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CPU Privilege Rings: Why rings 1 and 2 aren't used?

...the modern protection model) only has a concept of privileged (ring 0,1,2) and unprivileged, the benefit to rings 1 and 2 were diminished greatly. The intent by Intel in having rings 1 and 2 is for the OS to put device drivers at that level, so they are privileged, but somewhat separated from the r...
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Open file in a relative location in Python

...thon code is executed in not known by prior windows directory say 'main' , and wherever code is installed when it runs it needs to access to directory 'main/2091/data.txt' . ...
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How do I programmatically determine operating system in Java?

... I'm using Windows 10 and yet os.name gives me Windows 8.1. Why is that? Where is this coming from? – Brian Feb 7 '16 at 19:59 ...
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Importing CommonCrypto in a Swift framework

... Something a little simpler and more robust is to create an Aggregate target called "CommonCryptoModuleMap" with a Run Script phase to generate the module map automatically and with the correct Xcode/SDK path: The Run Script phase should contain thi...
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Stopwatch vs. using System.DateTime.Now for timing events [duplicate]

I wanted to track the performance of my code so I stored the start and end time using System.DateTime.Now . I took the difference between the two as the time my code to execute. ...
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os.walk without digging into directories below

... Does this function actually "walk" through the whole structure and then delete the entries below a certain point? Or is something more clever going on? I'm not even sure how to check this with code. --python beginner – mathtick Aug 19 '10 at 18:05 ...
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HSL to RGB color conversion

...(which he attributes to a now defunct mjijackson.com, but is archived here and the original author has a gist - thanks to user2441511). The code is re-posted below: HSL to RGB: /** * Converts an HSL color value to RGB. Conversion formula * adapted from http://en.wikipedia.org/wiki/HSL_color_sp...
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An example of how to use getopts in bash

...t;0 (for the sake of simplicity I didn't differentiate between those cases and nobody forces you to print the usage text in the latter case). I have seen programs which always return != 0, though, even on -h/--help. Maybe I should update the snippet in case people use this as boilerplate (I hope not...
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What does a just-in-time (JIT) compiler do?

...cifically do as opposed to a non-JIT compiler? Can someone give a succinct and easy to understand description? 18 Answers ...
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How to monitor the memory usage of Node.js?

... node-memwatch : detect and find memory leaks in Node.JS code. Check this tutorial Tracking Down Memory Leaks in Node.js share | improve this ans...