equal_range
Function Details
equal_range(const key_type &x) const
Find the range within which all keys equal to specified key x.
Parameters
x
The target key to find.
Return Value
The range [first, last).
See Also
http://www.cplusplus.com/reference/stl/map/equal_range/
equal_range(const key_type &x,
bool readonly=false)
Find the range within which all keys equal to specified key x.
Parameters
x
The target key to find.
readonly
Whether the returned iterator is readonly.
Return Value
The range [first, last).
See Also
http://www.cplusplus.com/reference/stl/map/equal_range/
Group: Searching Functions
The following functions are returning iterators, and they by default return read-write iterators.
If you intend to use the returned iterator only to read, you should call the const version of each function using a const reference to this container. Using const iterators can potentially promote concurrency a lot. You can also set the readonly parameter to each non-const version of the functions to true if you don't use the returned iterator to write, which also promotes concurrency and overall performance.