Dart vs Kotlin: maps

maps.dart

import 'package:collection/collection.dart';

void main() {
  // Mutable map
  final mutableMap = {
    1: "One",
    2: "Two",
    3: "Three",
  };
  mutableMap[1] = "1";
  mutableMap.putIfAbsent(0, () => "Zero");
  final element = mutableMap[0];
  // Empty map
  final emptyMap = <int, String>{};
  // Immutable map (copy of the original)
  final immutableMap = Map.unmodifiable({1: 1, 2: 2});
  // Immutable map view (wrap of the original)
  final immutableMapView = UnmodifiableMapView(mutableMap);
  // Equality
  print({1: 1} == {1: 1}); // false
  print(MapEquality().equals({1: 1}, {1: 1})); // true
  // Creating a map from list
  final map = Map.fromIterable([1, 2]); // {1:1, 2:2}
}

maps.kt

fun main() {
    // Mutable map
    val mutableMap = mutableMapOf(
        1 to "One",
        2 to "Two",
        3 to "Three",
    )
    mutableMap[1] = "1"
    mutableMap.getOrPut(0) { "Zero" }
    val element = mutableMap[0]
    // Empty map
    val emptyMap = emptyMap<Int, String>()
    // Immutable map (copy of the original)
    val immutableMap = mapOf(1 to 1, 2 to 2)
    // Immutable map view (wrap of the original)
    val immutableMapView = mutableMap as Map<Int, String>
    // Equality
    print(mapOf(1 to 1) == mapOf(1 to 1)) // true
    // Creating a map from list
    val map = listOf(1, 2).associateBy { it } // {1:1, 2:2}
}