How to tell if I'm on the last iteration of a for X in Y loop in Objective-C

Question

I have a loop using the for (NSObject *obj in someArray) { } syntax. Is there an easy way to tell if I'm on the last iteration of the loop (ie. without having to use [someArray count])

Answer 1

Maybe this will work?

if ( obj == [ someArray lastObject ] ) {
    // ...
}

Answer 2

You could use NSArray#lastObject to determine if obj is equal to [NSArray lastObject].

for (NSObject *obj in someArray) {
    if ([someArray lastObject] == obj) {
        NSLog(@"Last iteration");
    }
}

Answer 3

Rather than call into the array at every iteration, it might be better to cache the last object in the array:

NSObject *lastObject = [someArray lastObject];
for (NSObject *obj in someArray) {

    // Loop code

    if (obj == lastObject) {
        // do what you want for the last array item
    }
}