Note
Access to this page requires authorization. You can try signing in or changing directories.
Access to this page requires authorization. You can try changing directories.
The latest version of this topic can be found at <hash_map> operators.
operator!=](#operator_neq)|operator!= (hash_map)|operator==|
|operator== (hash_map)|
operator!= (hash_map)
Note
This API is obsolete. The alternative is unordered_map Class.
Tests if the hash_map object on the left side of the operator is not 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_maps are not equal; false if hash_maps are equal.
Remarks
The comparison between hash_map objects is based on a pairwise comparison of their elements. Two hash_maps are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
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_ne.cpp
// compile with: /EHsc
#include <hash_map>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_map <int, int> hm1, hm2, hm3;
int i;
typedef pair <int, int> Int_Pair;
for ( i = 0 ; i < 3 ; i++ )
{
hm1.insert ( Int_Pair ( i, i ) );
hm2.insert ( Int_Pair ( i, i * i ) );
hm3.insert ( Int_Pair ( i, i ) );
}
if ( hm1 != hm2 )
cout << "The hash_maps hm1 and hm2 are not equal." << endl;
else
cout << "The hash_maps hm1 and hm2 are equal." << endl;
if ( hm1 != hm3 )
cout << "The hash_maps hm1 and hm3 are not equal." << endl;
else
cout << "The hash_maps hm1 and hm3 are equal." << endl;
}
The hash_maps hm1 and hm2 are not equal.
The hash_maps hm1 and hm3 are equal.
operator== (hash_map)
Note
This API is obsolete. The alternative is unordered_map Class.
Tests if the hash_map object on the left side of the operator is 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 equal to the hash_map on the right side of the operator; otherwise false.
Remarks
The comparison between hash_map objects is based on a pairwise comparison of their elements. Two hash_maps are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
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_eq.cpp
// compile with: /EHsc
#include <hash_map>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_map <int, int> hm1, hm2, hm3;
int i;
typedef pair <int, int> Int_Pair;
for ( i = 0 ; i < 3 ; i++ )
{
hm1.insert ( Int_Pair ( i, i ) );
hm2.insert ( Int_Pair ( i, i * i ) );
hm3.insert ( Int_Pair ( i, i ) );
}
if ( hm1 == hm2 )
cout << "The hash_maps hm1 and hm2 are equal." << endl;
else
cout << "The hash_maps hm1 and hm2 are not equal." << endl;
if ( hm1 == hm3 )
cout << "The hash_maps hm1 and hm3 are equal." << endl;
else
cout << "The hash_maps hm1 and hm3 are not equal." << endl;
}
The hash_maps hm1 and hm2 are not equal.
The hash_maps hm1 and hm3 are equal.
operator!=
Note
This API is obsolete. The alternative is unordered_multimap Class.
Tests if the hash_multimap object on the left side of the operator is not equal to the hash_multimap object on the right side.
bool operator!=(const hash_multimap <Key, Type, Traits, Allocator>& left, const hash_multimap <Key, Type, Traits, Allocator>& right);
Parameters
left
An object of type hash_multimap.
right
An object of type hash_multimap.
Return Value
true if the hash_multimaps are not equal; false if hash_multimaps are equal.
Remarks
The comparison between hash_multimap objects is based on a pairwise comparison of their elements. Two hash_multimaps are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
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_multimap_op_ne.cpp
// compile with: /EHsc
#include <hash_map>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_multimap <int, int> hm1, hm2, hm3;
int i;
typedef pair <int, int> Int_Pair;
for ( i = 0 ; i < 3 ; i++ )
{
hm1.insert ( Int_Pair ( i, i ) );
hm2.insert ( Int_Pair ( i, i * i ) );
hm3.insert ( Int_Pair ( i, i ) );
}
if ( hm1 != hm2 )
cout << "The hash_multimaps hm1 and hm2 are not equal." << endl;
else
cout << "The hash_multimaps hm1 and hm2 are equal." << endl;
if ( hm1 != hm3 )
cout << "The hash_multimaps hm1 and hm3 are not equal." << endl;
else
cout << "The hash_multimaps hm1 and hm3 are equal." << endl;
}
The hash_multimaps hm1 and hm2 are not equal.
The hash_multimaps hm1 and hm3 are equal.
operator==
Note
This API is obsolete. The alternative is unordered_multimap Class.
Tests if the hash_multimap object on the left side of the operator is equal to the hash_multimap object on the right side.
bool operator==(const hash_multimap <Key, Type, Traits, Allocator>& left, const hash_multimap <Key, Type, Traits, Allocator>& right);
Parameters
left
An object of type hash_multimap.
right
An object of type hash_multimap.
Return Value
true if the hash_multimap on the left side of the operator is equal to the hash_multimap on the right side of the operator; otherwise false.
Remarks
The comparison between hash_multimap objects is based on a pairwise comparison of their elements. Two hash_multimaps are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
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_multimap_op_eq.cpp
// compile with: /EHsc
#include <hash_map>
#include <iostream>
int main( )
{
using namespace std;
using namespace stdext;
hash_multimap<int, int> hm1, hm2, hm3;
int i;
typedef pair<int, int> Int_Pair;
for (i = 0; i < 3; i++)
{
hm1.insert(Int_Pair(i, i));
hm2.insert(Int_Pair(i, i*i));
hm3.insert(Int_Pair(i, i));
}
if ( hm1 == hm2 )
cout << "The hash_multimaps hm1 and hm2 are equal." << endl;
else
cout << "The hash_multimaps hm1 and hm2 are not equal." << endl;
if ( hm1 == hm3 )
cout << "The hash_multimaps hm1 and hm3 are equal." << endl;
else
cout << "The hash_multimaps hm1 and hm3 are not equal." << endl;
}
The hash_multimaps hm1 and hm2 are not equal.
The hash_multimaps hm1 and hm3 are equal.