首先不用怀疑你这个错误就是你在map循环的时候没有加key导致的。
然后加上就可以了（个人建议字段中有标识字段优先用，实在没有再去用index索引)
当然，如果你的map中有if判断那么不要忘了给其他的return中也要加上 key, 不过如果没有返回任何值的话也可以不写else
我有强迫症 不写检测在终端会警告
就有点难受
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