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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...Quake III source code which calculates 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 i...
SQL multiple column ordering
...ted Sep 7 '18 at 9:57
user6269864
answered Jan 12 '10 at 18:03
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
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Assign pandas dataframe column dtypes
...05-01
1 b 2 2018-05-02
df.dtypes
x object
y int64
z datetime64[ns]
dtype: object
and confirm the dtype is updated.
OLD/DEPRECATED ANSWER for pandas 0.12 - 0.16: You can use convert_objects to infer better dtypes:
In [21]: df
Out[21]:
x y
0 a 1
1 b 2
In [...
How can I access “static” class variables within class methods in Python?
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edited Dec 2 '12 at 7:34
Pavel Strakhov
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ans...
plot with custom text for x axis points
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answered Jun 23 '10 at 11:49
unutbuunutbu
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What is the apply function in Scala?
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Muhammad Hewedy
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answered Mar 16 '12 at 14:14
Vlad GudimVlad ...
What is the difference between async.waterfall and async.series
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4 Answers
4
Active
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Nested rows with bootstrap grid system?
I want 1 larger image with 4 smaller images in a 2x2 format like this:
2 Answers
2
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Storing a Map using JPA
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Pascal ThiventPascal Thivent
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