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How to know if an object has an attribute in Python
...Exists"
The disadvantage here is that attribute errors in the properties __get__ code are also caught.
Otherwise, do-
if hasattr(someObject, 'someProp'):
#Access someProp/ set someProp
pass
Docs:http://docs.python.org/library/functions.html
Warning:
The reason for my recommendation is ...
When should static_cast, dynamic_cast, const_cast and reinterpret_cast be used?
...inheritance hierarchies. It is unnecessary when casting upwards (towards a base class), but when casting downwards it can be used as long as it doesn't cast through virtual inheritance. It does not do checking, however, and it is undefined behavior to static_cast down a hierarchy to a type that isn'...
Bin size in Matplotlib (Histogram)
...width in this example could be found by: (data.max() - data.min()) / number_of_bins_you_want. The + binwidth could be changed to just 1 to make this a more easily understood example.
– Jarad
Jan 22 '18 at 17:31
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“find: paths must precede expression:” How do I specify a recursive search that also finds files in
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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How to set environment variables in Python?
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@darth_coder It's true for all processes on Unix-like operating systems. I don't know about the other operating system. Note that shell variables are not stored in the environment unless you export them.
– S...
Can an Android NFC phone act as an NFC tag?
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This is outdated. Android 4.4 has host-based card emulation, which allows precisely this: developer.android.com/guide/topics/connectivity/nfc/hce.html
– Trevor Johns
Jan 26 '14 at 18:42
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How to get the request parameters in Symfony 2?
...ndation\Request;
public function updateAction(Request $request)
{
// $_GET parameters
$request->query->get('name');
// $_POST parameters
$request->request->get('name');
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Why does MYSQL higher LIMIT offset slow the query down?
...next page. In other words, offset often needs to be calculated dynamically based on page and limit, instead of following a continuous pattern.
– Tom
Dec 28 '13 at 14:23
3
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Collapse sequences of white space into a single character and trim string
... d*mn line endings and auto-format... it doesn't deal with "hello______foo" (assume _ -> " " because formatting comments is hard)
– Brian Postow
Sep 15 '09 at 14:11
32...
Perl build, unit testing, code coverage: A complete working example
... 12 wallclock secs ( 0.00 cusr + 0.00 csys = 0.00 CPU)
cover
Reading database from D:/Documents and Settings/LeuchKW/workspace/HelloPerlBuildWorld/cover_db
----------------------------------- ------ ------ ------ ------ ------ ------
File stmt bran cond su...