> - The `comments.sh` is compatible for both Linux and Mac platfrom.
> - The `comments.sh` needs [xidel](http://videlibri.sourceforge.net/xidel.html) to grab & parse the html contents with filtering out the HTML tags. The script would check the `xidel` whether installed or not in your Linux box, if not, it will download the [Universal Linux Version](http://videlibri.sourceforge.net/xidel.html#downloads) on Linux platform, and the [Mac OS Prebuilt Version](https://www.evernote.com/shard/s69/sh/ff1e78f3-a369-4855-b18f-6184ce789c45/f3511927d0fb356ce883835f2eb712e0) on Mac platfrom.
> - The `comments.sh` currently can automatically detect the problem's type, if the problem is `algorithm` type, it's going to create `.cpp` file, if the problem is `shell` type, the `.sh` file will be created.