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Is returning by rvalue reference more efficient?
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Beta_ab&&
Beta::toAB() const {
return move(Beta_ab(1, 1));
}
This returns a dangling reference, just like with the lvalue reference case. After the function returns, the temporary object will get destructed. You should return Beta_ab by value, like the following
Beta_ab...
Example of UUID generation using Boost in C++
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165
A basic example:
#include <boost/uuid/uuid.hpp> // uuid class
#include <b...
Cancellation token in Task constructor: why?
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edited Feb 18 at 9:44
Eliahu Aaron
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How do CSS triangles work?
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edited Apr 6 '18 at 15:35
TylerH
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a...
How to install an apk on the emulator in Android Studio?
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12 Answers
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How to share my Docker-Image without using the Docker-Hub?
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251
Docker images are stored as filesystem layers. Every command in the Dockerfile creates a layer. ...
Android: When is onCreateOptionsMenu called during Activity lifecycle?
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113
The onCreate method is called first, and before it finishes onCreateOptionsMenu is called.
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How to fix java.lang.UnsupportedClassVersionError: Unsupported major.minor version
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51 Answers
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What's the difference between a Python “property” and “attribute”?
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189
Properties are a special kind of attribute. Basically, when Python encounters the following c...