持续更新数据算法
网站上的信息整齐地列出，并且每隔一段时间（不是按照固定的时间表）更新新信息。我想编写一个快速脚本，当有新内容更新时，它会自动让我知道，而不是让我知道每 x 数量的房子/分钟。
我最初的想法是，我会让脚本提取我正在查找的所有信息并将其存储在一个列表中，并在下次扫描时创建一个新列表并删除所有重复项，这将使我得到新信息。
如果您知道解决此类问题的有效方法并能引导我走向正确的方向，我将不胜感激。
我并不是真的在寻找源代码，只是在寻找如何去做，我确信在一些关于有效方法的指导后我可以将其组合在一起。
There is information on a website that is neatly listed and every so often (not on a set schedule) it updates with new information. I am wanting to write a quick script that will automatically let me know when something new has been updated instead of letting me know every x-amount of house/minutes.
My initial thought was that I would have the script pull all the information I was looking for and store it in a list and on the next scan create a new list and get rid of all duplicates which would leave me with what the new information is.
If you know of an effective way to go about such things and could lead me in the right direction, it would be appreciated.
I'm not really looking for source code, just how to go about it and I'm sure I can put it together after some guidance on an efficient way to do it.
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您可以轮询网站，但没有真正的方法可以注册更改侦听器。
如果您准备好进行轮询，那么 document.lastModified (js) 可以提供帮助。
当然，如果您的网站有 RSS 提要，那么您可以监听更改。
或者，如果您注册了一些免费服务，它们会向您发送电子邮件通知。事物（例如：http://www.followthatpage.com/）
You can poll the website, there is no real way you can register a change listener.
If you are ready to poll then document.lastModified (js) can help.
Of course if your website have rss feeds then you can listen for changes.
or there are some free services that will send you an email notification if you register for their services. things (eg: http://www.followthatpage.com/)