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How to get the parents of a Python class?
...tes (as I am typing this) but this is SO much simpler than some convoluted for loop, looking into bases one class at a time, not to mention when a class extends TWO or more parent classes. Importing and using inspect just clouds the scope unnecessarily. It honestly is a shame people don't know to ...
How to automatically generate a stacktrace when my program crashes
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For Linux and I believe Mac OS X, if you're using gcc, or any compiler that uses glibc, you can use the backtrace() functions in execinfo.h to print a stacktrace and exit gracefully when you get a segmentation fault. Documen...
Multiple levels of 'collection.defaultdict' in Python
...'t pickle, meaning multiprocessing is unhappy about sending these back and forth.
– Noah
Mar 27 '12 at 16:49
19
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How do I detect a click outside an element?
...uld be avoided as it breaks normal event flow in the DOM. See this article for more information. Consider using this method instead
Attach a click event to the document body which closes the window. Attach a separate click event to the container which stops propagation to the document body.
$(win...
Import a module from a relative path
...ckages (do have the __init__.py file inside them), here is a safe solution for inclusion of modules relatively to the location of the script.
I assume that you want to do this, because you need to include a set of modules with your script. I use this in production in several products and works in m...
How to validate an e-mail address in swift?
...z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,64}"
let emailPred = NSPredicate(format:"SELF MATCHES %@", emailRegEx)
return emailPred.evaluate(with: email)
}
for versions of Swift earlier than 3.0:
func isValidEmail(email: String) -> Bool {
let emailRegEx = "[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]...
`if __name__ == '__main__'` equivalent in Ruby
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It's handy, though, for testing things -- you can put module tests in there and run them just from the module file without any wrapper.
– ebneter
Feb 12 '10 at 3:11
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Why is the order in dictionaries and sets arbitrary?
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Note: This answer was written before the implementation of the dict type changed, in Python 3.6. Most of the implementation details in this answer still apply, but the listing order of keys in dictionaries is no longer determined by hash values. The set imp...
std::function and std::bind: what are they, and when should they be used?
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std::bind is for partial function application.
That is, suppose you have a function object f which takes 3 arguments:
f(a,b,c);
You want a new function object which only takes two arguments, defined as:
g(a,b) := f(a, 4, b);
g is a...
List all indexes on ElasticSearch server?
...
For a concise list of all indices in your cluster, call
curl http://localhost:9200/_aliases
this will give you a list of indices and their aliases.
If you want it pretty-printed, add pretty=true:
curl http://localhost:9...