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| -rw-r--r-- | c++.html.markdown | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/c++.html.markdown b/c++.html.markdown index 8be5a278..225472cb 100644 --- a/c++.html.markdown +++ b/c++.html.markdown @@ -1057,6 +1057,8 @@ cout << ST.size(); // will print the size of set ST // Output: 0 // NOTE: for duplicate elements we can use multiset +// NOTE: For hash sets, use unordered_set. They are more effecient but +// do not preserve order. unordered_set is available since C++11 // Map // Maps store elements formed by a combination of a key value @@ -1084,6 +1086,8 @@ cout << it->second; // Output: 26 +// NOTE: For hash maps, use unordered_map. They are more effecient but do +// not preserve order. unordered_map is available since C++11. /////////////////////////////////// // Logical and Bitwise operators |