Function join

simcore/framework/src/cli/cli.hpp:186–195

/// Simple function to join a string
template <typename T>
std::string join(const T &v, std::string delim = ",") {
  std::ostringstream s;
  auto beg = std::begin(v);
  auto end = std::end(v);
  if (beg != end) s << *beg++;
  while (beg != end) {
    s << delim << *beg++;
  }
  return s.str();
}

/// Simple function to join a string from processed elements
template <typename T, typename Callable,