“Dartkarte” Code-Antworten

Flatternkarte dynamisch

  Map<String, dynamic> var = {'item': 0, 'name': 'John'}  
Long Lizard

Flattern erstellen neue Karte

Map<String, int> map1 = {'zero': 0, 'one': 1, 'two': 2};
Map map2 = {'zero': 0, 'I': 'one', 10: 'X'};
var map3 = {'zero': 0, 'I': 'one', 10: 'X'};
Dangerous Deer

Karte in Dart

void main() { 
   var details = new Map(); 
   details['Usrname'] = 'admin'; 
   details['Password'] = 'admin@123'; 
   print(details); 
} 

// Output
// {Usrname: admin, Password: admin@123}
Impossible Iguana

Dartkarte

void main() { 
   var details = new Map(); 
   details['Usrname'] = 'admin'; 
   details['Password'] = 'admin@123'; 
   print(details); 
} 
Enthusiastic Elephant

DART ASYNC MAP

The expression (i) async => await foo(i) still returns a future. You can use Future.wait(mappedList) to wait till all created futures are completed.
Santino

Dartkarte wo

import 'package:collection/collection.dart';
...
Map<int, String> a = {1: "a", 2: "b", 3: "c", 4: "d", 5: "e", 6: "f"};

final b = Map.fromEntries(
    a.entries.map((entry) =>
        entry.key % 2 == 0 ? MapEntry(entry.key * 10, entry.value) : null)
    .whereNotNull()
);

print(b.keys.toList()); // prints [20, 40, 60]
Wicked Wildebeest

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