of listview on the outermost layer of the home page conflicts with the rebound (bottoming) of the GridView component of the commodity classification inside, which leads to drop-down refresh and pull-up loading bugs solve the problem:Configure the physics property to: neverscrollablescrollphysics () class Nav extends StatelessWidget { @override Widget build(BuildContext context) […]

  • Nesting of JavaScript double loops

    Time:2020-12-5

    Nested reverse war class series of JavaScript double loop loop nesting The nesting of loops is that a loop contains another complete loop structure. As shown in the figure:   Its execution order is from outside to inside, the outer loop will execute once, and the inner loop will execute once completely. After the cycle […]

  • Flutter click the blank space to cancel the textfield focus and collapse the keyboard

    Time:2020-12-4

    Original text:Note – click in the blank space of flutter to cancel textfield focus GestureDetector( behavior: HitTestBehavior.translucent, onTap: () { //Touch to fold up the keyboard FocusScope.of(context).requestFocus(FocusNode()); }, child: …. } Put the code above on the outermost layer, and your own layout will be placed in the child. It will be effective in Pro […]

  • 06. About solving the problem of iframe tag nesting

    Time:2020-11-29

    Problem description When we use easyUI as the background management system, we will use the tree component to realize the tree menu, and every time we click the corresponding menu, we will judge whether it is a first-class menu and whether it already exists according to whether there is a URL //Judge whether the node […]

  • Learning notes of react advanced guidance

    Time:2020-11-21

    Accessibility For the barrier free part, there is no in-depth research and analysis. Personal cognition is all the function buttons, and the operation needs to fit all users as much as possible. For some users who have some deficiencies, they can also have enough friendly browsing experience. For example, all mouse operations can have keyboard […]

  • Golang deals with JSON structures

    Time:2020-11-17

    First, let’s take a look at the JSON string { “resp”: { “respCode”: “000000”, “Respmsg”: success, “app”: { “appId”: “xxxxxx” } } } Go has built-in JSON string parsing package “encoding / JSON” Next, we need to define the structure. According to the analysis of the JSON library, eachCurly bracketsIt’s a structure The disassembled structure […]

  • Flying from scratch: Provider

    Time:2020-11-2

    Previous review Flying from scratch: stateless widget Flying from scratch: stateful widget Flying from scratch: inherited widget In the last article, we introduced the inherited widget and raised a problem at the end. Although inheritedwidwidget can provide shared data and release the call of didchangedependencies by getelementforinheritedwidgetexacttype, the rebuilding of countwidget is not avoided and […]

  • Failed to configure a datasource for springboot startup

    Time:2020-10-16

    Error starting ApplicationContext. To display the conditions report re-run your application with ‘debug’ enabled.10:30:02.744 logback [main] ERROR o.s.b.d.LoggingFailureAnalysisReporter – APPLICATION FAILED TO START Description:Failed to configure a DataSource: ‘url’ attribute is not specified and no embedded datasource could be configured.Reason: Failed to determine a suitable driver class Action:Consider the following: If you want an embedded […]