UTF 8 in Dart, Encoding, JSON, STDIN - nexssp/language_dart GitHub Wiki
Example from Nexss Programmer 2.0
Json, Stdin, utf-8
import 'dart:io';
import 'dart:convert';
void main() {
var NexssStdin = stdin.readLineSync(encoding: Encoding.getByName('utf-8'));
var NexssStdout = jsonDecode(NexssStdin);
NexssStdout['HelloFromDart'] = Platform.version;
print(jsonEncode(NexssStdout));
}