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Rotating a two-dimensional array in Python
...nclose the whole thing in list() to get an actual list back out, so as of 2020 it's actually:
list(zip(*original[::-1]))
Here's the breakdown:
[::-1] - makes a shallow copy of the original list in reverse order. Could also use reversed() which would produce a reverse iterator over the list rather...
How do I get python's pprint to return a string instead of printing?
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edited Mar 10 '15 at 17:03
Bryan Oakley
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Keep the window's name fixed in tmux
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answered Nov 30 '15 at 17:34
preactionpreaction
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How to migrate back from initial migration in Django 1.7?
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200
You can do the same with Django 1.7+ also:
python manage.py migrate <app> zero
This cl...
C# List to string with delimiter
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1250
You can use String.Join. If you have a List<string> then you can call ToArray first:
Li...
presentModalViewController:Animated is deprecated in ios6
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answered Apr 8 '13 at 8:03
VishalVishal
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Pick a random element from an array
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print(array.randomElement()!) // Using ! knowing I have array.count > 0
If you don't create the array and aren't guaranteed count > 0, you should do something like:
if let randomElement = array.randomElement() {
print(randomElement)
}
Swift 4.1 and below
Just to answer your questi...
Equivalent C++ to Python generator pattern
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80
Generators exist in C++, just under another name: Input Iterators. For example, reading from std...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ates the inverse square root of a float, 4x faster than regular (float)(1.0/sqrt(x)) , including a strange 0x5f3759df constant. See the code below. Can someone explain line by line what exactly is going on here and why this works so much faster than the regular implementation?
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Python : List of dict, if exists increment a dict value, if not append a new dict
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210
That is a very strange way to organize things. If you stored in a dictionary, this is easy:
# ...