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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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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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Can I use a function for a default value in MySql?
...app_users
BEFORE INSERT ON app_users
FOR EACH ROW
SET new.api_key = uuid();
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App Inventor 2 低功耗蓝牙(BLE) 硬件接入、数据通信及IO控制 · App Inventor 2 中文网
...牙App
蓝牙App开发示例
蓝牙App控制硬件
UUID分为标准UUID和厂商自定义UUID
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低功耗蓝牙(BLE)以低功耗、低成本、开发简便逐渐被广泛应用，本文主要介绍一款较...
How to test valid UUID/GUID?
How to check if variable contains valid UUID/GUID identifier?
12 Answers
12
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Google Tag Manager 入门指南 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...referrer，url三个宏，宏可以应用在rule和tag里，rule里作为筛选条件，tag里会被替换成当前值。
Google Analytics统计代码的添加与发布：
1.添加Container的加载脚本到自己站点的全局页脚
2.添加一个Custom Html Tag，把默认的Google Analytics...
Searching for UUIDs in text with regex
I'm searching for UUIDs in blocks of text using a regex. Currently I'm relying on the assumption that all UUIDs will follow a patttern of 8-4-4-4-12 hexadecimal digits.
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BLE UUID是对的但连接闪退：java.lang.IllegalArgumentException: UUID str...
请问UUID是对的 连接闪退，
下面是报错日志
java.lang.ExceptionInInitializerError
at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.subscribe(BluetoothLEint.java:357)
at edu.mit.appinventor.ble.BluetoothLEint$BLEReadOperation.run(BluetoothLEint.java:325)
at android.os....
Generate GUID in MySQL for existing Data?
...RE UPDATE on YourTable
FOR EACH ROW
BEGIN
SET new.guid_column := (SELECT UUID());
END
//
Then execute
UPDATE YourTable set guid_column = (SELECT UUID());
And DROP TRIGGER beforeYourTableUpdate;
UPDATE
Another solution that doesn't use triggers, but requires primary key or unique index :
UP...