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std::mismatch

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< cpp‎ | algorithm

 
 
Biblioteca algoritmo
Funções
Original:
Functions
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Não modificar operações de seqüência
Original:
Non-modifying sequence operations
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all_of
any_of
none_of
(C++11)
(C++11)
(C++11)
for_each
count
count_if
mismatch
equal
Modificando operações de seqüência
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Modifying sequence operations
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Particionamento operações
Original:
Partitioning operations
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Operações de classificação (em intervalos ordenados)
Original:
Sorting operations (on sorted ranges)
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Binários operações de busca (em intervalos ordenados)
Original:
Binary search operations (on sorted ranges)
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Definir operações (em intervalos ordenados)
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Set operations (on sorted ranges)
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Operações de pilha
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Heap operations
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Mínimo / máximo de operações
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Minimum/maximum operations
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Operações numéricas
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Numeric operations
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C biblioteca
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C library
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Defined in header <algorithm>
template< class InputIt1, class InputIt2 >

std::pair<InputIt1,InputIt2>
    mismatch( InputIt1 first1,
              InputIt1 last1,

              InputIt2 first2 );
(1)
template< class InputIt1, class InputIt2, class BinaryPredicate >

std::pair<InputIt1,InputIt2>
    mismatch( InputIt1 first1,
              InputIt1 last1,
              InputIt2 first2,

              BinaryPredicate p );
(2)
Retorna o par descasamento primeira de elementos de duas faixas: uma definida por [first1, last1) e outra a partir de first2. A primeira versão da função usa operator== para comparar os elementos, a segunda versão usa o predicado binário dado p.
Original:
Returns the first mismatching pair of elements from two ranges: one defined by [first1, last1) and another starting at first2. The first version of the function uses operator== to compare the elements, the second version uses the given binary predicate p.
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Índice

[editar] Parâmetros

first1, last1 -
o primeiro intervalo de elementos
Original:
the first range of the elements
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first2 -
o início da segunda gama de elementos
Original:
the beginning of the second range of the elements
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p - binary predicate which returns ​true if the elements should be treated as equal.

The signature of the predicate function should be equivalent to the following:

 bool pred(const Type1 &a, const Type2 &b);

The signature does not need to have const &, but the function must not modify the objects passed to it.
The types  Type1 and  Type2 must be such that objects of types InputIt1 and InputIt2 can be dereferenced and then implicitly converted to  Type1 and  Type2 respectively.

Type requirements
-
InputIt1 must meet the requirements of InputIterator.
-
InputIt2 must meet the requirements of InputIterator.
-
OutputIt must meet the requirements of OutputIterator.

[editar] Valor de retorno

std::pair com iteradores para os dois primeiros elementos não-equivalentes, ou, se não houver diferentes elementos encontrados, par com last1 eo iterator correspondente a partir da segunda faixa.
Original:
std::pair with iterators to the first two non-equivalent elements, or, if no different elements found, pair with last1 and the corresponding iterator from the second range.
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[editar] Complexidade

No máximo last1 - first1 aplicações do predicado
Original:
At most last1 - first1 applications of the predicate
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[editar] Possível implementação

First version
template<class InputIt1, class InputIt2>
std::pair<InputIt1, InputIt2>
    mismatch(InputIt1 first1, InputIt1 last1, InputIt2 first2)
{
    while (first1 != last1 && *first1 == *first2) {
        ++first1, ++first2;
    }
    return std::make_pair(first1, first2);
}
Second version
template<class InputIt1, class InputIt2, class BinaryPredicate>
std::pair<InputIt1, InputIt2>
    mismatch(InputIt1 first1, InputIt1 last1, InputIt2 first2, BinaryPredicate p)
{
    while (first1 != last1 && p(*first1, *first2)) {
        ++first1, ++first2;
    }
    return std::make_pair(first1, first2);
}

[editar] Exemplo

Este programa determina a substring mais longa do que é, simultaneamente, encontrado no início da string e no final do mesmo, em ordem inversa (possivelmente sobrepostas)
Original:
This program determines the the longest substring that is simultaneously found at the very beginning of the given string and at the very end of it, in reverse order (possibly overlapping)
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#include <iostream>
#include <string>
#include <algorithm>
 
std::string mirror_ends(const std::string& in)
{
    return std::string(in.begin(),
                       std::mismatch(in.begin(), in.end(), in.rbegin()).first);
}
 
int main()
{
    std::cout << mirror_ends("abXYZba") << '\n'
              << mirror_ends("abca") << '\n'
              << mirror_ends("aba") << '\n';
}

Output:

ab
a
aba

[editar] Veja também

determina se dois conjuntos de elementos são os mesmos
Original:
determines if two sets of elements are the same
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(modelo de função) [edit]
encontra o primeiro elemento satisfazer critérios específicos
Original:
finds the first element satisfying specific criteria
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(modelo de função) [edit]
retorna true se um intervalo é lexicograficamente menor do que outro
Original:
returns true if one range is lexicographically less than another
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(modelo de função) [edit]
searches for a range of elements
(modelo de função) [edit]