How to compare arrays? And change attributes?

Question

I\'m new ios developer, I want to compare and change attributes

Array1 = (object1,object2, object3, object4) Array2 = (object2,object4, object5, object8)

Compare

Answer 1

I think you'll have to do a n*n search in this case. Loop through every object in Array1, have a nested loop and compare every item in Array2 to the current object (in Array1). If they are equal then change your attribute.

for (int i = 0; i < [array1 count]; i++)
    for (int j = 0; j < [array2 count]; j++)
        if ([array1 objectAtIndex:i] == [array2 objectAtIndex:j]) {
            // do yo thangs
        }