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How do you disable viewport zooming on Mobile Safari?
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734
Your code is displaying attribute double quotes as fancy double quotes. If the fancy quotes are ...
Selecting multiple columns in a pandas dataframe
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Hugolmn
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answered Jul 2 '12 at 2:43
elyely
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Is the size of C “int” 2 bytes or 4 bytes?
Does an Integer variable in C occupy 2 bytes or 4 bytes? What are the factors that it depends on?
13 Answers
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Get a pixel from HTML Canvas?
...pixel and invert the color.
for (var i = 0, n = pix.length; i < n; i += 4) {
pix[i ] = 255 - pix[i ]; // red
pix[i+1] = 255 - pix[i+1]; // green
pix[i+2] = 255 - pix[i+2]; // blue
// i+3 is alpha (the fourth element)
}
// Draw the ImageData at the given (x,y) coordinates.
conte...
Position of least significant bit that is set
...ast significant bit that is set in an integer, e.g. for 0x0FF0 it would be 4.
22 Answers
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How can I run PowerShell with the .NET 4 runtime?
... the framework that PowerShell runs with), but now needs to work with .NET 4 assemblies as well as .NET 2 assemblies.
11 An...
Numpy first occurrence of value greater than existing value
...t save another list.
In [2]: N = 10000
In [3]: aa = np.arange(-N,N)
In [4]: timeit np.argmax(aa>N/2)
100000 loops, best of 3: 52.3 us per loop
In [5]: timeit np.where(aa>N/2)[0][0]
10000 loops, best of 3: 141 us per loop
In [6]: timeit np.nonzero(aa>N/2)[0][0]
10000 loops, best of 3: 1...
Random string generation with upper case letters and digits
...hically more secure version; see https://stackoverflow.com/a/23728630/2213647:
''.join(random.SystemRandom().choice(string.ascii_uppercase + string.digits) for _ in range(N))
In details, with a clean function for further reuse:
>>> import string
>>> import random
>>> d...
How do I convert between big-endian and little-endian values in C++?
...2 bit numbers:
unsigned long _byteswap_ulong(unsigned long value);
For 64 bit numbers:
unsigned __int64 _byteswap_uint64(unsigned __int64 value);
8 bit numbers (chars) don't need to be converted.
Also these are only defined for unsigned values they work for signed integers as well.
For float...