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Compelling examples of custom C++ allocators?

What are some really good reasons to ditch std::allocator in favor of a custom solution? Have you run across any situations where it was absolutely necessary for correctness, performance, scalability, etc? Any really clever examples? ...
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Disable messages upon loading a package

...y R script is being used for further analysis I want to completely disable all of this output. How do I do that? Furthermore, I'd prefer to do it without having to modify ROCR at all, so that future users of this script don't have to do that either. ...
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How can I list all foreign keys referencing a given table in SQL Server?

...highly referenced table in a SQL Server database. How can I get a list of all the foreign key constraints I will need to remove in order to drop the table? ...
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Elegant Python function to convert CamelCase to snake_case?

... name = pattern.sub('_', name).lower() To handle more advanced cases specially (this is not reversible anymore): def camel_to_snake(name): name = re.sub('(.)([A-Z][a-z]+)', r'\1_\2', name) return re.sub('([a-z0-9])([A-Z])', r'\1_\2', name).lower() print(camel_to_snake('camel2_camel2_case')) #...
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Pass complex parameters to [Theory]

... InlineData attributes, and xUnit will generate many tests, and test them all. 8 Answers ...
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Converting from a string to boolean in Python?

... | edited Apr 29 at 7:32 desolat 3,86366 gold badges2929 silver badges4545 bronze badges answered Au...
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Convert datetime object to a String of date only in Python

... If you want the time as well, just go with datetime.datetime.now().__str__() Prints 2019-07-11 19:36:31.118766 in console for me share | improve this answer | follo...
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Suppressing “warning CS4014: Because this call is not awaited, execution of the current method conti

This is not a duplicate of "How to safely call an async method in C# without await" . 8 Answers ...
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Is there a way to iterate over a dictionary?

...ere you need a key in order to get a value . But how can I iterate over all keys and values in a NSDictionary , so that I know what keys there are, and what values there are? I know there is something called a for-in-loop in JavaScript . Is there something similar in Objective-C ? ...
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How can I implement a tree in Python?

... I came across this answer via Google. This library is really nice. I especially love the ability to use the mixin class to make an tree of any object! – Rÿck Nöthing Mar 8 '19 at 1:21 ...