hash_map::count (STL/CLR)
The latest version of this topic can be found at hash_map::count (STL/CLR).
Finds the number of elements matching a specified key.
Syntax
size_type count(key_type key);
Parameters
key
Key value to search for.
Remarks
The member function returns the number of elements in the controlled sequence that have equivalent ordering with key. You use it to determine the number of elements currently in the controlled sequence that match a specified key.
Example
// cliext_hash_map_count.cpp
// compile with: /clr
#include <cliext/hash_map>
typedef cliext::hash_map<wchar_t, int> Myhash_map;
int main()
{
Myhash_map c1;
c1.insert(Myhash_map::make_value(L'a', 1));
c1.insert(Myhash_map::make_value(L'b', 2));
c1.insert(Myhash_map::make_value(L'c', 3));
// display contents " [a 1] [b 2] [c 3]"
for each (Myhash_map::value_type elem in c1)
System::Console::Write(" [{0} {1}]", elem->first, elem->second);
System::Console::WriteLine();
System::Console::WriteLine("count(L'A') = {0}", c1.count(L'A'));
System::Console::WriteLine("count(L'b') = {0}", c1.count(L'b'));
System::Console::WriteLine("count(L'C') = {0}", c1.count(L'C'));
return (0);
}
[a 1] [b 2] [c 3]
count
(L'A') = 0
count
(L'b') = 1
count
(L'C') = 0
Requirements
Header: <cliext/hash_map>
Namespace: cliext