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John Carmack's Unusual Fast Inverse Square Root (Quake III)
John Carmack has a special function in the 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 t...
Gradle: How to Display Test Results in the Console in Real Time?
I would like to see test results ( system.out/err, log messages from components being tested ) as they run in the same console I run:
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How can I ssh directly to a particular directory?
I often have to login to one of several servers and go to one of several directories on those machines. Currently I do something of this sort:
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How do I get the type of a variable?
In C++, how does one find the type of a variable?
10 Answers
10
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Python: Bind an Unbound Method?
In Python, is there a way to bind an unbound method without calling it?
5 Answers
5
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Tools for Generating Mock Data? [closed]
I'm looking for recommendations of a good, free tool for generating sample data for the purpose of loading into test databases. By analogy, something that produces " lorem ipsum " text for any RDBMS. Features I'm looking for include:
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MySQL load NULL values from CSV data
I have a file that can contain from 3 to 4 columns of numerical values which are separated by comma. Empty fields are defined with the exception when they are at the end of the row:
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Https Connection Android
I am doing a https post and I'm getting an exception of ssl exception Not trusted server certificate. If i do normal http it is working perfectly fine. Do I have to accept the server certificate somehow?
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A std::map that keep track of the order of insertion?
I currently have a std::map<std::string,int> that stores an integer value to an unique string identifier, and I do look up with the string. It does mostly what I want, except for that it does not keep track of the insertion order. So when I iterate the the map to print out the values, they a...