C++ 将向量的元素添加到无序集合
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adding elements of a vector to an unordered set
提问by jamesatha
Is there an easy way to add all the elements of a vector
to an unordered_set
? They are of the same type. Right now, I am using a for loop and was wondering if there is a better way to do it
有没有一种简单的方法可以将 a 的所有元素添加vector
到 an 中unordered_set
?它们属于同一类型。现在,我正在使用 for 循环并想知道是否有更好的方法来做到这一点
回答by mythagel
If you're constructing the unordered_set then:
如果您正在构建 unordered_set,则:
std::vector<int> v;
std::unordered_set<int> s(v.begin(), v.end());
回答by Karthik T
Forgive me if my syntax has any minor bugs, but you can try the std::copy function, its meant for this purpose.
如果我的语法有任何小错误,请原谅我,但您可以尝试std::copy 函数,它就是为此目的而设计的。
std::vector<int> v;
std::unordered_set<int> s;
std::copy(v.begin(),v.end(),std::inserter(s,s.end()));