Java
Set:Uniqueness Without Scanning the List
Use Set when uniqueness is the job — equals-based membership, no indexes, and why List.contains is the wrong uniqueness type.
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Use Set when uniqueness is the job — equals-based membership, no indexes, and why List.contains is the wrong uniqueness type.
Read MoreThe set ADT is unique membership. HashSet delivers it with a hash table; List.contains is a scan. When TreeSet belongs instead, and what you lose (order).
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