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Home/ Questions/Q 9111671
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Editorial Team
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Editorial Team
Asked: June 17, 20262026-06-17T03:33:41+00:00 2026-06-17T03:33:41+00:00

I need an efficient data structure to hold onto identifiers without the need for

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I need an efficient data structure to hold onto identifiers without the need for a value in the dictionary. Would it work to hold just an NSNull as the value for each key or is there a more efficient data structure for fast lookup of keys?

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  1. Editorial Team
    Editorial Team
    2026-06-17T03:33:42+00:00Added an answer on June 17, 2026 at 3:33 am

    See NSSet or NSMutableSet, it is essentially an NSDictionary without values.

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