lessTrickyToString.js

// Parameter Object opts instead of withQuot and withComma
function trickyToString(data, opts) {
   //trickyToString become a Template method
   // quot and comma flag become Strategy of trickyToString method
   var quotFunc = opts.withQuot || function(s){ return s; };
   var commaFunc = opts.withComma || function(){ return ","; };
   var outStr = "";
   for( key in data ) {
     outStr = outStr + quotFunc(key) + commaFunc() + quotFunc(data[key]) + "\n";
   }
   
   return outStr;
}