ChaiScript/unittests/ranged_for_2.chai

def keys(map)
{ 
  auto v = Vector();                // create empty vector
  for( i : map )
  {
    v.push_back(i.first);    // append key to the vector
  }
  v;                              // return the new vector
} 
print(keys(["1a":111, "2b":222]));