ex10_09.cpp

//!
//! @author @Yue Wang @shbling @pezy @zzzkl @Yue Wang
//! @date   01.12.2014  Jun 2015
//!
//! Exercise 10.9:
//! Implement your own version of elimDups. Test your program by printing
//! the vector after you read the input, after the call to unique, and after
//! the call to erase.
//!

#include <iostream>
#include <string>
#include <vector>
#include <algorithm>

// print containers like vector,deque, list, etc.
template <typename Sequence> auto println(Sequence const& seq) -> std::ostream &
{
    for (auto const& elem : seq) std::cout << elem << " ";
    return std::cout << std::endl;
}

auto eliminate_duplicates(std::vector<std::string>& vs)
    -> std::vector<std::string> &
{
    std::sort(vs.begin(), vs.end());
    println(vs);

    auto new_end = std::unique(vs.begin(), vs.end());
    println(vs);

    vs.erase(new_end, vs.end());
    return vs;
}

int main()
{
    std::vector<std::string> vs{"a", "v", "a", "s", "v", "a", "a"};
    println(vs);
    println(eliminate_duplicates(vs));

    return 0;
}