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Disable cache for some images
...y other) field, you'll need several headers to get the desired effect on a range of browsers.
header ("Pragma-directive: no-cache");
header ("Cache-directive: no-cache");
header ("Cache-control: no-cache");
header ("Pragma: no-cache");
header ("Expires: 0");
...
matplotlib colorbar for scatter
... you?
import matplotlib.pyplot as plt
cm = plt.cm.get_cmap('RdYlBu')
xy = range(20)
z = xy
sc = plt.scatter(xy, xy, c=z, vmin=0, vmax=20, s=35, cmap=cm)
plt.colorbar(sc)
plt.show()
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Generate random numbers with a given (numerical) distribution
...yword parameter to numpy.random.choice(), e.g.
numpy.random.choice(numpy.arange(1, 7), p=[0.1, 0.05, 0.05, 0.2, 0.4, 0.2])
If you are using Python 3.6 or above, you can use random.choices() from the standard library – see the answer by Mark Dickinson.
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How to get the last element of a slice?
... I am not sure but I got panic: runtime error: index out of range for profiles[len(profiles)-1].UserId, I guess the length of the slice is 0 so it panics?
– tom10271
Aug 16 '19 at 2:20
...
Numpy: find first index of value fast
..."""return the index of the first occurence of item in vec"""
for i in xrange(len(vec)):
if item == vec[i]:
return i
return -1
and then:
>>> a = array([1,7,8,32])
>>> find_first(8,a)
2
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Find element's index in pandas Series
...
In [4]: myseries = pd.Series(data, index=range(1,26))
In [5]: myseries[21]
Out[5]: 150
In [7]: %timeit myseries[myseries == 150].index[...
How to search through all Git and Mercurial commits in the repository for a certain string?
..."search for this" [file...]
There are other options that narrow down the range of revisions that are searched.
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minimum double value in C/C++
...finite-math-only, -fno-rounding-math, -fno-signaling-nans and -fcx-limited-range This option is not turned on by any -O option since it can result in incorrect output for programs which depend on an exact implementation of IEEE or ISO rules/specifications for math functions. It may, however, yield f...
decompiling DEX into Java sourcecode
...
The above sentence rang a bell - it seems to be a semi-quote from here: geeknizer.com/decompile-reverse-engineer-android-apk (or the other way around?). The linked articles briefly explains the above mentioned tools as well as Smali and APKTool...
Preferred Java way to ping an HTTP URL for availability
...s <code>true</code> if the response code is in
* the 200-399 range.
* @param url The HTTP URL to be pinged.
* @param timeout The timeout in millis for both the connection timeout and the response read timeout. Note that
* the total timeout is effectively two times the given timeout....