operator[] (key) [Map template]

Gets a reference to an entry with key key. This will create the entry if it does not exist. If there is insufficient memory to allocate a new entry, it will cause a SOS panic. Using set() can provide more control over error conditions.

template<typename T>
ValueT& operator[](const T& key);

Map<String, int> m1({ {"a", 123}, {"b", 456} });
m1["a"] = 999;