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How do I get the result of a command in a variable in windows?

I'm looking to get the result of a command as a variable in a Windows batch script (see how to get the result of a command in bash for the bash scripting equivalent). A solution that will work in a .bat file is preferred, but other common windows scripting solutions are also welcome. ...
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how to emulate “insert ignore” and “on duplicate key update” (sql merge) with postgresql?

...If it doesn't modify any row that means it didn't exist, so do an insert. Obviously, you do this inside a transaction. You can of course wrap this in a function if you don't want to put the extra code on the client side. You also need a loop for the very rare race condition in that thinking. Ther...
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What is the easiest way to remove all packages installed by pip?

I'm trying to fix up one of my virtualenvs - I'd like to reset all of the installed libraries back to the ones that match production. ...
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How to add Google Analytics Tracking ID to GitHub Pages

Could be a simple question but I am full of doubts right now about adding Google Analytics Tracking ID to GitHub page . ...
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method overloading vs optional parameter in C# 4.0 [duplicate]

which one is better? at a glance optional parameter seems better (less code, less XML documentation, etc), but why do most MSDN library classes use overloading instead of optional parameters? ...
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How to convert array values to lowercase in PHP?

...p('strtolower', $yourArray); In case you need to lowercase nested array (by Yahya Uddin): $yourArray = array_map('nestedLowercase', $yourArray); function nestedLowercase($value) { if (is_array($value)) { return array_map('nestedLowercase', $value); } return strtolower($value)...
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Intro to GPU programming [closed]

... Check out CUDA by NVidia, IMO it's the easiest platform to do GPU programming. There are tons of cool materials to read. http://www.nvidia.com/object/cuda_home.html Hello world would be to do any kind of calculation using GPU. Hope that ...
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Daemon Threads Explanation

... Some threads do background tasks, like sending keepalive packets, or performing periodic garbage collection, or whatever. These are only useful when the main program is running, and it's okay to kill them off once the other, non-daemon, threads ...
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How to change tab size on GitHub?

When I view files on GitHub, tabs appear as 8 spaces. 8 Answers 8 ...
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How to get innerHTML of DOMNode?

...ML of a given DOMNode in the PHP DOM implementation? Can someone give reliable solution? 8 Answers ...