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📜  在 hashmap 中是否重复键 - TypeScript 代码示例

📅  最后修改于: 2022-03-11 14:48:30.988000             🧑  作者: Mango

代码示例1
HashMap does not allow duplicate keys however it allows to have duplicate values. HashSet permits to have a single null value. HashMap permits single null key and any number of null values.