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What is a C#'s analog of std::pair in C++? I found System.Web.UI.Pair class, but I'd prefer something template-based. Sep 18, 2008 · 36 std::pair is a data type for grouping two values together as a single object. std::map uses it for key, value pairs. While you're learning pair, you might check out tuple. It's like pair but for. hash<pair<int,int>> depends on primitive and standard library types only. This is easily worked around by defining your hash class outside of namespace std, and using that hash explicitly in your map. unordered_map<size_t,double> Map; We can now use Map[key(i,j)]=value or Map.find(key(i,j)) to operate on the map. Every make_pair now becomes calling the inline key function. This method.
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