Question

I have an NSMutableArray which holds other NSMutableArrays (I’ll call them sub-arrays). These sub-arrays each hold a unique variable called id. I want to return the index path of the sub array which holds a certain id. For example, if one of the sub-arrays had an id of 25, how could I find out the index path of that sub-array (not the index path of the id in the sub-array)?

Thank you in advance. Let me know if you have any questions.

Cheers, Evan.

Answer 1

You will basically have to search manually through all subarrays. For example:

NSUInteger outerIndex = [outerArray indexOfObjectPassingTest:^(id subarray, NSUInteger outerIdx, BOOL *stopOuter) {
    NSUInteger innerIndex = [subarray indexOfObjectPassingTest:^(id obj, NSUInteger innerIdx, BOOL *stopInner) {
        return [obj isEqual:searchTerm];
    }];
    return innerIndex != NSNotFound;
}];
NSUInteger indexes[] = {outerIndex, innerIndex};
NSIndexPath *indexPath = [NSIndexPath indexPathWithIndexes:indexes length:2];