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Multiple aggregations of the same column using pandas GroupBy.agg()

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What are 'get' and 'set' in Swift?

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Is there a way to instantiate objects from a string holding their class name?

... boost::functional has a factory template which is quite flexible: http://www.boost.org/doc/libs/1_54_0/libs/functional/factory/doc/html/index.html My preference though is to generate wrapper classes which hide the mapping and object creation mechanism. The common scenario I encounter is the need ...
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Does setting Java objects to null do anything anymore?

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Can you help me understand Moq Callback?

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Why do I need Transaction in Hibernate for read-only operations?

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Should I put the Google Analytics JS in the or at the end of ?

...src=g;m.parentNode.insertBefore(a,m) })(window,document,'script','https://www.google-analytics.com/analytics.js','ga'); ga('create', 'UA-XXXXX-Y', 'auto'); ga('send', 'pageview'); </script> <!-- End Google Analytics --> The above code does four main things: Creates a ele...
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Is there a standard sign function (signum, sgn) in C/C++?

... template <class T> inline int sign (const T& z); http://www.boost.org/doc/libs/1_47_0/libs/math/doc/sf_and_dist/html/math_toolkit/utils/sign_functions.html share | improve this an...
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Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?

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How to check BLAS/LAPACK linkage in NumPy and SciPy?

... If you installed anaconda-navigator (at www.anaconda.com/anaconda/install/ for linux, Windows or macOS) - blas, scipy and numpy will all be installed and you can see them by clicking environments tab on left side of navigator home page (look for each directory in a...