Re: Deleting duplicates in NSMutableArray
Re: Deleting duplicates in NSMutableArray
- Subject: Re: Deleting duplicates in NSMutableArray
- From: King Chung Huang <email@hidden>
- Date: Sun, 04 Jul 2004 16:52:54 -0600
I usually just create a new NSSet from my NSArray, then get an array
out of it. Not sure if it's the most efficient way of getting rid of
duplicates, but it's certainly the easiest!
NSArray *objectsWithDuplicates = ...;
NSSet *duplicatesRemover = [NSSet setWithArray:objectsWithDuplications];
NSArray *uniqueObjects = [duplicatesRemove allObjects];
King Chung Huang
Learning Commons
University of Calgary
On Jul 4, 2004, at 4:04 PM, Johan Kool wrote:
Hi all,
I am a bit stuck with this piece of code that has to remove duplicate
NSStrings from a NSMutableArray. It fails when multiple duplicates
come right after each other in the array. It has to do something with
shifting indexes when an object is deleted, but can't think of how to
solve it.
// Delete duplicates
for (i=0; i < [mutArray count]; i++ ) {
for (j=(i+1); j < [mutArray count]; j++) {
if ([[mutArray objectAtIndex:i] isEqualTo:[mutArray
objectAtIndex:j]]) {
[mutArray removeObjectAtIndex:j];
}
}
}
What do I do wrong?!
Thanks already!
Johan
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