Re: NSIndexSet
Re: NSIndexSet
- Subject: Re: NSIndexSet
- From: Jon Hull <email@hidden>
- Date: Sat, 29 Nov 2003 19:32:59 -0800
On Nov 29, 2003, at 6:30 PM, Matthew Johnson wrote:
>
I am implementing a category on NSIndexSet that includes a method -
>
(BOOL)intersectsIndexes:(NSIndexSet *)indexSet. The implementation of
>
this will have to loop through one of the index sets and check for
>
intersection using containsIndex and intersectsIndexesInRange. I am
>
wondering whether it would generally be quicker to loop through the
>
smaller index set or perform the intersection tests on the smaller
>
index set. Opinions?
Why not just use the methods firstIndex and lastIndex on the both sets
then use the larger firstIndex and smaller lastIndex to make an
NSRange, then return intersectsIndexesInRange?
Thanks,
Jon
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| References: | |
| | >NSIndexSet (From: Matthew Johnson <email@hidden>) |