DART

map in dart

void main() { 
   var details = {'Usrname':'tom','Password':'pass@123'}; 
   details['Uid'] = 'U1oo1'; 
   print(details); 
}

flutter map key/value

void main() {
  final testMap = {"a": 1, "b": 2, "c": 3, "d": 4, "e": 5};
  for (final mapEntry in testMap.entries) {
    final key = mapEntry.key;
    final value = mapEntry.value;
    print('Key: $key, Value: $value');  // Key: a, Value: 1 ...
  }
}

Map in dart

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

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

map in dart

void main() {  
  Map person={'name':'Bijay Poudel',"age":20};
  //name and age are key and Bijay and 20 are value
  print(person);

}

dart map

void main() { 
   var details = {'Usrname':'tom','Password':'pass@123'}; 
   details['Uid'] = 'U1oo1'; 
   print(details); 
} 

dart map

{Usrname: tom, Password: pass@123, Uid: U1oo1}

dart map where

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]

dart map

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

dart map what is

Dart Map is an object that stores data in the form of a key-value pair. 

what is map in dart

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

dart map values

void main() { 
   var details = {'Usrname':'tom','Password':'pass@123'}; 
   print(details.values); 
}