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John Carmack's Unusual Fast Inverse Square Root (Quake III)
...t, 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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How can I detect the encoding/codepage of a text file
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edited Jul 11 '13 at 8:12
Arjun Sol
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answered Sep 18 '08 ...
How should I store GUID in MySQL tables?
Do I use varchar(36) or are there any better ways to do it?
10 Answers
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Insert text with single quotes in PostgreSQL
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803
String literals
Escaping single quotes ' by doubling them up -> '' is the standard way and...
What do the terms “CPU bound” and “I/O bound” mean?
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edited Dec 3 '18 at 13:09
rlandster
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How to add Active Directory user group as login in SQL Server
...marc_s
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This IP, site or mobile application is not authorized to use this API key
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13 Answers
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Active
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How to change options of with jQuery?
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var newOptions = {"Option 1": "value1",
"Option 2": "value2",
"Option 3": "value3"
};
var $el = $("#selectId");
$el.empty(); // remove old options
$.each(newOptions, function(key,value) {
$el.append($("<option></option>")
.attr("value", value).text(key));
});
Edit: For rem...
How to make a countdown timer in Android?
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13 Answers
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Ignore files that have already been committed to a Git repository [duplicate]
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edited Jul 16 '18 at 23:48
community wiki
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