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sqlalchemy IS NOT NULL select
...usage of IS NOT may be desirable if comparing to boolean values on certain platforms.
Demo:
>>> from sqlalchemy.sql import column
>>> column('YourColumn') != None
<sqlalchemy.sql.elements.BinaryExpression object at 0x10c8d8b90>
>>> str(column('YourColumn') != None...
Check if a string is a date value
... like 'Invalid Date' (Are you sure this message is exactly the same on all platforms? In all locales? In the future?) or you can use a tested solution and use your time to improve it, not reinvent it. All of the libraries listed here are open source, free software.
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How do I activate C++ 11 in CMake?
...ot require touching each target's properties individually, and works cross-platform.
– DevSolar
Jan 20 '16 at 12:49
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Which .NET Dependency Injection frameworks are worth looking into? [closed]
...b, Windows, etc.
Castle Windsor is one of the most widely used in the .NET platform and has the largest ecosystem, is highly configurable / extensible, has custom lifetime management, AOP support, has inherent NHibernate support and is an all around awesome container. Windsor is part of an entire st...
What uses are there for “placement new”?
...t;memory>, otherwise you might run into some terrible headaches in some platforms that do not automatically recognize placement new
– Ramon Zarazua B.
Sep 24 '09 at 18:28
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How to flush output of print function?
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If you're running it on Linux/Unix platform, you can add the -u in the interpreter command line (first line of the script file), so change the first line from (something like) #!/usr/bin/python3 to #!/usr/bin/python3 -u - now when you run your script (e.g. ./m...
When is CRC more appropriate to use than MD5/SHA1?
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PHP? on an ARM platform, embedded code, 16MHz a CRC32 of 46 bytes, maybe 12 microseconds. That has hardware assist. Even hardware assisted AES would be several hundred times slower. Unassisted lookup table CRC should still come in around 50...
Average of 3 long integers
...t128_t(0, z));
t = t.divideby3();
long average = t.L;
In C/C++ on 64-bit platforms it's much easier with __int128
int64_t average = ((__int128)x + y + z)/3;
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Pure virtual destructor in C++
...sn't have an implementation, undefined behavior will ensue. On one popular platform, that will invoke the purecall handler and crash.
Edit: fixing the declaration to be more conformant, compiled with http://www.comeaucomputing.com/tryitout/
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How do I run a node.js app as a background service?
...otten a lot of attention over the years, I've listed the top solutions per platform at the bottom of this post.
26 Answers
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