Thrust

## ◆ equal() [2/4]

template<typename InputIterator1 , typename InputIterator2 >
 bool thrust::equal ( InputIterator1 first1, InputIterator1 last1, InputIterator2 first2 )

equal returns true if the two ranges [first1, last1) and [first2, first2 + (last1 - first1)) are identical when compared element-by-element, and otherwise returns false.

This version of equal returns true if and only if for every iterator i in [first1, last1), *i == *(first2 + (i - first1)).

Parameters
 first1 The beginning of the first sequence. last1 The end of the first sequence. first2 The beginning of the second sequence.
Returns
true, if the sequences are equal; false, otherwise.
Template Parameters
 InputIterator1 is a model of Input Iterator, and InputIterator1's value_type is a model of Equality Comparable, and InputIterator1's value_type can be compared for equality with InputIterator2's value_type. InputIterator2 is a model of Input Iterator, and InputIterator2's value_type is a model of Equality Comparable, and InputIterator2's value_type can be compared for equality with InputIterator1's value_type.

The following code snippet demonstrates how to use equal to test two ranges for equality.

#include <thrust/equal.h>
...
int A1[7] = {3, 1, 4, 1, 5, 9, 3};
int A2[7] = {3, 1, 4, 2, 8, 5, 7};
...
bool result = thrust::equal(A1, A1 + 7, A2);
// result == false