Printing lists with commas C++

Question

I know how to do this in other languages, but not C++, which I am forced to use here.

I have a Set of Strings that I\'m printing to out in a list, and they need a co

Answer 1

In python we just write:

print ", ".join(keywords)

so why not:

template
std::string
join(const S& sep, const V& v)
{
  std::ostringstream oss;
  if (!v.empty()) {
    typename V::const_iterator it = v.begin();
    oss << *it++;
    for (typename V::const_iterator e = v.end(); it != e; ++it)
      oss << sep << *it;
  }
  return oss.str();
}

and then just use it like:

cout << join(", ", keywords) << endl;

Unlike in the python example above where the " " is a string and the keywords has to be an iterable of strings, here in this C++ example the separator and keywords can be anything streamable, e.g.

cout << join('\n', keywords) << endl;