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• vi/vim cheat sheet
• MSDN 我告诉你
• 一个故事告诉你比特币的原理及运作机制
• 深度调查 | 为什么我们不能访问谷歌？
• Dism++
• Internet Archive: Wayback Machine
• ShadowsocksR一键安装脚本
• Wallpaper Abyss - 高清壁纸, 桌面背景
• DuckDuckGo
• Windows 下如何配置 Aria 2
• 那些大荒中逐渐远去的大神
• 小游戏
• crontab.guru - The quick and simple editor for cron schedule expressions
• Chrome & Firefox now force .dev domains to HTTPS via preloaded HSTS
• Mac 使用 tar 压缩生成 “._“ 文件的解决办法
• How to deal with unzip error on a large file in OSX?
• How to use CKEditor in a Bootstrap Modal? - Stack Overflow
• Rufus - Create bootable USB drives the easy way
• sudo echo “something” >> /etc/privilegedFile doesn’t work… is there an alternative? - Stack Overflow
• PHP
  • Uploaded files are not deleted because of missing impersonation
• iOS
  • The 12 Steps of Bluetooth (Swift)
  • Draw smooth curves through a set of points in iOS
  • SceneKit - Draw 3D Parabola - Stack Overflow
  • SceneKit - From Zero to Hero
  • Making a glow node in SceneKit - Stack Overflow
  • Get the up vector of the camera in ARKit - Stack Overflow
  • Center align Labels and images inside UIView programatically with Swift - Stack Overflow
  • Best way to dismiss Keyboard in a View Controller iOS (Swift)
  • Swift Draw text on image programmatically and use it as Google Maps Marker
  • OpenCV with Swift - step by step
• Android
  • How to show a Toast for a specific duration in Android
  • A Beginner’s Guide to Installing OpenCV Android in Android Studio
  • How to check if Location Services are enabled?
  • The application may be doing too much work on its main thread
• Python
  • Simple Point Optical Tracker – A computer vision project to detect a laser pointer and control a small robot to follow it.
• 三维空间
• 面、点 法向量 的计算
• 四元数与欧拉角（RPY角）的相互转换
• 三维空间中的旋转：旋转矩阵、欧拉角
• 平面等距变换、三维空间的旋转和四元数
• 计算空间点到平面的投影点坐标
• Area of Triangles and Polygons
• Fitting a plane to many points in 3D