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App Inventor 2 列表的函数式编程 · App Inventor 2 中文网
...的柠檬水摊
第1步：过滤
第2步：映射
第3步：缩减
第 2 部分：鲍勃同学的身高
情况1：基本排序
情况2：使用比较器排序
情况3：用Key排序
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