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Simple proof that GUID is not unique [closed]
...If you generate a sequence of n GUIDs randomly, then the probability of at least one collision is approximately p(n) = 1 - exp(-n^2 / 2 * 2^128) (this is the birthday problem with the number of possible birthdays being 2^128).
n p(n)
2^30 1.69e-21
2^40 1.77e-15
2^50 1.86e-10
2^60 1.95e-03
...
What is the best project structure for a Python application? [closed]
...he single Python source file option above was a trick - you always need at least one other file for your unit tests). For example, Twisted/twisted/test/. Of course, make it a package with Twisted/twisted/test/__init__.py. Place tests in files like Twisted/twisted/test/test_internet.py.
add Twisted...
How to compare arrays in JavaScript?
... Your method should be called equals instead of compare. At least in .NET, compare usually returns a signed int indicating which object is greater than the other. See: Comparer.Compare.
– Oliver
May 31 '13 at 12:24
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What is the difference between quiet NaN and signaling NaN?
... of T unchanged.
For binary formats, the payload is encoded in the p−2 least significant bits of the trailing significand field
The Intel 64 and IA-32 Architectures Software Developer’s Manual - Volume 1 Basic Architecture - 253665-056US September 2015 4.8.3.4 "NaNs" confirms that x86 follo...
Finding local maxima/minima with Numpy in a 1D numpy array
...oisy, you can always try low-pass filtering first for smoothing. For me at least, most of my local max/min uses are for global max/min within some local area (e,g, the big peaks and valleys, not every variation in the data)
– marcman
Jun 23 '15 at 17:18
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Circular (or cyclic) imports in Python
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They are def. not supported in 3.0-3.4. Or at least the semantics for success are different. Here is a synopsis I found that dosn't mention the 3.5 changes. gist.github.com/datagrok/40bf84d5870c41a77dc6
– meawoppl
Apr 22 '16 at 19...
How do I find out which keystore was used to sign an app?
...rent reasons. Java 1.6 seems to be the most extended version so far, or at least widespread, and whilst the accepted solution works with both 1.6 and 1.7, this one will only work with 1.7, so I don't think this should be the accepted answer (yet!). (Also note that the accepted answer is form 2012, ...
Detect Windows version in .net
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This table is at least partially incorrect, which makes the answer (originally about Win7) incorrect. People are up-voting without checking to see if it actually works. Win7 does not have a minor of 2 on my machine. I am on Win7 SP1 and my ve...
Random number generator only generating one random number
...g to be a wee bit slower, but can be much more random than Random.Next, at least from my experience.
But not:
new Random(Guid.NewGuid().GetHashCode()).Next();
The unnecessary object creation is going to make it slower especially under a loop.
And never:
new Random().Next();
Not only it's slo...
c++11 Return value optimization or move? [duplicate]
...r falls back on move-semantics, but would rather use RVO when possible. At least, that's my understanding.
– Jamin Grey
Nov 14 '13 at 1:07
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