directory validhome selected the

idea创建SpringBoot项目报错For artifact {mysql:mysql-connector-java:null:jar}: The version cannot be em

For artifact {mysql:mysql-connector-java:null:jar}: The version cannot be empty. 报错如图: pom.xml文件如图: 添加版本号: 就好了 ......

为什么 SELECT FOR UPDATE 只在事务中起作用

在MySQL中SELECT FOR UPDATE建议要在事务中运行,原因是当SELECT FOR UPDATE执行完之后,就释放锁了。其实查询出来的数据接下来还要更新,所以建议必须要在事务中运行,针对spring事务其实就是加注解@Transaction。 图二中显示一直转圈圈,说明上一个图中已经上 ......
作用 事务 SELECT UPDATE FOR

cublas runtime error : the GPU program failed to execute 报错

情景 在使用 pytorch 1.0 和 RTX 3060 Laptop 训练 GIN 的时候出现了这个错误 原因 pytorch 1.0 对应的 cuda 10.0 版本太低了,不支持新的 GPU 架构 解决 最终使用了更新版本的 pytorch ......
runtime program execute cublas failed

hdu:surrounding the trees(凸包)

Problem Description There are a lot of trees in an area. A peasant wants to buy a rope to surround all these trees. So at first he must know the minim ......
凸包 surrounding trees hdu the

[Typescript] ts-toolbelt F.Narrow preserve the exactly data for function arguement

Example code: interface Fruit { name: string; price: number; } export const wrapFruit = <TFruits extends Fruit[]>(fruits: TFruits) => { const getFruit ......

对外提供的api保证接口的幂等 (先select 再 update innodb是行级锁, mysam是表级的锁)

额外的状态字段,这个状态值一般只会单流程变更,不管通过什么消息传递,目前申万宏源的每一个业务大部分都走流程,走的过程就有唯一的业务字段配合 工作流workflow服务来进行业务流转 个人观点解决幂等只有两种方式第一种依赖上游带过来的唯一标志,然后我们给这个唯一标志加锁保证请求只有一个请求,别的都直接 ......
接口 select innodb update mysam

The 2022 ICPC Asia Nanjing Regional Contest

写了题解没写代码的:BDGHK A 题解 先求出没有洞的话,最终留下来的袋鼠是哪个矩形。再看洞相对袋鼠是怎么移动的,这个洞会留下来一个移动轨迹。check 一个点是不是答案,就是看这个移动轨迹和袋鼠矩形的交的大小。那么每次是对移动轨迹进行一个二维数点。移动轨迹坐标必须在 $[-n,n]$ 和 $[- ......
Regional Contest Nanjing 2022 ICPC

E325: ATTENTION Found a swap file by the name "/etc/ssh/.sshd_config.swp"

今天使用vim /etc/ssh/.sshd_config命令报下面这个错误 查询后发现是上次修改内容没有保存,意外退出造成的,生成了一个.swp文件。我按了一下回车就回到编辑页面了,没有保存上次的编辑。其他解决方法还原上次编辑结果,使用命令vim -r 文件名 命令恢复上次编辑结果,使用 rm - ......
quot sshd_config ATTENTION config Found

Luogu P2973 [USACO10HOL]Driving Out the Piggies G

发现答案其实与这个点炸弹经过的次数有关,因为只要知道了这个点炸弹经过次数 $w$,这个点答案就能算出:$w\times \frac{p}{q}$ 就想到设 $f_u$ 为 $u$ 点炸弹经过次数 $u$ 点经过次数便可以由有连边的 $v$ 点推来,要满足 $v$ 点此时炸弹没爆炸且 $deg_v$ ......
Driving Piggies Luogu P2973 USACO

IDEA报错:Unsupported characters for the charset 'ISO-8859-1'

IDEA报错:Unsupported characters for the charset 'ISO-8859-1' 解决方法 File->Settings->Editor->File Encodings 将Properties Files (*.properties)下的Default encod ......
Unsupported characters charset IDEA 39

echarts 5.x 如果legend设置selected时,legend需要单击两次才能切换状态

在第一组的selected里面先进行声明,在当前组再进行一次声明就可以了。 legend: [ { show: true, x: 'center', y: '0', data: ['日平均气温(℃)', '日平均室温(℃)'], textStyle: { fontSize: 14, }, serie ......
legend selected 状态 echarts

Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple ERROR: Could not find a version that satisfies the requirement mediapipe (from versions: none) ERROR: No matching distribution found f

命令行输入: pip install mediapipe 报错: Looking in indexes: https://pypi.tuna.tsinghua.edu.cn/simple ERROR: Could not find a version that satisfies the requi ......

