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| -rw-r--r-- | c++.html.markdown | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/c++.html.markdown b/c++.html.markdown index 8be5a278..f1ad0790 100644 --- a/c++.html.markdown +++ b/c++.html.markdown @@ -1027,6 +1027,7 @@ for (it = my_vector.begin(); it != my_vector.end(); ++it) { // Set // Sets are containers that store unique elements following a specific order. +// For hash sets, use unordered_set. They are more effecient but do not preserve order. // Set is a very useful container to store unique values in sorted order // without any other functions or code. @@ -1061,6 +1062,7 @@ cout << ST.size(); // will print the size of set ST // Map // Maps store elements formed by a combination of a key value // and a mapped value, following a specific order. +// For hash maps, use unordered_map. They are more effecient but do not preserve order. #include<map> map<char, int> mymap; // Will initialize the map with key as char and value as int |