<hash_map> operators
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This API is obsolete.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This API is obsolete.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.