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