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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...ulates 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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Calculate date/time difference in java [duplicate]
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17 Answers
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“unrecognized import path” with go get
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102
The issues are relating to an invalid GOROOT.
I think you installed Go in /usr/local/go.
So c...
Get file name from URL
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192
Instead of reinventing the wheel, how about using Apache commons-io:
import org.apache.common...
How to cherry pick from 1 branch to another
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How can I tell if one commit is a descendant of another commit?
...). git rev-parse is here needed to convert from commit name to commit SHA-1 / commit id.
Using git rev-list like in VonC answer is also possibility.
Edit: in modern Git there is explicit support for this query in the form of git merge-base --is-ancestor.
If one of commits you are asking about ...
Find the extension of a filename in Ruby
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167
That's really basic stuff:
irb(main):002:0> accepted_formats = [".txt", ".pdf"]
=> [".t...
How can I catch a ctrl-c event?
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174
signal isn't the most reliable way as it differs in implementations. I would recommend using s...
Scala 2.8 breakOut
...e the best builder possible. For example, if I were to write Map('a' -> 1).map(_.swap), I'd like to get a Map(1 -> 'a') back. On the other hand, a Map('a' -> 1).map(_._1) can't return a Map (it returns an Iterable).
The magic of producing the best possible Builder from the known types of t...
Run an OLS regression with Pandas Data Frame
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I think you can almost do exactly what you thought would be ideal, using the statsmodels packa...