Count in multi-dimensional array - ios

Question

How would you count this array?
NSArray *sortThisArray = #[#{#"numbers":#[#"One",#"Two"]},
#{#"numbers":#[#"Two",#"One"]},
#{#"numbers":#[#"One",#"Two",#"Three"]},
#{#"numbers":#[#"One",#"Two",#"Three"]},
#{#"numbers":#[#"One",#"Two",#"Three",#"Four"]},
];
The desired result would then be:
NSArray *sortedArray = #[#{#"numbers":#[#"One",#"Two"],
#"occures":#(2)},
#{#"numbers":#[#"One",#"Two",#"Three"],
#"occures":#(2)},
#{#"numbers":#[#"One",#"Two",#"Three",#"Four"],
#"occures":#(1)},
];
I've tried using NSCountedSet and countForObject, but the results are inaccurate. It seems to only count the arrays that are exactly the same. In other words, the array with #[#"Two",#"One"] gets ignored because its not 100% equal to #[#"One",#"Two"], even though they have the same objects and same count.

Answer 1

This should work. You have to have a consistent way to compare your arrays (either sorting like in this example or by moving the NSArray to NSSet).
NSMutableDictionary<NSArray<NSString *> *, NSNumber *> *valueCount = [NSMutableDictionary dictionary];
for (NSDictionary<NSString *, NSArray<NSString *> *> *value in sortThisArray) {
NSArray<NSString *> *numberStrings = [value[#"numbers"] sortedArrayUsingSelector:#selector(compare:)];
valueCount[numberStrings] = #(valueCount[numberStrings].integerValue + 1);
}
NSMutableArray *sortedArray = [NSMutableArray arrayWithCapacity:valueCount.count];
for (NSArray<NSString *> *key in valueCount) {
[sortedArray addObject:#{#"numbers": key, #"occures": valueCount[key]}];
}

Answer 2

May be something like this:
NSMutableArray *mArray = [NSMutableArray arrayWithArray:sortThisArray];
NSMutableArray *result = [[NSMutableArray alloc] init];
while ([mArray count]) {
NSDictionary *obj = [mArray firstObject];
int count = 1;
for (int i=1; i<[mArray count]; i++) {
NSDictionary *sObj = [mArray objectAtIndex:i];
if ([[sObj objectForKey:#"numbers"] count] == [[obj objectForKey:#"numbers"] count]) {
BOOL increase = YES;
for (int j=0; j<[[obj objectForKey:#"numbers"] count]; j++) {
if (![[sObj objectForKey:#"numbers"] containsObject:[[obj objectForKey:#"numbers"] objectAtIndex:j]]) {
increase = NO;
}
}
if (increase) {
count++;
[mArray removeObjectAtIndex:i];
}
}
}
[mArray removeObjectAtIndex:0];
[result addObject:#{#"numbers":obj, #"occurrs":[NSNumber numberWithInteger:count]}];
}
*Code is not tested