List (Mảng) trong Dart

// List literal
var numbers = [1, 2, 3, 4, 5];
var fruits = ["Apple", "Banana", "Orange"];
 
// Empty list
var emptyList = <int>[];
var anotherList = List<String>.empty(growable: true);
 
// Fixed length
var fixedList = List<int>.filled(5, 0);  // [0, 0, 0, 0, 0]

var fruits = ["Apple", "Banana", "Orange"];
 
print(fruits[0]);      // Apple
print(fruits.first);   // Apple
print(fruits.last);    // Orange
print(fruits.length);  // 3

var numbers = [1, 2, 3];
 
numbers.add(4);              // [1, 2, 3, 4]
numbers.addAll([5, 6]);      // [1, 2, 3, 4, 5, 6]
numbers.insert(0, 0);        // [0, 1, 2, 3, 4, 5, 6]

var numbers = [1, 2, 3, 4, 5];
 
numbers.remove(3);           // [1, 2, 4, 5]
numbers.removeAt(0);         // [2, 4, 5]
numbers.removeLast();        // [2, 4]
numbers.clear();             // []

var fruits = ["Apple", "Banana", "Orange"];
 
// For-in
for (var fruit in fruits) {
  print(fruit);
}
 
// forEach
fruits.forEach((fruit) => print(fruit));
 
// For loop với index
for (var i = 0; i < fruits.length; i++) {
  print("$i: ${fruits[i]}");
}

var numbers = [1, 2, 3, 4, 5];
 
// Map
var doubled = numbers.map((n) => n * 2).toList();  // [2, 4, 6, 8, 10]
 
// Where (filter)
var evens = numbers.where((n) => n % 2 == 0).toList();  // [2, 4]
 
// Reduce
var sum = numbers.reduce((a, b) => a + b);  // 15
 
// Contains
print(numbers.contains(3));  // true
 
// IndexOf
print(numbers.indexOf(3));   // 2

var list1 = [1, 2, 3];
var list2 = [4, 5, 6];
var combined = [...list1, ...list2];  // [1, 2, 3, 4, 5, 6]
 
// Conditional spread
var includeZero = true;
var numbers = [
  if (includeZero) 0,
  1,
  2,
  3
];

var squares = [for (var i in [1, 2, 3, 4]) i * i];  // [1, 4, 9, 16]