By default no_copy is false (0). If passed as true (non-zero integer)
      then the element to return is the original content of the array and the place
      in the array from which the element came gets set to 0.
This must in some cases  be true, for example when the data being retrieved is
not copiable, as in the case of a string output.  While the default behavior is to
return a copy of the element get_keyword will return the element itself and then
set the place from which the element was retrieved to 0 if this argument is true.
