code: function _findEach(src, match, quotes, comments, callback) {
          var from = 0;
          var to;
          while (from < src.length) {
              to = _find(src, match, from, quotes, comments);
              if (to < 0) {
                  to = src.length;
              }
              callback(src.substr(from, to - from));
              from = to + 1;
          }
      }
docs: Callback iterator using `_find`