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Why are unnamed namespaces used and what are their benefits?
...here */ }
The extra step using the empty body is important, so you can already refer within the namespace body to identifiers like ::name that are defined in that namespace, since the using directive already took place.
This means you can have free functions called (for example) help that can ex...
What is a good choice of database for a small .NET application? [closed]
...
Instead of leaving the small hard to read message at the top of your answer that explains that the information is outdated. It might be easier just to update and/or append to your answer and include some examples of options available today.
...
Should I use encoding declaration in Python 3?
... followed by a recognised codec).
Note that it only applies to how Python reads the source code. It doesn't apply to executing that code, so not to how printing, opening files, or any other I/O operations translate between bytes and Unicode. For more details on Python, Unicode, and encodings, I str...
How to generate a random number in C++?
...plementation) then you will get exactly the same sequence of rand() values read after that in both applications.
However in your example application pseudo-random sequence consists only of one element - the first element of a pseudo-random sequence generated from seed equal to current time of second...
Mocking a class: Mock() or patch()?
...ck with Python and was wondering which of those two approaches is better (read: more pythonic).
2 Answers
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Hidden features of Python [closed]
...rgument
For instance:
def seek_next_line(f):
for c in iter(lambda: f.read(1),'\n'):
pass
The iter(callable, until_value) function repeatedly calls callable and yields its result until until_value is returned.
...
How do you reverse a string in place in C or C++?
...ed XOR-swap for this simple version, too. Fixed for the benefit of future readers of this popular question. XOR-swap is highly not recommended; hard to read and making your code compile less efficiently. You can see on the Godbolt compiler explorer how much more complicated the asm loop body is w...
What are some (concrete) use-cases for metaclasses?
...ecently, and came up with several answers. I hope it's OK to revive this thread, as I wanted to elaborate on a few of the use cases mentioned, and add a few new ones.
Most metaclasses I've seen do one of two things:
Registration (adding a class to a data structure):
models = {}
class ModelMetac...
Is there a good reason I see VARCHAR(255) used so often (as opposed to another length)?
...
@CharlesBretana: if you read the rest of the sentence you quoted, you will find the exact explanation you are requesting.
– chaos
Feb 17 '16 at 16:07
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Why is Everyone Choosing JSON Over XML for jQuery? [closed]
...alization format for your data, JSON is smaller, lighterweight, more human readable, and generally faster than XML.
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