main.dart

void main(){
  /// 1. forEach
  var perusahaan = ['bukalapak', 'tokopedia', 'blibli', 'salestock'];
  perusahaan.forEach((data)=> print(data)); /// bukalapak tokopedia blibli salestock
  
  ///2
  var perusahan_id = perusahaan.map((data)=> '${data} indonesia').toList();
  print(perusahan_id);
  
  ///3 
  //var perusahaan = ['bukalapak', 'tokopedia', 'blibli', 'salestock'];
  print(perusahaan.contains('bukalapak'));
  
  ///4
  var randomdata = [1,3,5,20,4,2];
  randomdata.sort((a, b)=> a.compareTo(b));
  print(randomdata);
  
  ///5
  var sumData = randomdata.reduce((cur, next)=> cur + next); /// 1 + 2 + 3 + ... 
  print(sumData); /// 35
  
  const currentValue = 10;
  var nextSum = randomdata.fold(currentValue, (cur, next)=> cur + next);
  print(nextSum); // 45
  
  ///6
  List<Map<String, dynamic>> listUser = [
    {'nama': 'bekasi', 'umur': 240},
    {'nama': 'boyolali', 'umur': 200},
    {'nama': 'jakarta', 'umur': 100},
   
  ];
  var example = listUser.every((data) => data['umur'] >= 100);
  print(example);
  
  ///7
  var userYoung = listUser.where((data)=> data['umur'] > 100);
  print(userYoung);
  
  var userFirstYoung = listUser.firstWhere((data)=> data['umur'] < 200);
  print(userFirstYoung);
  
  var userSingle = listUser.singleWhere((data)=> data['umur'] <= 100);
  print(userSingle);
  
  ///8
  var dataTestCase = [1, 2, 3, 4, 10, 90];
  print(dataTestCase.take(2));
  print(dataTestCase.skip(2));
  
  //9
  var pairs = [[1, 2], ['a', 'b'], [3, 4]];
  var flatmaps = pairs.expand((pair)=> pair);
  print(flatmaps);
  
  //10
  var comph = [1,2,3,4];
  var newCom = [for(var a in comph) 'new ${a}'];
  print(newCom);
}