骨干网
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联通回应断网：骨干网设备故障 已恢复正常？
3月20日下午，中国联通向微博发消开发者_StackOverflow中文版息称，11时25分，中国联通互联网骨干网一设备发生故障，影响了中国联通部分宽带用户的上网服务。经过紧急处理，11点45分各项业务恢复正常。[详细]
2023-01-04 21:21 分类：问答Fastest way to check if an object exists in Core Data or not?
I want to see if an object is persisted in Core Data or not. For example, I have Friends in Core Data, and I identify them by firstName. I can query core data to see if \"George\" is known. If the re开[详细]
2022-12-19 19:58 分类：问答
![Interactive visualization of a graph in python [closed]](https://www.devze.com/res/2023/04-10/09/92d32fe8c0d22fb96bd6f6e8b7d1f457.gif)
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