sqljocky dont save the data in list

Question

  import 'package:sqljocky/sqljocky.dart';

  void recopilaDatos(){

    List <String> listaCorreos = new List(); 
    var pool = new ConnectionPool(host: 'localhost', port: 3306, user: 'root', password: 'root', db: 'prueba', max: 5);
    // Realizar una query.
    pool.query('select * from usuarios').then( (result) {
      result.forEach(      
        (row)   {listaCorreos.add("user: ${row[0]}"); /*don't work*/}   
      );

    });
    //listaCorreos.add("manolo"); //OK
    print (listaCorreos.length);
    for (var nombre in listaCorreos){
      print(nombre);
    }
  }

  void main() {
    recopilaDatos();
  }

Answer 1

You printing the list before its populated, this is why the manolo entry works and the print in the then clause works also, you can only be sure the list is set up in your then clause, not outside of it.