Object & Array toString Method

You know I wrote this same function just 3 days ago. I did it a little differently. But you have a couple of booboos in there. Object names technically should be in quotes and you forgot to escape quotations marks in strings. Here, I fixed it for you
Plus it's nice to see people using recursion on PB.
~Wonder

function object2string(obj)
{
   var o = (!arguments[1]);
   var res = o? "{" : "[";
   var i = 0;
   for(var a in obj)
   {
      if(i > 0)
         res += ",";
      switch(obj.constructor)
      {
         case Array:
            res += (o? "\"" + a + "\":" : "") + object2string(obj, 1);
            break;
         case Object:
            res += (o? "\"" + a + "\":" : "") + object2string(obj);
            break;
         case String:
            res += (o? "\"" + a + "\":" : "") + '"' + obj.replace(/"/g,"\\\"") + '"';
            break;
         default:
            res += (o? "\"" + a + "\":" : "") + obj.toString();
            break;
      }
      i++;
   }
   res += o? "}" : "]";
   return res;
}

Object names don't have to be in quotes but it's good practice to put them in quotes, especially in a function like this.

If the object name has a : in it you'll run into problems. Ex:
good={"8:a":"good"};
bad={8:a:"bad"};

Also, all " (or ' if you use them) should be escaped in the object name if you're going to wrap the object names in quotes.
~Wonder