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Group by & count function in sqlalchemy
I want a "group by and count" command in sqlalchemy. How can I do this?
3 Answers
3
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Function overloading by return type?
... mainstream statically typed languages support function/method overloading by return type? I can't think of any that do. It seems no less useful or reasonable than supporting overload by parameter type. How come it's so much less popular?
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How to remove ASP.Net MVC Default HTTP Headers?
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X-Powered-By is a custom header in IIS. Since IIS 7, you can remove it by adding the following to your web.config:
<system.webServer>
<httpProtocol>
<customHeaders>
<remove name="X-Powered-By" />
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When to use ref and when it is not necessary in C#
...ions that I pass the object to to modify the state. I have been passing it by ref to the worker functions. However I came across the following function.
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Generating statistics from Git repository [closed]
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Beside GitStats (git history statistics generator) mentioned by xyld, written in Python and requiring Gnuplot for graphs, there is also
gitstat (SourceForge) project (web-based git statistics interface), written in PHP and Perl,
Git Statistics, aka gitstats (metrics framework designed...
C++ - passing references to std::shared_ptr or boost::shared_ptr
...p points to an object that cannot be destroyed during this function
}
So by using a reference to a shared_ptr, you disable that guarantee. So in your second case:
Class::only_work_with_sp(boost::shared_ptr<foo> &sp) //Again, no copy here
{
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sp->do_something();
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MongoDB SELECT COUNT GROUP BY
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how do you group sort to it? I want to sort count by -1
– Filip Bartuzi
Jun 26 '17 at 15:19
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Should I pass an std::function by const-reference?
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If you want performance, pass by value if you are storing it.
Suppose you have a function called "run this in the UI thread".
std::future<void> run_in_ui_thread( std::function<void()> )
which runs some code in the "ui" thread, then signals...
Domain Driven Design: Domain Service, Application Service
Can someone explain the difference between domain and application services by providing some examples? And, if a service is a domain service, would I put the actual implementation of this service within the domain assembly and if so, would I also inject repositories into that domain service? Some in...
Passing an integer by reference in Python
How can I pass an integer by reference in Python?
11 Answers
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