DART

map in dart

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

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]

map of a map in flutter

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}}}}

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); 
}