Dart/Flutter Liste Methodlar

final numbers = <int>[1, 2, 3];numbers.add(4);print(numbers); // [1, 2, 3, 4]

final numbers = <int>[1, 2, 3];numbers.addAll([4, 5, 6]);print(numbers); // [1, 2, 3, 4, 5, 6]

final numbers = <int>[1, 2, 3, 5, 6, 7];var result = numbers.any((element) => element >= 5); // true;result = numbers.any((element) => element >= 10); // false;

var words = <String>['fee', 'fi', 'fo', 'fum'];var map = words.asMap(); print(map);// {0: fee, 1: fi, 2: fo, 3: fum}map.keys.toList(); print(map.keys.toList());// [0, 1, 2, 3]print(map.values.toList());// [fee, fi, fo, fum]

  var foo = [1, 2.3];   print(foo.runtimeType); // JSArray<num>  var baz = foo.cast<num>();  print(baz.runtimeType); // CastList<num, num>  print(baz == foo); // false

final numbers = <int>[1, 2, 3];numbers.clear();print(numbers.length); // 0print(numbers); // []

final gasPlanets = <int, String>{1: 'Jupiter', 2: 'Saturn'};final containsOne = gasPlanets.keys.contains(1); // truefinal containsFive = gasPlanets.keys.contains(5); // falsefinal containsJupiter = gasPlanets.values.contains('Jupiter'); // truefinal containsMercury = gasPlanets.values.contains('Mercury'); // false

final numbers = <int>[1, 2, 3, 5, 6, 7];final elementAt = numbers.elementAt(4); // 6

final planetsByMass = <double, String>{0.06: 'Mercury', 0.81: 'Venus',  0.11: 'Mars'};// Checks whether all keys are smaller than 1.final every = planetsByMass.keys.every((key) => key < 1.0); // true

Iterable<int> count(int n) sync* {  for (var i = 1; i <= n; i++) {    yield i;   } }var numbers = [1, 3, 0, 2];print(numbers.expand(count)); // (1, 1, 2, 3, 1, 2)

final numbers = <int>[1, 2, 3, 5, 6, 7];var result = numbers.firstWhere((element) => element < 5); // 1result = numbers.firstWhere((element) => element > 5); // 6result =    numbers.firstWhere((element) => element > 10, orElse: () => -1); // -1

var value = initialValue;for (E element in this) {  value = combine(value, element);}return value;

final numbers = <double>[10, 2, 5, 0.5];const initialValue = 100.0;final result = numbers.fold<double>(    initialValue, (previousValue, element) => previousValue + element);print(result); // 117.5

var planets = <String>['Earth', 'Jupiter'];var updated = planets.followedBy(['Mars', 'Venus']);print(updated); // (Earth, Jupiter, Mars, Venus)

final numbers = <int>[1, 2, 6, 7];numbers.forEach(print);// 1// 2// 6// 7

final planetsByMass = <double, String>{0.06: 'Mercury', 0.81: 'Venus',  0.11: 'Mars'};final joinedNames = planetsByMass.values.join('-'); // Mercury-Venus-Mars

final numbers = <int>[1, 2, 3, 5, 6, 7];var result = numbers.lastWhere((element) => element < 5); // 3result = numbers.lastWhere((element) => element > 5); // 7result = numbers.lastWhere((element) => element > 10,    orElse: () => -1); // -1

var products = jsonDecode('''[  {"name": "Screwdriver", "price": 42.00},  {"name": "Wingnut", "price": 0.50}]''');var values = products.map((product) => product['price'] as double);var totalPrice = values.fold(0.0, (a, b) => a + b); // 42.5.