[julia-users] strategy design pattern

[Igor Cerovsky]

Hi,

By exploring Julia I'm curios what would be a best way to implement 
strategy design pattern in Julia. I'm posting a C++ example, for which I 
would like to write equivalent in Julia.
Thanks.

#include <functional>
#include <iostream>
#include <vector>

template<typename T>
void foo_t(const T& t)
{
  std::cout << "I'm using foo_t... \n";
  for (auto a : t)  std::cout << a << '\n';
}

template<typename T>
void bar_t(const T& t)
{
  std::cout << "I'm usimg bar_t... \n";
  for (auto a : t)  std::cout << a+10 << '\n';
}

template<typename T>
class alg_t
{
public:
  template<typename F>
  explicit alg_t(F strategy) : strategy(std::move(strategy)) { }

  void run(const T& t) { strategy(t); }

private:
  std::function<void(const T&)> strategy;
};

int main()
{
  using VcD = std::vector<double>;
  VcD vec{1., 2., 3.};

  alg_t<VcD> alg_foo(foo_t<VcD>);
  alg_foo.run(vec);

  alg_t<VcD> alg_bar(bar_t<VcD>);
  alg_bar.run(vec);

  return 0;
}