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Does pandas iterrows have performance issues?
...ly at the start of the iteration; this savings alone is one of the biggest wins.
Better caching: Iterating over a C array is cache-friendly and thus very fast. A pandas DataFrame is a "column-oriented table", which means that each column is really just an array. So the native actions you can perform...
Copy a file in a sane, safe and efficient way
...ning the number of bytes actually transferred. (This is true on
both 32-bit and 64-bit systems.)
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Do I need to convert .CER to .CRT for Apache SSL certificates? If so, how?
... cryptographic certificates aren't really as standardized as you'd expect. Windows by default treats double-clicking a .crt file as a request to import the certificate into the Windows Root Certificate store, but treats a .cer file as a request just to view the certificate. So, they're different in ...
Increase heap size in Java
I am working on a Windows 2003 server (64-bit) with 8 GB RAM. How can I increase the heap memory maximum? I am using the -Xmx1500m flag to increase the heap size to 1500 Mb. Can I increase the heap memory to 75% of physical memory (6 GB Heap)?
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Automatically start a Windows Service on install
I have a Windows Service which I install using the InstallUtil.exe. Even though I have set the Startup Method to Automatic, the service does not start when installed, I have to manually open the services and click start. Is there a way to start it either via the command line, or through the code of ...
Convert base-2 binary number string to int
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Another way to do this is by using the bitstring module:
>>> from bitstring import BitArray
>>> b = BitArray(bin='11111111')
>>> b.uint
255
Note that the unsigned integer is different from the signed integer:
>>> b.int
-1
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Impossible to Install PG gem on my mac with Mavericks
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A bit more detailed description about what happens here deveiate.org/code/pg/README-OS_X_rdoc.html
– Julia Usanova
Apr 5 '18 at 11:54
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What does static_assert do, and what would you use it for?
...ween assert from <cassert> and static_assert
– bitek
Jan 16 '13 at 15:23
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Is there a REAL performance difference between INT and VARCHAR primary keys?
...ver changes over time and would be a good candidate for a primary key. But bitter experience is that is seldom so.
INT AUTO_INCREMENT meets the "unique and unchanging over time" condition. Hence the preference.
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“An attempt was made to load a program with an incorrect format” even when the platforms are the sam
I'm calling functions from a 32-bit unmanaged DLL on a 64-bit system. What I get is:
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