What is the difference in getting a value through aMap[key] and aMap.at(key) in C++?
What is the difference in getting a value through aMap[key] and aMap.at(key) in C++?
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What is the difference in getting a value through aMap[key] and aMap.at(key) in C++?
In C++11
map::atexists (who knew?).It throws an exception if the key doesn’t exist,
findreturnsaMap.end()if the element doesn’t exist, andoperator[]value-initializes a new value for the corresponding key if no value exists there.