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move elements from vector to unordered_set

intricate_symbol answered on August 29, 2021 Popularity 5/10 Helpfulness 2/10

answer move elements from vector to unordered_set

related unordered_set to vector

move elements from vector to unordered_set

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#include <iostream>
#include <vector>
#include <unordered_set>
 
int main()
{
    std::vector<int> input({ 1, 2, 2, 1, 3, 1, 4 });
 
    std::unordered_set<int> set(input.begin(), input.end());
 
    for (const int &i: set) {
        std::cout << i << " ";
    }
 
    return 0;
}

Popularity 5/10 Helpfulness 2/10 Language cpp

Source: www.techiedelight.com

Tags: c++ elements move vector

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Contributed on Aug 29 2021

intricate_symbol

0 Answers Avg Quality 2/10

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unordered_set to vector

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Before C++17
vector.insert(vector.end(), set.begin(), set.end());

After C++17
vector.reserve(set.size());
for (auto it = set.begin(); it != set.end(); ) {
    vector.push_back(std::move(set.extract(it++).value()));
}

Popularity 9/10 Helpfulness 4/10 Language cpp

Source: stackoverflow.com

Tags: c++ vector c+

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Contributed on Aug 29 2021

intricate_symbol

0 Answers Avg Quality 2/10

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move elements from vector to unordered_set

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