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robotic process automation web crawling scrapy Portia Beautiful Soup XPath browser automation framework Selenium Tag UI test automation framework appium ui automation framework ui.vision SikuliX Reference Robot Framework Selenium automates browsers Tag UI RPA VS Selenium appium scrapy Portia Beautiful Soup XPat...

Elastic Stack Filebeat + kafka + Logstash + Elasticsearch + Kibana curl ip.sb netstat -natp | grep 5601 filebeat install curl -L -O https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-7.15.2-x86_64.rpm sudo rpm -vi filebeat-7.15.2-x86_64.rpm elastic search install wget https://artifacts.elastic.co/downloads/elasticsearc...

Jupyer Error No module named ‘jupytext’ python3 -m pip install jupytext Jupyter Notebook : ERROR:asyncio:Exception in callback jupyter notebook --generate-config vim ~/.jupyter/jupyter_notebook_config.py # add c.NotebookApp.kernel_manager_class = 'notebook.services.kernels.kernelmanager.AsyncMappingKernelManager' Reference Jupyter No...

SSL error: dh key is too small # 允许使用短dh key sudo update-crypto-policies --set LEGACY Reference SSL error ‘dh key is too small’, when connecting to SQL Server using ODBC 17 and Laravel on Centos 8

Math 概率论 期望与方差 随机变量 离散型随机变量 连续型随机变量 ξ 的数学期望Eξ = a1p1 + a2p2 + … + anpn, 反应集中趋势, 和平均取值 ξ 的均方差Dξ = (a1-Eξ)^2p1 + (a2-Eξ)^2p2 + … + (an-Eξ)^2*pn, 标准差为Dξ开更号 方差和标准差, 反应期望的稳定, 集中与离散程度 伯努利分布/二项分布 泊松分布/二项分布 正态分布 条件概率 先验概率 全概率 后验概率 贝叶斯公式(逆概率公式) 极大似然估计算法 熵

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FLutter 配置 IPHONEOS_DEPLOYMENT_TARGET Set MinimumOSVersion to 9.0 in ios/Flutter/AppFrameworkInfo.plist Ensure that you uncomment platform :ios, ‘9.0’ in ios/Podfile Ensure that ios/Podfile contains the following post install script: post_install do |installer| installer.pods_project.targets.each do |target| flutter_ad...

Security AES Dart AES import 'package:encrypt/encrypt.dart'; final aesKey = Key.fromUtf8('wWKK335SKLDFJ146'); final iv = IV.fromLength(16); final encrypter = Encrypter(AES(aesKey, mode: AESMode.cbc, padding: 'PKCS7')); final encrypted = encrypter.encrypt(content, iv: iv); final decrypted = encrypter.decrypt(encrypted, iv: iv); print(d...