NSArray out of bounds check

Question

noobie question.. What is the best way to check if the index of an NSArray or NSMutableArray exists. I search everywhere to no avail!!

This is what I have tried:

if (sections = [arr objectAtIndex:4])
{
    /*.....*/
}

or

sections = [arr objectAtIndex:4]
if (sections == nil)
{
    /*.....*/
}

but both throws an "out of bounds" error not allowing me to continue

(do not reply with a try catch because thats not a solution for me)

Thanks in advance

Answer 1

if (array.count > 4) {
    sections = [array objectAtIndex:4];
}

Answer 2

If you have an integer index (e.g. i), you can generally prevent this error by checking the arrays bounds like this

int indexForObjectInArray = 4;
NSArray yourArray = ...

if (indexForObjectInArray < [yourArray count])
{
    id objectOfArray = [yourArray objectAtIndex:indexForObjectInArray];
}