not_equal_to(3C++) - not_equal_to(3C++)
Standard C++ Library Copyright 1998, Rogue Wave Software, Inc.
NAMEnot_equal_to
- A binary function object that returns true if its first argument is
not equal to its second.
SYNOPSIS
#include <functional>
template <class T>
struct not_equal_to : public binary_function<T, T, bool>;
DESCRIPTIONnot_equal_to is a binary function object. Its operator() returns true
if x is not equal to y. You can pass a not_equal_to object to any algo‐
rithm that requires a binary function. For example, the transform algo‐
rithm applies a binary operation to corresponding values in two collec‐
tions and stores the result. not_equal_to would be used in that algo‐
rithm in the following manner:
vector<int> vec1;
vector<int> vec2;
vector<int> vecResult;
transform(vec1.begin(), vec1.end(),<br> vec2.begin(),<br>
vecResult.begin(), not_equal_to<int>());
After this call to transform, vecResult(n) contains a 1 if vec1(n) was not
equal to vec2(n) or a 0 if vec1(n) was equal to vec2(n).
INTERFACE
template <class T>
struct not_equal_to : binary_function<T, T, bool> {
bool operator() (const T&, const T&) const;
};
WARNINGS
If your compiler does not support default template parameters, then you
always need to supply the Allocator template argument. For instance,
you need to write:
vector<int, allocator<int> >
instead of:
vector<int>
If your compiler does not support namespaces, then you do not need the
using declaration for std.
SEE ALSO
binary_function, Function_Objects
Rogue Wave Software 02 Apr 1998 not_equal_to(3C++)
