How do I initialize a map in C++11?

How do I initialize a map in C++11?

You can initialize a map in C++11 using an initializer list. For example: std::map<int, std::string> myMap = {{1, "one"}, {2, "two"}};

Can I use different types for keys and values?

Yes, you can use different types for keys and values. For instance, std::map<std::string, int> myMap; allows strings as keys and integers as values.

What if I want to initialize it with default values?

You can use the insert method to add default values after initializing the map. For example: myMap.insert({1, "default"});.

Are there any performance considerations I should be aware of?

Yes, the performance can be affected by the choice of key type and the number of elements. Using a balanced tree structure, like std::map, ensures logarithmic time complexity for insertions and lookups.