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Why does pthread_cond_wait have spurious wakeups?

...ion is given by David R. Butenhof in "Programming with POSIX Threads" (p. 80): Spurious wakeups may sound strange, but on some multiprocessor systems, making condition wakeup completely predictable might substantially slow all condition variable operations. In the following comp.programming.th...
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Inheriting class methods from modules / mixins in Ruby

... Sergio TulentsevSergio Tulentsev 203k3636 gold badges337337 silver badges336336 bronze badges ...
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How to get a variable value if variable name is stored as string?

... answered Dec 17 '09 at 12:09 Phil RossPhil Ross 22.5k99 gold badges6666 silver badges7474 bronze badges ...
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TypeScript “this” scoping issue when called in jquery callback

...ance trade-off compared to the first method Good: In TypeScript, this has 100% type safety Good: Works in ECMAScript 3 Good: You only have to type the instance name once Bad: You'll have to type the parameters twice Bad: Doesn't work with variadic parameters ...
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When to use in vs ref vs out

... 404 You should use out unless you need ref. It makes a big difference when the data needs to be ma...
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What is “stdafx.h” used for in Visual Studio?

...afx.h is automatically generated when I start a project in Visual Studio 2010. I need to make a cross-platform C++ library, so I don't/can't use this header file. ...
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Recommended way to save uploaded files in a servlet application

... | edited Jun 20 at 9:12 Community♦ 111 silver badge answered Sep 6 '13 at 18:58 ...
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Get User's Current Location / Coordinates

... 230 To get a user's current location you need to declare: let locationManager = CLLocationManager()...
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How to check if command line tools is installed

I have a macbook pro with OS X 10.8.2. XCode is installed. I know this as it appears in the Applications directory. There are also the xcodebuild and xcode-select files in /usr/bin I need to know if the command line tools is installed. Is there a command for it? What can I do to see if XCode CLT is ...
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Is there a rule-of-thumb for how to divide a dataset into training and validation sets?

...for how to best divide data into training and validation sets? Is an even 50/50 split advisable? Or are there clear advantages of having more training data relative to validation data (or vice versa)? Or is this choice pretty much application dependent? ...