export function getResConstruction(res=""){
  switch((res||"").constructor){
    case Array:
      return "["+getResConstruction(res[0]||"")+"]";
    case Object:
      return "{"+Object.keys(res).map(key=>{
        let value = getResConstruction(res[key]);
        return key+(value?":"+value:"")
      }).join(",")+"}"
    default:
      return ""; 
  }
}