Question

I am trying to add an integer to each elements in an NSMutableArray but could not find a way to do that. For example, trying to add 5 to an array of elements such as [3, 4, 7] to get [8,9,12].

any help would be great. thanks.

Answer 1

Assuming that the items inside are NSNumber objects, you can do it like this:

for (int i = 0 ; i != arr.count ; i++) {
    NSNumber *n = [arr objectAtIndex:i];
    [arr replaceObjectAtIndex:i
                   withObject:[NSNumber numberWithInt:5 + [n intValue]]
    ];
}