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Generating a UUID in Postgres for Insert statement?
My question is rather simple. I'm aware of the concept of a UUID and I want to generate one to refer to each 'item' from a 'store' in my DB with. Seems reasonable right?
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How unique is UUID?
How safe is it to use UUID to uniquely identify something (I'm using it for files uploaded to the server)? As I understand it, it is based off random numbers. However, it seems to me that given enough time, it would eventually repeat it self, just by pure chance. Is there a better system or a patter...
App Inventor 2 低功耗蓝牙 BlueToothLE 拓展之：RequestMTU是否有上限？ -...
RequestMTU
没反应,是不是因为这个值1024太大了
1024没触发,64触发了
MTU设64不报错,设100报错 128报错.256不报错.
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连上后，调用，没有触发回调？
待调查研究这个函数是否有上限。
泡在Stack Overflow答题30天 - 创意 - 清泛网 - 专注C/C++及内核技术
...是如何使用Stack Overflow的话，我的答案就是：打开网页，搜索问题，查看Stack Overflow的搜索结果，参...想法的萌芽
如果非要总结下我多年来是如何使用Stack Overflow的话，我的答案就是：打开网页，搜索问题，查看Stack Overflow的搜...
How good is Java's UUID.randomUUID?
I know that randomized UUIDs have a very, very, very low probability for collision in theory, but I am wondering, in practice, how good Java's randomUUID() is in terms of not having collision? Does anybody have any experience to share?
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I need to generate uuid for my rails application. What are the options(gems) I have? [duplicate]
...dditional dependencies and use SecureRandom which is builtin:
SecureRandom.uuid #=> "1ca71cd6-08c4-4855-9381-2f41aeffe59c"
See other possible formats here.
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How do I change the UUID of a virtual disk?
... displays an error saying the virtual hard disk cannot be used because the UUID already exists.
9 Answers
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Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
...即一个信号量最多可以被锁住n次，其中n是信号量产生时指定的，当某线程试图对该信号量进行第n+1次加锁，则该线程将会发生阻塞，直到前n次加锁中任意一次释放该信号量。信号量可以看作是容量为1的特殊的互斥量。另外，...
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...泛网 关于我们 免责申明 联系我们 手机版 IT搜索 下载栏目 图片栏目 网站地图 IT技术 C/C++ 开源 & Github 数据库(内核) 大数据 & AI 其他 IT专题 还在用Java开发安卓App？你out啦！ 轻松创APP ...
How to create a GUID/UUID using iOS
I want to be able to create a GUID/UUID on the iPhone and iPad.
8 Answers
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