问题描述
如何在dart中创建嵌套列表的副本?在此代码中,我对副本所做的更改也被更改为原始
List board = [[0,0],[0,0]];
List boardcopy = List.from(board); // create copy of the board
boardcopy[0][0] = 1; // change copy
print(board); // print original board
OUTPUT:
[[1,0]] <-- it has changed the original board!!!
解决方法
我知道了:
List boardCopy = board.map((element) => List.from(element)).toList();