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TypeError: ObjectId('') is not JSON serializable
My response back from MongoDB after querying an aggregated function on document using Python, It returns valid response and i can print it but can not return it.
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visual c++: #include files from other projects in the same solution
I am working on a game using Visual C++. I have some components in separate projects, and have set the project dependencies. How do I #include a header file from a different project? I have no idea how to use classes from one project in another.
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Are the shift operators () arithmetic or logical in C?
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According to K&R 2nd edition the results are implementation-dependent for right shifts of signed values.
Wikipedia says that C/C++ 'usually' implements an arithmetic shift on signed values.
Basically you need to either test your com...
C++ Tuple vs Struct
... similar discussion about tuple and struct and I write some simple benchmarks with the help from one of my colleague to identify the differences in term of performance between tuple and struct. We first start with a default struct and a tuple.
struct StructData {
int X;
int Y;
double C...
What's the difference between [ and [[ in Bash? [duplicate]
I looked at bash man page and the [[ says it uses Conditional Expressions. Then I looked at Conditional Expressions section and it lists the same operators as test (and [ ).
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How to convert String to long in Java?
...16 '18 at 15:33
Valentin Michalak
1,6491111 silver badges2323 bronze badges
answered Oct 7 '11 at 22:10
Mike C...
Dialog with transparent background in Android
How do I remove the black background from a dialog box in Android. The pic shows the problem.
20 Answers
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How to access component methods from “outside” in ReactJS?
...>
</div>
);
}
}
Note: This will only work if the child component is declared as a class, as per documentation found here: https://facebook.github.io/react/docs/refs-and-the-dom.html#adding-a-ref-to-a-class-component
Update 2019-04-01: Changed example to use a clas...
In SQL Server, when should you use GO and when should you use semi-colon ;?
I’ve always been confused with when I should use the GO keyword after commands and whether a semi-colon is required at the end of commands. What is the differences and why/when I should use them?
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How does JavaScript .prototype work?
...r really got my head around this prototype-based programming, does any one know how this works?
26 Answers
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