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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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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:
# ...
栈和队列的面试题Java实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术
... Queue queue = new Queue();
//入队操作
for (int i = 0; i < 5; i++) {
queue.add(i);
}
//出队操作
System.out.println(queue.pop());
System.out.println(queue.pop());
System.out.println(queue.pop());
}
}
运...
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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How to get result of console.trace() as string in javascript with chrome or firefox?
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103
I'm not sure about firefox, but in v8/chrome you can use a method on the Error constructor call...
How to access test resources in Scala?
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202
Resources are meant to be accessed using the special getResource style methods that Java provid...
How to use the CSV MIME-type?
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edited Nov 8 '11 at 10:36
chiborg
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answe...
How to test if one java class extends another at runtime?
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answered Aug 17 '10 at 16:48
meritonmeriton
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git ignore all files of a certain type, except those in a specific subfolder
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edited May 24 '12 at 10:57
cmbuckley
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answere...
How do you turn off auto-capitalisation in HTML form fields in iOS?
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edited May 11 '15 at 18:07
Beau Smith
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answered...