Ref: http://blog.hubert.tw/2012/09/06/filter-is-good/

filter.cpp

// $ g++ -std=c++0x filter.cpp
#include <iterator>
#include <algorithm>

template <class Sequence, class Predicate>
Sequence filter(const Sequence& seq, Predicate pred)
{
  Sequence result;
  std::copy_if(begin(seq), end(seq), back_inserter(result), pred);
  return result;
}

#include <string>
#include <list>

using namespace std;

int main()
{
  list<string> l = {"Hello ", "", "world"};

  l = filter(l, [](const string& s) { return !s.empty(); });
  return 0;
}