removeSafeAt method
删除指定元素
Implementation
T? removeSafeAt(int index) {
if (isNullOrEmpty) return null;
if (index < 0 || index >= this!.length) return null;
return this!.removeAt(index);
}
删除指定元素
T? removeSafeAt(int index) {
if (isNullOrEmpty) return null;
if (index < 0 || index >= this!.length) return null;
return this!.removeAt(index);
}