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Efficient way to apply multiple filters to pandas DataFrame or Series

...turn op(x[col],n) In [15]: def f(x, *b): return x[(np.logical_and(*b))] In [16]: b1 = b(df, 'col1', ge, 1) In [17]: b2 = b(df, 'col1', le, 1) In [18]: f(df, b1, b2) Out[18]: col1 col2 1 1 11 Update: pandas 0.13 has a query method for these kind of use cases, assuming c...
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How is a CRC32 checksum calculated?

... 1100001010 = Quotient (nobody cares about the quotient) _______________ 10011 ) 11010110110000 = Augmented message (1101011011 + 0000) =Poly 10011,,.,,.... -----,,.,,.... 10011,.,,.... 10011,.,,.... -----,.,,.... 00001.,,.... ...
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How to do Base64 encoding in node.js?

...wered May 31 '11 at 2:46 onteria_onteria_ 57.1k66 gold badges6363 silver badges6060 bronze badges ...
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How to describe “object” arguments in jsdoc?

... a @config tag which immediately followed the corresponding @param, but it appears to have been deprecated (example here). share | improve this answer | follow ...
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Converting integer to string in Python

... string is done with the builtin str() function, which basically calls the __str__() method of its parameter. share | improve this answer | follow | ...
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Error: 10 $digest() iterations reached. Aborting! with dynamic sortby predicate

...inds of situations: Use ngInit directive in templates (for toy/example apps only, not recommended for real applications) Here's a jsFiddle with a working example. share | improve this answer...
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Should I use Vagrant or Docker for creating an isolated environment? [closed]

.... Also, unless you have a Mac or Windows stack (which is unlikely but can happen), you do not want to run Docker anywhere but on linux. The docker client works fine on Mac, should work soon on BSD and the daemon will eventually support BSD, Solaris and Mac. – creack ...
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Will the base class constructor be automatically called?

...ered Oct 31 '12 at 19:21 Science_FictionScience_Fiction 3,2131414 silver badges2424 bronze badges ...
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Global variables in Java

...class gets unloaded the variables will be undefined null. If you sell your app this will happen sooner or later and you keep looking for error everywhere but not there.... – user387184 Nov 5 '11 at 19:55 ...
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How can I profile Python code line-by-line?

... I believe that's what Robert Kern's line_profiler is intended for. From the link: File: pystone.py Function: Proc2 at line 149 Total time: 0.606656 s Line # Hits Time Per Hit % Time Line Contents =================================================...