Question

I have a nsmutablearray which I add object to it in a for loop from a nsarray. I want it to add object until it reaches NSNotFound in indexOfObject: from NSArray.
The array is inside a for loop to extract string from every index.

My code:

NSInteger untilNotFound = NSNotFound;
NSUInteger index = [array indexOfObject:string];

for (index; index < untilNotFound; index ++)
{           
    [self.mutablearray addObject:[array objectAtIndex: index]];
}

---

Edit:

for (string in array)
{
NSComparisonResult *result = [string compare:searchText options:(NSCaseInsensitiveSearch|NSDiacriticInsensitiveSearch) 
                              range:NSMakeRange(0, [searchText length])];

if (result == NSOrderedSame)
{
            NSInteger index;
            for (index =[array indexOfObject:string]; (index < [array count] && index < 100 && index!= NSNotFound); index ++)
            {
                [self.mutablearray addObject:[array objectAtIndex: index]];         

            }

break;

}

}

---

EDIT.

My previous code that works, it is inside if (result == NSOrderedSame) I just wonder if there is any nicer and easier and performance-friendly solution to extract indexes just before it reaches NSNotFound:

        NSUInteger new = [array indexOfObject:string];

        NSString *last = [array lastObject];

        NSUInteger total = [array indexOfObject:last];

        NSUInteger newmax = new + 10;

        NSUInteger totalminus = total - 11;


        if (newmax <= totalminus )

        {

            [self.mutablearray addObject:string];

            [self.mutablearray addObject:[array objectAtIndex:new + 1]];

            [self.mutablearray addObject:[array objectAtIndex:new + 2]];
            [self.mutablearray addObject:[array objectAtIndex:new + 3]];
            [self.mutablearray addObject:[array objectAtIndex:new + 4]];
            [self.mutablearray addObject:[array objectAtIndex:new + 5]];
            [self.mutablearray addObject:[array objectAtIndex:new + 6]];
            [self.mutablearray addObject:[array objectAtIndex:new + 7]];
            [self.mutablearray addObject:[array objectAtIndex:new + 8]];
            [self.mutablearray addObject:[array objectAtIndex:new + 9]];
            [self.mutablearray addObject:[array objectAtIndex:new + 10]];
        }

        else 
        {
            [self.mutablearray addObject:string];
        }

Answer 1

Looks like you’re trying to do a cumulative subset. Try this:

for(NSInteger index = [array indexOfObject: string]; ((index <  [array count]) &&
                                                      (index <= 100)           &&
                                                      (index != NSNotFound))   ;  index++)
{
    [self.mutablearray addObject: [array objectAtIndex: index]];
}

Or, if you’re just doing a strict subset, try this:

NSInteger startIndex = [array indexOfObject: string];
NSInteger endIndex = MIN([array count], 100);
if(startIndex != NSNotFound)
{
    self.mutablearray = [array subarrayWithRange: NSMakeRange(startIndex, endIndex)] mutableCopy];
}