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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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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...
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...
Vim: How do you open another [No Name] buffer like the one on startup?
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answered Dec 18 '10 at 13:18
Randy MorrisRandy Morris
35.9k55 gold badges6262 silver badges7373 bronze badges
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Why does gulp.src not like being passed an array of complete paths to files?
...run
– Cynthia Sanchez
Sep 7 '15 at 10:44
4
There's probably always a common base somewhere in the...
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:
# ...
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
283k3030 gold badges396396 silver badges542542 bronze badges
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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...
What is the difference between Numpy's array() and asarray() functions?
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answered Aug 30 '18 at 19:06
abarnertabarnert
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