How can I use switch case statements that creates variables/constants that are valid outside of the switch-case statement. If there is no way to do that, what else can I do to achieve the same effect i.e. creating variables subject to a condition, and make it accessible in "global" or higher scope?How can I use switch case statements that creat
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如何在Swift中增加switch-case /循环中的变量范围？
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