检测您的电脑是否连接到Internet，当你的程序需要访问Internet时可用此源码先检测-detect your computer is connected to the Internet. When you need access to the procedure when the Internet first source available to detect

NodeJS实现文件推送,自动检测文件夹文件变化,并推送.-NodeJS push files, automatically detect the file folder changes, and push.

vc qrs 检测算法，非常不错的程序,good good good-vc qrs detect,very good source code