DartDataTableExp1

DartDataTableExp1.dart

void main() {
  // DartDataTableExp1
  // https://gist.github.com/JoeCodeswell/34f5fca2d4e3df65155189b3be033da3
  // https://dartpad.dev/34f5fca2d4e3df65155189b3be033da3
  JoesDataList jdl = JoesDataList();
  
  print(jdl.listOfDataItems[0].name); // Sarah
  print(' ');
  // jdl.Map(); // The method 'Map' isn't defined for the type 'JoesDataList' - line 4
  
  List<Avengers> avengers = Avengers.getAvengers();
  
  // No toList()
  var rowsColon = avengers.map(
     (avenger) => [avenger.name, avenger.weapon]
  );
  print(rowsColon.runtimeType); // MappedListIterable<Avengers, List<String>>
  print(' ');
  print(rowsColon);
  // ([Captain America, Shield], [Thor, Mjolnir], [Spiderman, Web Shooters], [Doctor Strange , Eye Of Agamotto])
  print(' ');

  
  // print(rowsColon.forEach( (itm) =>  { 'name': itm[0], 'weapon': itm[1] } )  ); 
  // `forEach` This expression has a type of 'void' so its value can't be used 
 
  
  
  rowsColon.forEach( (itm) => print( { 'name': itm[0], 'weapon': itm[1] } ) ); 
  /*
  {name: Captain America, weapon: Shield}
  {name: Thor, weapon: Mjolnir}
  {name: Spiderman, weapon: Web Shooters}
  {name: Doctor Strange , weapon: Eye Of Agamotto}
  */
  print(' ');

  rowsColon.forEach( (itm) => print([itm[0], itm[1]]) ); 
  /*
  [Captain America, Shield]
  [Thor, Mjolnir]
  [Spiderman, Web Shooters]
  [Doctor Strange , Eye Of Agamotto]  
  */
  print(' ');

  
  // with toList()
  var rowsColon0 = avengers.map(
     (avenger) => [avenger.name, avenger.weapon]
  ).toList();
  print(rowsColon0.runtimeType); // JSArray<List<String>>
  print(' ');
  print(rowsColon0); 
  // [[Captain America, Shield], [Thor, Mjolnir], [Spiderman, Web Shooters], [Doctor Strange , Eye Of Agamotto]]
  print(' ');
  
  print(rowsColon0[0][0]); // Captain America
  print(rowsColon0[0][1]); // Shield
  print(' ');
  
  print(rowsColon0[1][0]); // Thor
  print(rowsColon0[1][1]); // Mjolnir
  print(' ');
    
}

class Avengers {
  String name; 
  String weapon;
  Avengers({this.name, this.weapon});

  static List<Avengers> getAvengers() { 
    return <Avengers>[
      Avengers (name: "Captain America", weapon: "Shield"), 
      Avengers (name: "Thor", weapon: "Mjolnir"), 
      Avengers (name: "Spiderman", weapon: "Web Shooters"),
      Avengers (name: "Doctor Strange ", weapon: "Eye Of Agamotto"), 
    ]; // <Avengers>[]
  }
}


class JdataItem{
  String name;
  int age;
  String title;

  JdataItem(this.name,this.age,this.title);
}
class JoesDataList{
  List<JdataItem> listOfDataItems = [
    JdataItem('Sarah', 19, 'Student',),
    JdataItem('Janine', 43, 'Professor',),
    JdataItem('William', 27, 'Associate Professor',),
    JdataItem('Frances', 37, 'Student',),
    JdataItem('Maxine', 21, 'Student',),
  ];

}