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Hibernate JPA Sequence (non-Id)
...
I fixed the generation of UUID (or sequences) with Hibernate using @PrePersist annotation:
@PrePersist
public void initializeUUID() {
if (uuid == null) {
uuid = UUID.randomUUID().toString();
}
}
...
Hash function that produces short hashes?
...thon again like the accepted answer):
import base64
import hashlib
import uuid
unique_id = uuid.uuid4()
# unique_id = UUID('8da617a7-0bd6-4cce-ae49-5d31f2a5a35f')
hash = hashlib.sha1(str(unique_id).encode("UTF-8"))
# hash.hexdigest() = '882efb0f24a03938e5898aa6b69df2038a2c3f0e'
result = base64.b...
How to check task status in Celery?
...t like this:
import celery
from celery_app import add
from celery import uuid
task_id = uuid()
result = add.apply_async((2, 2), task_id=task_id)
Now you know exactly what the task_id is and can now use it to get the AsyncResult:
# grab the AsyncResult
result = celery.result.AsyncResult(task_i...
PHP: How to generate a random, unique, alphanumeric string for use in a secret link?
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You can use UUID(Universally Unique Identifier), it can be used for any purpose, from user authentication string to payment transaction id.
A UUID is a 16-octet (128-bit) number. In its canonical form, a UUID is represented by 32 hexade...
Distributed sequence number generation?
...e unique IDs on the clients themselves, using an approach derived from how UUIDs and Snowflake's IDs are made. There are multiple options, but something along the lines of:
The most significant 40 or so bits: A timestamp; the generation time of the ID. (We're using the most significant bits for th...
Generating random strings with T-SQL
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Do not use RIGHT/SUBSTRING to truncate an UUID since it will be neither unique nor random due to the way UUIDs are generated!
– ooxi
Apr 11 '14 at 7:42
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LR性能测试结果样例分析 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...法找到。
500 100 内部服务器错误：ASP 错误。
501 标题值指定的配置没有执行。
502 Web 服务器作为网关或代理服务器时收到无效的响应。
并发数分析
“Running Vusers（运行的并发数）”显示了在场景执行过程中并发数...
How to generate a new Guid in stored procedure?
...
In MySQL it is UUID().
so the query would be:
insert into cars
(id, Make, Model)
values(UUID(), "Ford", "Mustang")
if you want to reuse the uuid you can do it like this:
set @id=UUID();
insert into cars
(id, Make, Model)
values(@id, "Fo...
背包：将代码块复制并粘贴到不同的屏幕和项目 · App Inventor 2 中文网
...组件时也会发生这种情况。 通过添加缺少的组件并为其指定与粘贴块中引用的名称相同的名称，可以删除（修复）错误。
可以从背包中移除代码块吗？
要从背包中移除所有块，请右键单击背包，然后选择“清空背包”。 要...
新闻传播中如何让沉默的数据说话 - 资讯 - 清泛网 - 专注C/C++及内核技术
...时代的预测新闻。众所周知，某一地区的人群利用互联网搜索引擎对于特定关键词的检索密集程度，可以预示着某种事件的发生或变动趋势。
两个显著的例子，一个是谷歌研究人员对于某一地区流行性感冒发生前的预警研究；...