大约有 1,300 项符合查询结果（耗时：0.0169秒） [XML]
Which UUID version to use?
...ly 0.00...many more 0s here...001% chance of collision, you should use UUIDv1. See Nick's post for UUIDv3 and v5.
UUIDv1 is NOT secure. It isn't meant to be. It is meant to be UNIQUE, not un-guessable. UUIDv1 uses the current timestamp, plus a machine identifier, plus some random-ish stuff to m...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...数据版本的设计。也就是说，如果你读出来数据的版本是v1，当你计算完成后要回填数据后，却发现数据的版本号已经被人更新成了v2，那么服务器就会拒绝你。版本这个事就像“乐观锁”一样。
但是，对于分布式和NWR模型来说...
awk without printing newline
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awk '{sum+=$3}; END {printf "%f",sum/NR}' ${file}_${f}_v1.xls >> to-plot-p.xls
print will insert a newline by default. You dont want that to happen, hence use printf instead.
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:active pseudo-class doesn't work in mobile safari
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I am getting page freezes on iOS 9.1 and 9.3 using this method ... those versions had a js bug, but still have 0.5% users on those OSes
– Ruskin
Mar 21 '17 at 12:38
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Create PostgreSQL ROLE (user) if it doesn't exist
..._user and pg_roles are both correct. Still the case in the current version 9.3 and it's not going to change any time soon.
– Erwin Brandstetter
Mar 27 '14 at 16:41
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重构理论及实践——用工厂模式重构c++后台代码 - C/C++ - 清泛网 - 专注C/C...
...重构的，架构的问题咱们在这儿就不展开聊了：）
代码V1版
遵循tsf4j的tapp写法，ServerCenterApp类是后台程序的主逻辑类，其中process_pkg是消息处理的主逻辑函数。会对不同的消息调用不同的消息processor函数。而每个消息processor...
PostgreSQL: How to make “case-insensitive” query
... in the SQL standard but is a PostgreSQL extension." Works like a charm in 9.3
– Aleksey Deryagin
Dec 23 '14 at 20:38
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How does functools partial do what it does?
..., fnx()) for c in range(10) ]
target = (2, 4)
import math
def euclid_dist(v1, v2):
x1, y1 = v1
x2, y2 = v2
return math.sqrt((x2 - x1)**2 + (y2 - y1)**2)
To sort this data by distance from the target, what you would like to do of course is this:
data.sort(key=euclid_dist)
but you ca...
How do you install Google frameworks (Play, Accounts, etc.) on a Genymotion virtual device? [duplica
...teps the same as before, just make sure you download the 4.4 GApps.
UPDATE-v1.1: I've gotten more up-to-date builds of libhoudini and have updated the ZIP file. This fixes a lot of app crashes and hangs. Just flash the new one, and it should work.
This guide is for getting back both ARM translation...
How to load assemblies in PowerShell?
...blog posts with numerous examples of ways to load assemblies in PowerShell v1, v2 and v3.
The ways include:
dynamically from a source file
dynamically from an assembly
using other code types, i.e. F#
v1.0 How To Load .NET Assemblies In A PowerShell Session
v2.0 Using CSharp (C#) code in PowerS...