使用.fold()方法对列表进行求和时会出现错误:int sumList = listInt.fold(0, (p, c) => p + c);
print(sumList);
print(listInt.fold(0, (p, c) => p + c));
打印sumList是非常好的,但是当我打印相同的操作时,我会得到一个编译错误</
USER_NOT_FOUND"; }但是,如果找不到用户,这只会返回用户或字符串,而不会刹车:(不工作) System.out.pring("This will run always"); System.out.pring("this should only run if auser was returned");
System.out.p