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C++: Difference between revisions
→std::unordered_map
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====std::unordered_map==== | ====std::unordered_map==== | ||
<code>#include<unordered_map></code><br> | |||
[https://en.cppreference.com/w/cpp/container/unordered_map reference] | |||
<syntaxhighlight lang="C++"> | |||
std::unordered_map<int, std::string> my_map; | |||
my_map.insert(5, "hey"); | |||
my_map.find(5) != my_map.end(); | |||
my_map.contains(5); // C++20 | |||
</syntaxhighlight> | |||
;Custom Keys | ;Custom Keys | ||
How to use a rational number as a key in C++ | How to use a rational number as a key in C++ | ||