如何Map以声明方式获取a的值?
如果地图的内容是 -
Key "Apple" - Value "3"
Key "Banana" - Value "4"
Key "Orange" - Value "8"
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我不想得到 -
Key "Banana" - Value "4"
Key "Apple" - Value "3"
Key "Orange" - Value "8"
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如何迭代并获取声明的订单?