Trying

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解决Electron vue-cli3.0+首次启动巨慢无法加载 vue-devtool 插件

现象首次启动可能会等待很久，出现以下信息： INFO Launching Electron... Failed to fetch extension, trying 4 more times Failed to fetch extension, trying 3 more times Failed to fetch extension, trying 2 more times 解决方案：找到background.js，将下面代码注释： // impor

关于MYSQL 死锁的问题 Deadlock found when trying to get lock； try restarting

定时执行的MYSQL 存储过程报错： Deadlock found when trying to get lock; try restarting transaction 这个错误是在MYSQL 的错误日志中看到的，不知道要从哪里开始入手解决这个问题。暂时没发现这个错误对业务逻辑有什么影响，求高手指点。贴出过程代码如下： DELIMITE

[HPM] Error occurred while trying to proxy request 终端报错

后台报错信息： [HPM] Error occurred while trying to proxy request /aws/compreElement?type=prec&element=sumprec&prectime=1h&time=20211126080000&procode=0&source=1&chinaSour=0 from localhost:8080 to http://12.12.1.19:8114/ (ECONNREFUSED) (h

Laravel 避免 Trying to get property of non-object 错误

阅读目录场景1. 常规方法是使用 isset 加以判断2. PHP7 可以使用 ?? (NULL 合并操作符)3. Laravel 5.5 及以上可以使用 optional 辅助函数4. 使用 object_get 辅助函数5. 使用 data_get 辅助函数场景 public function res() { $user = User::where('id',1)->first

A value is trying to be set on a copy of a slice from a DataFrame

A value is trying to be set on a copy of a slice from a DataFrame df_delta_fred.delta_thk[df_delta_fred.delta_thk < 0] = 0 解决报错： df_delta_fred.loc[(df_delta_fred.delta_thk < 0), 'delta_thk'] = 0

解决A value is trying to be set on a copy of a slice from a DataFrame警告

这个错误的原因是你修改了DataFrame的值只是一个副表，并没有对原数据进行改动。 https://pandas.pydata.org/pandas-docs/stable/user_guide/indexing.html#returning-a-view-versus-a-copy 通过官方的手册，你可以知道这个错误的真确写法正确的做法是找出该数据的行列组成（索引

个人对测试的理解--安全测试

系列文章目录整理下个人对测试的一些想法和理解，个人之见。文章目录系列文章目录整体思路安全测试权限审查账号管理外部攻击渗透攻击工具NMAPnessusmetasploitOWASP ZAP 漏洞网站简单的应对防火墙账号权限应用注入风险整体思路个人粗略地划分系统、应用应用对

suggest

suggest+名词、动名词短语、句子 suggest后面跟的是建议的事情，具有名词的特性。比如： I suggest this method. I suggest trying once again. I suggest we have dinner now. we have dinner 这个行为说白了还是一件事情。

Machine Learning(1)

Supervised Learning In supervised learning, we are given a data set and already know what our correct output should look like, having the idea that there is a relationship between the input and the output. Supervised learning problems are categorized into

NOTIC: [8] Trying to get property of non-object

NOTIC: [8] Trying to get property of non-object /home/wwwroot/qwsd/Application/Admin/Controller/ProjectController.class.php 第 29 行.一般错误是查询没有查询到值也没有返回值，很多情况是sql的问题，可以直接打印错误排查问题。$result = $db->query($query) or die($db

数据库死锁的问题，Deadlock found when trying to get lock; try restarting transaction at Query.formatError

场景：应用刚上线排除大批量请求的问题线上多次出现的Deadlock found when trying to get lock错误代码： async batchUpdate(skus, { transaction }) { const result = await Promise.all(skus.map(async sku => { const record = await this.app.model.Sku.upsert