std::unordered_multimap::empty
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< cpp | container | unordered multimap
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bool empty()const; | (seit C++11) | |
Prüft, ob der Behälter keine Elemente, dh ob begin()== end() .
Original:
Checks if the container has no elements, i.e. whether begin()== end().
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Inhaltsverzeichnis |
[Bearbeiten]Parameter
(None)
Original:
(none)
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[Bearbeiten]Rückgabewert
true wenn der Behälter leer ist, false anders
Original:
true if the container is empty, false otherwise
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[Bearbeiten]Ausnahmen
[Bearbeiten]Komplexität
Constant
Original:
Constant
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[Bearbeiten]Beispiel
Der folgende Code verwendet
empty, um zu überprüfen, ob ein std::unordered_multimap<int> enthält alle Elemente: Original:
The following code uses
empty to check if a std::unordered_multimap<int> contains any elements: The text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.
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#include <unordered_multimap>#include <iostream> int main(){std::unordered_multimap<int> numbers;std::cout<<"Initially, numbers.empty(): "<< numbers.empty()<<'\n'; numbers.push_back(42); numbers.push_back(13317);std::cout<<"After adding elements, numbers.empty(): "<< numbers.empty()<<'\n';}
Output:
Initially, numbers.empty(): 1 After adding elements, numbers.empty(): 0
See also
liefert die Anzahl der Elemente Original: returns the number of elements The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. (öffentliche Elementfunktion) | |
