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Re: compare two array

On Apr 1, 2006, at 11:03 PM, Jerry Krinock wrote: 
on 06/04/01 16:50, Yorh at email@hidden wrote:

I have two Arrays onr with a varibla number of objects and the second
one too.
I have to remove from the first array the object that isn't present
in the second one, but I can't find if there is some method to do it...

I don't believe there is. Write your own method and put it in a category to
NSMutableArray. Enumerate through the second array using - indexOfObject. 

You could also do

NSMutableArray *objectsToRemove = [NSMutableArray arrayWithArray:firstArray];
[objectsToRemove removeObjectsInArray:secondArray];
[firstArray removeObjectsInArray:tempArray];

This may not be as efficient as writing your own, but unless you're dealing with huge numbers of objects it may not matter.

If you go with NSSets as has been suggested by others, it's even simpler and more efficient -- there's a method called intersectSet:.

--Andy

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 >Re: compare two array (From: Jerry Krinock <email@hidden>)



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