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Which characters are valid in CSS class names/selectors?
What characters/symbols are allowed within the CSS class selectors?
I know that the following characters are invalid , but what characters are valid ?
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How do I check if a string is a number (float)?
...r.
I'm not sure that anything much could be faster than the above. It calls the function and returns. Try/Catch doesn't introduce much overhead because the most common exception is caught without an extensive search of stack frames.
The issue is that any numeric conversion function has two kin...
Explaining Python's '__enter__' and '__exit__'
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Using these magic methods (__enter__, __exit__) allows you to implement objects which can be used easily with the with statement.
The idea is that it makes it easy to build code which needs some 'cleandown' code executed (think of it as a try-finally block). Some more ex...
Call a REST API in PHP
...zle is much easier than working with cURL.
Here's an example from the Web site:
$client = new GuzzleHttp\Client();
$res = $client->get('https://api.github.com/user', [
'auth' => ['user', 'pass']
]);
echo $res->getStatusCode(); // 200
echo $res->getHeader('content-type');...
Differences and relationship between glActiveTexture and glBindTexture
...ve "texture unit". Each texture unit can have multiple texture targets (usually GL_TEXTURE_1D, 2D, 3D or CUBE_MAP).
4 Answe...
Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
... gcc-4.8 1.53s 1.52s -Os
In some cases you can alleviate the effect of disadvantageous optimizations by asking gcc to optimize for your particular processor (using options -mtune=native or -march=native):
Processor Compiler Time (-O2 -mtune=native) Time (-Os...
How do I get Pyflakes to ignore a statement?
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# noqa only ignores certain warnings/errors, but not all -- in order to deal with this, a workaround involves installing/using the package at pypi.python.org/pypi/flake8-respect-noqa
– Mark
Jan 18 '16 at 0:15
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How do I execute a string containing Python code in Python?
...;>> x
4
However, the first step should be to ask yourself if you really need to. Executing code should generally be the position of last resort: It's slow, ugly and dangerous if it can contain user-entered code. You should always look at alternatives first, such as higher order functions, ...
Get a filtered list of files in a directory
...t a list of files in a directory using Python, but I do not want a list of ALL the files.
14 Answers
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C++ - passing references to std::shared_ptr or boost::shared_ptr
... The shared_ptr that is passed in already lives in a scope, at the call site. You might be able to create an elaborate scenario where the code in this question would blow up due to a dangling pointer, but then I suppose you have bigger problems than the reference parameter!
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