chain.cpp

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

using namespace std;

template <class T>
class Array : public vector<T> {
  public:
    Array() : vector<T>() {}
    Array(int size) : vector<T>(size) {}

    Array* sort()
    {
      std::sort(this->begin(), this->end());
      return this;
    }

    Array* shuffle()
    {
      random_shuffle(this->begin(), this->end());
      return this;
    }

    Array* uniq()
    {
      erase(unique(this->begin(), this->end()), this->end());
      return this;
    }

    Array* push(const T& value)
    {
      push_back(value);
      return this;
    }

/*  Not working around Array<T>::const_iterator
    Array* inspect()
    {
        Array<T>::const_iterator it;

        cout << '[';
        for (it = this->begin(); it != this->end() - 1; it++) {
          cout << *it << ", ";
        }
        cout << *it << ']' << endl;

       return this;
    } */
};

void show(const Array<int>* list)
{
  Array<int>::const_iterator it = list->begin();
  cout << '[';
  for (; it != list->end() - 1; it++) {
    cout << *it << ", ";
  }
  cout << *it << ']' << endl;
}

int main(int argc, char *argv)
{
  Array<int>* list = new Array<int>;

  for (int i = 0; i < 10; i++) {
    list->push_back(i + 1);
  }
  show(list);
  show(list->shuffle());
  show(list->push(3)->push(5)->push(3)->sort()->uniq());

  delete list;

  return 0;
}