How to compare two NSArrays for equal content?

Question

I have 2 Nsarray where objects of 2 arrays are same may be indexes of the object differs, but it should print both are equal irrespective of there indexes

NSArra         


        

Answer 1

Most of the answers here actually do not work for fairly common cases (see their comments). There is a very good data structure that will solve this problem: NSCountedSet.

The counted set is unordered, but does care about the number of items present, so you don't end up with @[1, @1, @2] == @[@1, @2, @2].

NSArray *array1 = @[@1, @1, @2];
NSArray *array2 = @[@1, @2, @2];

NSCountedSet *set1 = [[NSCountedSet alloc] initWithArray:array1];
NSCountedSet *set2 = [[NSCountedSet alloc] initWithArray:array2];

BOOL isEqual = [set1 isEqualToSet:set2];
NSLog(@"isEqual:%d", isEqual);