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Is a GUID unique 100% of the time?
...38) is so large that the probability of the same number being
generated twice is very small. For
example, consider the observable
universe, which contains about 5×1022
stars; every star could then have
6.8×1015 universally unique GUIDs.
From Wikipedia.
These are some good articles on how a GUID ...
App Inventor 2开发简单计算器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...；C：英文CLEAR的缩写，用于清除计算过程中的全部信息；CE：英文CLEAR ENTRY的缩写，用于清除在算符之后输入的所有数字——后数；←（回退）：用于从尾部清除后数中的一个字符；±（相反数）：用于求相反数，如果后数不为0...
How can I clone an SQL Server database on the same server in SQL Server 2008 Express?
...
87
1. Don't create an empty database and restore the .bak file on to it. 2. Use 'Restore Database' option accessible by right clicking the "Da...
How can I select an element by name with jQuery?
... I had to use it like $('td [name=tcol1]') - without the space between td and [] it returned me NULL.
– akki
Dec 17 '14 at 11:14
...
Explaining Python's '__enter__' and '__exit__'
...nother terminal / python interpreter
>>> s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
>>> s.listen(5)
>>> s.bind((socket.gethostname(), 999))
>>> while True:
>>> (clientsocket, addr) = s.accept()
>>> print('get connection from %r' ...
Objective-C parse hex string to integer
...
dreamlaxdreamlax
87.6k2828 gold badges154154 silver badges202202 bronze badges
...
How to abort an interactive rebase if --abort doesn't work?
...\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7...
How does Google Instant work?
...om/search?hl\x3den\x26expIds\x3d17259,24472,24923,25260,25901,25907,26095,26446,26530\x26sugexp\x3dldymls\x26xhr\x3dt\x26q\x3dStack%20Overflow\x26cp\x3d6\x26pf\x3dp\x26sclient\x3dpsy\x26aq\x3df\x26aqi\x3dg4g-o1\x26aql\x3d\x26oq\x3dStack+\x26gs_rfai\x3d\x26pbx\x3d1\x26fp\x3df97fdf10596ae095\x26tch\x3...
What's the difference between :: (double colon) and -> (arrow) in PHP?
...
ArtefactoArtefacto
87.4k1414 gold badges185185 silver badges211211 bronze badges
...
Regular expression for a string that does not start with a sequence
...\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7...