toList 方法
- {bool growable = true}
override
元素按迭代顺序排列。如果 growable
为 false,则列表是固定长度的。
示例
final planets = <int, String>{1: 'Mercury', 2: 'Venus', 3: 'Mars'};
final keysList = planets.keys.toList(growable: false); // [1, 2, 3]
final valuesList =
planets.values.toList(growable: false); // [Mercury, Venus, Mars]
实现
List<E> toList({bool growable = true}) {
if (this.isEmpty) return List<E>.empty(growable: growable);
var first = this[0];
var result = List<E>.filled(this.length, first, growable: growable);
for (int i = 1; i < this.length; i++) {
result[i] = this[i];
}
return result;
}