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How to calculate a time difference in C++
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See std::clock() function.
const clock_t begin_time = clock();
// do something
std::cout << float( clock () - begin_time ) / CLOCKS_PER_SEC;
If you want calculate execution time for self ( not for user ), it is better to do this in clock ticks ( not seco...
What is the proper way to comment functions in Python?
...odule, function, class, or method definition. Such a docstring becomes the __doc__ special attribute of that object.
All modules should normally have docstrings, and all functions and classes exported by a module should also have docstrings. Public methods (including the __init__ constructor) s...
How to write to a file, using the logging Python module?
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make sure this is not under if __name__ == '__main__': if running on apache
– Rami Alloush
Apr 14 '19 at 19:08
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Count how many files in directory PHP
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You can simply do the following :
$fi = new FilesystemIterator(__DIR__, FilesystemIterator::SKIP_DOTS);
printf("There were %d Files", iterator_count($fi));
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Django set field value after a form is initialized
...value after the form was submitted, you can use something like:
if form.is_valid():
form.cleaned_data['Email'] = GetEmailString()
Check the referenced docs above for more on using cleaned_data
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Should I use 'has_key()' or 'in' on Python dicts?
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in is definitely more pythonic.
In fact has_key() was removed in Python 3.x.
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Django select only rows with duplicate field values
...values('name')
.annotate(Count('id'))
.order_by()
.filter(id__count__gt=1)
This is as close as you can get with Django. The problem is that this will return a ValuesQuerySet with only name and count. However, you can then use this to construct a regula...
How to check if variable is string with python 2 and 3 compatibility
...x-compatible code, you'll probably want to use six:
from six import string_types
isinstance(s, string_types)
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Select between two dates with Django
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Use the __range operator:
...filter(current_issue__isnull=True, created_at__range=(start_date, end_date))
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Threading pool similar to the multiprocessing Pool?
...urrent.futures.ThreadPoolExecutor, i.e.:
executor = ThreadPoolExecutor(max_workers=10)
a = executor.submit(my_function)
See the docs for more info and examples.
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