“Karte in Dart” Code-Antworten

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

Karte einer Karte in Flattern

Map someThing = {
    "someThing2":{
      'key1': 'val1',
      'key2': 'val2',
      'key3': {},
    }
  };
// {someThing2: {key1: val1, key2: val2, key3: {}}}
someThing['someThing2']['key3'] = {
    'someThing3': {
          'key4': 'val4',
        },
  };
// {someThing2: {key1: val1, key2: val2, key3: {someThing3: {key4: val4}}}}
MonkeySeeMonkeyDo

Dartkarte

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

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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