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How can I use UUIDs in SQLAlchemy?
Is there a way to define a column (primary key) as a UUID in SQLAlchemy if using PostgreSQL (Postgres)?
9 Answers
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Is there any difference between a GUID and a UUID?
...und, and I was wondering if there are any differences between a GUID and a UUID?
6 Answers
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Create a GUID in Java
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Have a look at the UUID class bundled with Java 5 and later.
For example:
If you want a random UUID you can use the randomUUID method.
If you want a UUID initialized to a specific value you can use the UUID constructor or the fromString met...
Which UUID version to use?
Which version of the UUID should you use? I saw a lot of threads explaining what each version entails, but I am having trouble figuring out what's best for what applications.
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Generating v5 UUID. What is name and namespace?
... and namespace can be used to create a hierarchy of (very probably) unique UUIDs.
Roughly speaking, a type 3 or type 5 UUID is generated by hashing together a namespace identifier with a name. Type 3 UUIDs use MD5 and type 5 UUIDs use SHA1. Only 128-bits are available and 5 bits are used to specify...
BLE 蓝牙模块添加延时控制开关 - App Inventor 2 中文网 - 清泛IT社区，为创新赋能！
BLE 蓝牙模块如何添加延时控制开关，例如，在APP上点击一下，控制延时 10分钟、20分钟、1小时等多个选着时间控制程序开关灯，请指点，谢谢使用计时器组件，设置计时间隔，事件中给硬件发指令
APP INVENTOR硬件交互学习教程09——增加人机交互提示 - 创客硬件开发 - 清...
这一节，实现增加人机交互提示；蓝牙未开启情况下，打开APP会有提示弹窗，应用程序正在开启蓝牙，是否允许
蓝牙未连接情况下，发送命令给下位机提示弹窗，请先连接蓝牙
1.界面设计
增加activity 活动控件和对话框控件...
AppInventor 蓝牙界面很卡？ - 创客硬件开发 - 清泛IT社区，为创新赋能！
蓝牙数据发送太快，界面会卡：
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展之StringsReceived - 创客硬件...
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展之StringsReceived用法：
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展之：RequestMTU是否有上限？ -...
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待调查研究这个函数是否有上限。见这篇帖子《ble蓝牙 RequestMTU 请求没有反应？设置没有生效？》