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Check if item is in an array / list
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edited Feb 10 '19 at 21:23
answered Jun 28 '12 at 19:40
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Python group by
Assume that I have a set of data pair where index 0 is the value and index 1 is the type:
6 Answers
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Why does SIGPIPE exist?
...ICER.. GitHub STOP HELPING ICE
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Parallel.ForEach vs Task.Factory.StartNew
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The first is a much better option.
Parallel.ForEach, internally, uses a Partitioner<T> t...
Modulo operation with negative numbers
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edited Nov 24 '16 at 10:41
answered Jul 30 '12 at 11:43
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What is the difference between String.slice and String.substring?
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If either argument is negative or is NaN, it is treated as if it were 0.
Distinctions of slice():
If start > stop, slice() will return the empty string. ("")
If start is negative: sets char from the end of string, exactly like substr() in Firefox. This behavior is observed in both Firefo...
How to export plots from matplotlib with transparent background?
...e keyword argument transparent=True to save the image as a png file.
In [30]: x = np.linspace(0,6,31)
In [31]: y = np.exp(-0.5*x) * np.sin(x)
In [32]: plot(x, y, 'bo-')
Out[32]: [<matplotlib.lines.Line2D at 0x3f29750>]
In [33]: savefig('demo.png', transparent=True)
Result:
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Effective way to find any file's Encoding
...oes not have a BOM, this cannot determine the file's encoding.
*UPDATED 4/08/2020 to include UTF-32LE detection and return correct encoding for UTF-32BE
/// <summary>
/// Determines a text file's encoding by analyzing its byte order mark (BOM).
/// Defaults to ASCII when detection of the tex...
How to merge a transparent png image with another image using PIL
....png")
foreground = Image.open("test2.png")
background.paste(foreground, (0, 0), foreground)
background.show()
First parameter to .paste() is the image to paste. Second are coordinates, and the secret sauce is the third parameter. It indicates a mask that will be used to paste the image. If you p...
How to select first parent DIV using jQuery?
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edited Jun 8 '17 at 17:01
Nigel B. Peck
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answe...