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Getting an element from a Set
... match this "copied" instance with the original one, I decided to use Java UUIDs.
So I created an abstract class UniqueItem, which automatically gives a random unique id to each instance of its subclasses.
This UUID is shared between the client and the server instance, so this way it could be easy...
MySQL 启动报错 Table \'mysql.plugin\' doesn\'t exist - 数据库(内核) -...
MySQL 启动报错 Table 'mysql.plugin' doesn't exist 启动报错： opt szy bin mysqld: Table 'mysql.plugin ' doesn 't exist141211 15:06:12 [ERROR] Can 't open t...启动报错：
/opt/szy/bin/mysqld: Table \'mysql.plugin\' doesn\'t exist
141211 15:06:12 [ERROR] Can\'t open the mysql.plug...
解决python3报错：TypeError: a bytes-like object is required, not \'str...
解决python3报错：TypeError: a bytes-like object is required, not 'str'问题原因：python3和Python2在套接字返回值解码上有区别，也就是说报错的这段代码在python2上可以正常使用。解决思路：python bytes和str两种类型可以通过函数encode()和decode() ...
【解决】php报错：Can not connect to MySQL server - 更多技术 - 清泛网 -...
【解决】php报错：Can not connect to MySQL server遇到这种情况，如果是mysql安装问题，可以通过命名测试一下：mysql -uroot -p如果用户名密码验证能够正常连接，但php报错的话，那大概率是因为你访问的库没有被创建，创建一下就OK了。...
【ClientSocketAI2Ext】拓展报错信息如何自定义展示？ - App Inventor 2 拓...
目前该拓展报错（比如IP或端口不通）后，直接App崩溃退出，如下：
如何自定义并友好地展示报错信息呢？
一般地，使用屏幕1.出现错误 这个事件：
但是经过测试，此方式无效，系统还是按照自己的错误提示显示，并...
语音识别 报错问题：No Activity found to handle intent { act=android.sp...
语音识别仿真报错，安装到手机端也报错https://www.fun123.cn/reference/info/#AppEntry
请参考一下这个教程，你上面报错的原因是手机上没有安装语音识别引擎，这里推荐“讯飞语音+”，下载地址：https://www.pgyer.com/yyyq
pypi UserWarning: Unknown distribution option: 'install_requires'
...ed Nov 28 '11 at 15:38
Fredrik HåårdFredrik Håård
2,4622020 silver badges3232 bronze badges
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Guid.NewGuid() vs. new Guid()
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An empty UUID is very useful indeed. It makes a great special value.
– Jon Hanna
Aug 13 '12 at 16:21
105
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Does every Core Data Relationship have to have an Inverse?
... alternative solution, as discussed in the comments, is to create your own UUID property on the target (in the example here, every Page would have an id that is a UUID), store that as a property (currentPage just stores a UUID as an Attribute in Book, rather than being a relationship), and then writ...
BLE（二）信道&数据包&协议栈格式 - 创客硬件开发 - 清泛IT社区，...
...们常说的“温度”、“湿度”等人类可识别的术语，通过UUID进行区分。Attribute Handle是一个16-bit的数值，用作唯一识别Attribute server上的所有Attribute。Attribute Handle的存在有如下意义：
一个server上可能存在多个相同type的Attribute，...