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我循环 map，不能指定数据类型？那咋玩儿
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vcfvct Mar 5, 2020 via Android
类型应该可以 infer 吧，不用指定
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coolcoffee Mar 5, 2020
左侧类型是取决数组类型吧，提前声明好数组类型。或者在循环内部加一个临时变量去定义成自己想要的类型。
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