How NSSet compares values in array to remove duplicates when using SetWithArray

Question

I have NSArray and I want to remove duplicates from it. I know that using this method [NSSet setWithArray:[arrAllValues valueForKey:@"value"]] I also know that it invokes method specified in valueForKey parameter. But I don't know what method NSSet invokes to compare objects in array. My problem is that I want to compare property named "value", but I want to return array of the object that contains the property and not the property. Can I do that?

Thanks !!!

Please refer this question: http://stackoverflow.com/questions/1025674/the-best-way-to-remove-duplicate-values-from-nsmutablearray-in-objective-c — vadivelu, Mar 23 '12 at 13:48

score 1 · Accepted Answer · answered Mar 23 '12 at 13:22

1

It compares them using the NSObject protocol reference method:

- (BOOL)isEqual:(id)anObject

therefore, you can override this method in your class to implement the desired behavior, as a note just like you would do it in Java, you should also override hash.

answered Mar 23 '12 at 13:22

Oscar Gomez

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Thanks for the Answer Oscar!!! It worked!! I just didn't know what methods to override!! – NetDeveloper Mar 23 '12 at 15:40

How NSSet compares values in array to remove duplicates when using SetWithArray

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