Sorting and filtering duplications

sort-filter-nsarray.m

- (NSArray<NSNumber *> *)sortArray:(NSArray<NSNumber *> *)array {
    NSArray<NSNumber *> *sortedArray = [array sortedArrayUsingComparator:^NSComparisonResult(NSNumber *num1, NSNumber *num2) {
        return [num1 compare:num2];
    }];
    NSOrderedSet *orderedSet = [NSOrderedSet orderedSetWithArray:sortedArray];
    NSArray *arrayWithoutDuplicates = orderedSet.array;
    return arrayWithoutDuplicates;
}