On Tue, Oct 06, 2015 at 08:28:46PM +0000, Borislav Kosharov via Digitalmars-d-learn wrote: > JSONValue root = parseJSON(text); > if(root["key"].isNull == false) { try if("key" in root) { // it is there } else { // it is not there } you can also do if("key" !in root) {}