operator<= (hash_map)
Tests if the hash_map object on the left side of the operator is less than or equal to the hash_map object on the right side.
bool operator<=(
const hash_map <Key, Type, Traits, Allocator>& _Left,
const hash_map <Key, Type, Traits, Allocator>& _Right
);
Parameters
_Left
An object of type hash_map._Right
An object of type hash_map.
Return Value
true if the hash_map on the left side of the operator is less than or equal to the hash_map on the right side of the operator; otherwise false.
Remark
The comparison between hash_map objects is based on a pairwise comparison of their elements. The less than or equal to relationship between two objects is based on a comparison of the first pair of unequal elements.
In Visual C++ .NET 2003, members of the <hash_map> and <hash_set> header files are no longer in the std namespace, but rather have been moved into the stdext namespace. See The stdext Namespace for more information.
Example
// hash_map_op_le.cpp
// compile with: /EHsc
#define _DEFINE_DEPRECATED_HASH_CLASSES 0
#include <hash_map>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_map <int, int> hm1, hm2, hm3, hm4;
int i;
typedef pair <int, int> Int_Pair;
for ( i = 1 ; i < 3 ; i++ )
{
hm1.insert ( Int_Pair ( i, i ) );
hm2.insert ( Int_Pair ( i, i * i ) );
hm3.insert ( Int_Pair ( i, i - 1 ) );
hm4.insert ( Int_Pair ( i, i ) );
}
if ( hm1 <= hm2 )
cout << "The hash_map hm1 is less than or equal to the hash_map hm2." << endl;
else
cout << "The hash_map hm1 is greater than the hash_map hm2." << endl;
if ( hm1 <= hm3 )
cout << "The hash_map hm1 is less than or equal to the hash_map hm3." << endl;
else
cout << "The hash_map hm1 is greater than the hash_map hm3." << endl;
if ( hm1 <= hm4 )
cout << "The hash_map hm1 is less than or equal to the hash_map hm4." << endl;
else
cout << "The hash_map hm1 is greater than the hash_map hm4." << endl;
}
The hash_map hm1 is less than or equal to the hash_map hm2. The hash_map hm1 is greater than the hash_map hm3. The hash_map hm1 is less than or equal to the hash_map hm4.
Requirements
Header: <hash_map>
Namespace: stdext