Interview Blitz 83: What would cause a @Transactional transaction to fail?

It is impossible to have no transactions in a program. In Spring, transactions are implemented in two ways: programmatic transactions and declarative transactions. Because programmatic transactions are relatively cumbersome to implement and declarative transactions are extremely simple to implement, we use declarative transactions@Transactional ...

Posted by Dragoon1 on Wed, 14 Sep 2022 21:10:37 +0300

Web-based meal ordering system for epidemic isolation zones

1. Project introduction The purpose of this project is to use the trend of Internet development and related web application development technology to improve the vitality and vitality of the catering industry, while contributing their own ideas and technologies to the epidemic. As we all know, when the new crown epidemic spread by foam lea ...

Posted by witold on Wed, 14 Sep 2022 21:01:42 +0300

Es6 arrow functions

1. Ordinary functions 1. First, let's talk about the use of ordinary function s 1.1 When we want to define a function, there are two ways to define a function (function function name () {}) (var function name = function () {}). For example, the following code defines fn1, fn2 var a=10; function fn1(){ co ...

Posted by kevin1 on Tue, 13 Sep 2022 21:23:09 +0300

Pair programming -- code analysis of teammates' personal projects

Project requirements For users: Primary school, junior high school and senior high school teachers. Functions: 1. The command line inputs the user name and password, separated by a space (the program presets three accounts for primary school, junior high school and senior high school respectively, see the attached table for details). If the use ...

Posted by scrtagt69 on Tue, 13 Sep 2022 21:22:01 +0300

TS decorators, Mixins, modules and namespaces

Table of contents decorator Definition of a decorator class decorator Mixins Modules and Namespaces Modules in TS Namespaces in TS decorator The main role of a decorator is to extend some new behavior to an existing method or class, rather than modifying it directly. After ES2015 enters Class, when we need to share or extend some met ...

Posted by axiom82 on Tue, 13 Sep 2022 21:04:14 +0300

Advanced front-end two-sided interview questions

If a constructor bind s an object, will the instance created by this constructor inherit the properties of the object? Why? No inheritance, because according to the four rules of this binding, the priority of the new binding is higher than the bind display binding. When a Constructor call is made through new, a new object is created, which repl ...

Posted by Shaudh on Mon, 12 Sep 2022 21:19:06 +0300

Java - what is thread

​ ​ Event address: CSDN 21 Day Learning Challenge 1. What is a thread To understand what a thread is, you must first understand a process Process: A simple understanding is the running program Thread: A thread is the smallest unit in a process, and there is at least one thread in a process There is no concept of a process in the ...

Posted by rajmohan on Mon, 12 Sep 2022 21:15:45 +0300

Network management related commands

1. Command netstat to display information such as local network connection, running port and routing table netstat command: used to display various network related information, such as network connection, routing table, interface status, dead link, multicast membership, etc. options -a : list all network connections in the system -t : List ...

Posted by Spitfire on Mon, 12 Sep 2022 21:01:50 +0300

word memory system

Topic B4: Keyword-based text sorting and retrieval system 1. Subject content and requirements Topic B4: (1) Subject content "Memorizing words - personalized memorizing words" is a software for reciting English words. Users can import the thesaurus to be recited according to their own needs, and can edit their own thesaurus. There a ...

Posted by john-formby on Sun, 11 Sep 2022 21:29:45 +0300

Basic data types for the golang learning notes series

Basic data types In the go language, data types are used to declare functions and variables. Data types appear to divide data into data of different memory sizes. When programming, large data is needed to apply for large memory. When small data is needed, small memory is needed to make full use of space. The go language has the following dat ...

Posted by ezekiel on Sun, 11 Sep 2022 21:28:26 +0300