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std::unordered_multiset::begin, std::unordered_multiset::cbegin

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< cpp‎ | container‎ | unordered multiset
Revision as of 09:21, 2 November 2012 by P12bot (Talk | contribs)

 
 
 
 
iterator begin();
(since C++11)
const_iterator begin() const;
(since C++11)
const_iterator cbegin() const;
(since C++11)

Returns an iterator to the first element of the container.

If the container is empty, the returned iterator will be equal to end().

range-begin-end.svg

Contents

Parameters

(none)

Return value

Iterator to the first element

Exceptions

noexcept specification:  
noexcept
  

Complexity

Constant

Example

#include <iostream>
#include <iterator>
#include <string>
#include <unordered_set>
 
int main() {
    const std::unordered_multiset<std::string> words = {
        "some", "words", "to", "count",
        "count", "these", "words"
    };
 
    for(auto it = words.begin(); it != words.end(); )
    {
        auto cnt = words.count(*it);
        std::cout << *it << ":\t" << cnt << '\n';
        std::advance(it, cnt); // all cnt elements have equivalent keys
    }
}

Possible output:

some:   1
words:  2
to:     1
count:  2
these:  1

See also

returns an iterator to the end
(public member function) [edit]