Elasticsearch专题精讲——Installing Elasticsearch ——Install ECK using the Helm chart

Install ECK using the Helm chart Starting from ECK 1.3.0, a Helm chart is available to install ECK. It is available from the Elastic Helm repository a ......

keil中error: #5: cannot open source input file “xxxxx“: No such file or directory 解决办法

error: #5: cannot open source input file “xxx.h“: No such file or directory 一般是.h没有添加到项目中。将包含.h文件或文件夹添加进去即可 ......
file directory 办法 cannot source

The Org2Blog Project README.org

About {#about id="org_gcr_2019-03-06T17-15-24-06-00_cosmicality:B5FB31EA-EA25-4675-90B0-AE0167BAE092"} Blog from Org mode to WordPress. Table of Conte ......
Org2Blog Project README 2Blog Blog

The GitHub Project xm-rpc-el/xml-rpc-el README.org

Commentary: This is an XML-RPC client implementation in elisp, capable of both synchronous and asynchronous method calls (using the url package's asyn ......
xml-rpc-el xm-rpc-el rpc Project GitHub

Tool-CMake-How CMake simplifies the build process by Bruno Abinader

Tool-CMake-How CMake simplifies the build process by Bruno Abinader https://gitlab.kitware.com/cmake/community/-/wikis/home https://brunoabinader.gith ......

Cheems. Would you like going to the dock later to order some French fries?

Prologue " So, where are we going? " " I'm going to the dock later to order some French fries. " " No, you misunderstood... I mean, what is the ultima ......
Cheems French Would going fries

/usr/bin/env: ‘python’: No such file or directory

01、问题 02、解决方法 a、 root@DESKTOP-A31BQ38:/home/software/gatk-4.4.0.0# which python3 ## 确定已经安装python; 或者执行 which python, 输出python可调用路径 /usr/bin/python3 b、 ......
directory python file such usr

tar (child): bzip2: Cannot exec: No such file or directory

01、问题 02、ubuntu系统 root@DESKTOP-A31BQ38:/home/software# lsb_release -a 03、解决方法 root@DESKTOP-A31BQ38:/home/software# apt install bzip2 参考:https://blog.c ......
directory Cannot child bzip2 bzip

4、题目:Creativity in Electrical Engineering Degree Programs: Where Is the Content?

期刊信息 (1)作者:Adams,Scott (2)期刊:IEEE Transactions on Education, 2019/11, 62-4: 288-296 (3)DOI:10.1109/TE.2019.2912834 (4)ISSN:0018-9359 (5)IF:2.74 (Q2) 研 ......

2、题目:The Informed Design Teaching and Learning Matrix

期刊信息 (1)作者:Crismond, David P. (2)期刊:Journal of Engineering Education, 2012, 101(4): 738–797 (3)DOI:10.1002/j.2168-9830.2012.tb01127.x (4)ISSN:10694730 ......
Informed Teaching Learning 题目 Design

解决 ERROR:Docker Got permission denied while trying to connect to the Docker daemon socket at unix

解决 ERROR:Docker Got permission denied while trying to connect to the Docker daemon socket at unix 在终端执行"docker version"命令,出现如下报错: ”Got permission deni ......
Docker permission connect denied daemon

vue3自定义指令实现el-select下拉加载更多

1. 新建js文件 export default (app) => { app.directive('loadmore', { beforeMount(el, binding) { const element = el.querySelector('.t-select__dropdown'); el ......
指令 el-select 更多 select vue3

【解决】axios 下载文件 Failed to read the 'responseText' property from 'XMLHttpRequest'

主要解决以下两个问题 问题一:idm一些网站不允许请求同一文件两次 故障原因:IDM 在发神经 因为它检测到浏览器集成插件未安装,所以诱导你安装。实际上,装了插件问题也会出现。改参数都没用。 1.很可能是你点击网页的 下载链接 有问题(换个网页下载试试,就不提示了),Edge 浏览器一直会欺骗你, ......

Could not create the Java virtual machine解决

Could not create the Java virtual machine解决 原文链接:https://blog.csdn.net/weixin_42031680/article/details/118652127 Could not create the Java virtual mac ......
machine virtual create Could Java

The principle of uploading files with command line tools All In One

The principle of uploading files with command line tools All In One 命令行工具文件上传的原理 / The principle of command line tool file upload demos pip git CDN OS ......
principle uploading command files tools

Experience Lightning-Fast Wi-Fi Connectivity with the QCN9024: The Ultimate Solution for Dense Environments

The QCN9024 is the latest addition to the Qualcomm Networking Pro Series platform for Wi-Fi 6E access points. Designed to support high-performance, lo ......

8. SELECT

一. LIMIT和ORDER BY [root@mysql.sock][employees]> select * from employees limit 1; -- 从employees中随机取出一条数据,结果是不确定的 + + + + + + + | emp_no | birth_date | ......
SELECT

The 2021 CCPC Weihai Onsite

C 挺有意思的题,但要在场上切难度还是挺大的(和前十题不在一个档次) 转成原根后变成模意义下的01背包(原本考虑了一下转生成函数,但是得保留$np$位,显然不靠谱;而bitset优化暴力又过不去)。 发现做这个背包的过程是或运算,也就是说有用的操作只会把某些0变成1,那么自然地会想到:每次用$Pol ......
Onsite Weihai 2021 CCPC The