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What are the most widely used C++ vector/matrix math/linear algebra libraries, and their cost and be

It seems that many projects slowly come upon a need to do matrix math, and fall into the trap of first building some vector classes and slowly adding in functionality until they get caught building a half-assed custom linear algebra library, and depending on it. ...
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Variable number of arguments in C++?

... You probably shouldn't, and you can probably do what you want to do in a safer and simpler way. Technically to use variable number of arguments in C you include stdarg.h. From that you'll get the va_list type as well as three functions that opera...
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rmagick gem install “Can't find Magick-config”

...stall the rmagick gem. I am on Snowleopard 10.6 using RVM, Ruby 1.9.2-head and Rails 3.05. Responses to similar questions recommended installing ImageMagick, which I successfully did. Other suggested installing the "libmagick9-dev library", however, I can not figure out how to do this. ...
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How to implement history.back() in angular.js

I have directive which is site header with back button and I want on click to go back to the previous page. How do I do it in the angular way? ...
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How to copy DLL files into the same folder as the executable using CMake?

... I'd use add_custom_command to achieve this along with cmake -E copy_if_different.... For full info run cmake --help-command add_custom_command cmake -E So in your case, if you have the following directory structure: /CMakeLists.txt /src /lib...
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DateTime.Now vs. DateTime.UtcNow

...nciples of how the two properties work. I know the second one is universal and basically doesn't deal with time zones, but can someone explain in detail how they work and which one should be used in what scenario? ...
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What are major differences between C# and Java?

.... I don't care about it. I've been asked this question on my job interview and I thought it might be useful to learn a bit more. ...
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Can I get CONST's defined on a PHP class?

I have several CONST's defined on some classes, and want to get a list of them. For example: 12 Answers ...
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What does the '.' (dot or period) in a Go import statement do?

In the Go tutorial, and most of the Go code I've looked at, packages are imported like this: 3 Answers ...
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How to define a List bean in Spring?

...gt; </util:list> The value-type is the generics type to be used, and is optional. You can also specify the list implementation class using the attribute list-class. share | improve this an...