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Created April 14, 2015 09:43
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NSArray
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x
//http://ronnqvi.st/array-intersections-and-differences
NSPredicate *intersectPredicate =
[NSPredicate predicateWithFormat:@"SELF IN %@", otherArray];
NSArray *intersect =
[firstArray filteredArrayUsingPredicate:intersectPredicate];
NSPredicate *relativeComplementPredicate = // a minus b
[NSPredicate predicateWithFormat:@"NOT SELF IN %@", otherArray];
NSArray *relativeComplement =
[firstArray filteredArrayUsingPredicate:relativeComplementPredicate];
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