大约有 9,000 项符合查询结果（耗时：0.0125秒） [XML]
【解决】File does not reside within any path specified using proto_pat...
...信息，大概是.proto文件没找到导致的，但明明就是正确地指定了文件路径。
解决：
加 -I 或 --proto-path ，指定.proto文件的路径即可解决。
# ./protoc --cpp_out=. ../main/test/test.proto
改为
# ./protoc --cpp_out=. ../main/test/test.proto -I../main/te...
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?
...
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
...
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
...
高并发服务端分布式系统设计概要 - C/C++ - 清泛网 - 专注C/C++及内核技术
...由谁来管理这些groups呢？由Web过来的请求，又将如何到达指定的group，并由该group处理它的请求呢？这就是我们要讨论的问题。
我们引入了一个新的角色——Global Master，顾名思义，它是管理全局的一个节点，它主要完成如下工...
淘宝大秒系统设计详解 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...中。
按照某种维度建的索引产生热点数据，比如实时搜索中按照商品维度关联评价数据，有些热点商品的评价非常多，导致搜索系统按照商品ID建评价数据的索引时内存已经放不下，交易维度关联订单信息也同样有这些问题...
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...
How to handle many-to-many relationships in a RESTful API?
...going to make that easier.
Relationship IDs probably ought to be based on UUIDs or something equally long and random, irrespective of whatever type of IDs you use for teams and players. That will let you use the same UUID as the ID component for each end of the relationship without worrying about c...
Rails: How can I set default values in ActiveRecord?
...
You can also pass a lambda to the default parameter. Example:
attribute :uuid, :string, default: -> { SecureRandom.uuid }
The second argument is the type and it can also be a custom type class instance, for example:
attribute :uuid, UuidType.new, default: -> { SecureRandom.uuid }
...