hash_multimap::max_load_factor (STL/CLR)
Gets or sets the maximum elements per bucket.
float max_load_factor();
void max_load_factor(float new_factor);
Parameters
- new_factor
New maximum load factor to store.
Remarks
The first member function returns the current stored maximum load factor. You use it to determine the maximum average bucket size.
The second member function replaces the store maximum load factor with new_factor. No automatic rehashing occurs until a subsequent insert.
Example
// cliext_hash_multimap_max_load_factor.cpp
// compile with: /clr
#include <cliext/hash_map>
typedef cliext::hash_multimap<wchar_t, int> Myhash_multimap;
int main()
{
Myhash_multimap c1 = gcnew Myhash_multimap;
c1.insert(Myhash_multimap::make_value(L'a', 1));
c1.insert(Myhash_multimap::make_value(L'b', 2));
c1.insert(Myhash_multimap::make_value(L'c', 3));
// display contents " [a 1] [b 2] [c 3]"
for each (Myhash_multimap::value_type elem in c1)
System::Console::Write(" [{0} {1}]", elem->first, elem->second);
System::Console::WriteLine();
// inspect current parameters
System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());
System::Console::WriteLine("load_factor() = {0}", c1.load_factor());
System::Console::WriteLine("max_load_factor() = {0}",
c1.max_load_factor());
System::Console::WriteLine();
// change max_load_factor and redisplay
c1.max_load_factor(0.25f);
System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());
System::Console::WriteLine("load_factor() = {0}", c1.load_factor());
System::Console::WriteLine("max_load_factor() = {0}",
c1.max_load_factor());
System::Console::WriteLine();
// rehash and redisplay
c1.rehash(100);
System::Console::WriteLine("bucket_count() = {0}", c1.bucket_count());
System::Console::WriteLine("load_factor() = {0}", c1.load_factor());
System::Console::WriteLine("max_load_factor() = {0}",
c1.max_load_factor());
return (0);
}
[a 1] [b 2] [c 3] bucket_count() = 16 load_factor() = 0.1875 max_load_factor() = 4 bucket_count() = 16 load_factor() = 0.1875 max_load_factor() = 0.25 bucket_count() = 128 load_factor() = 0.0234375 max_load_factor() = 0.25
Requirements
Header: <cliext/hash_map>
Namespace: cliext
See Also
Reference
hash_multimap::bucket_count (STL/CLR)