Question

My class has some @properties (strong); apples, bananas and oranges of NSArray* type; and I’m wondering if this:

for(NSArray* __strong fruit in @[apples, bananas, oranges])     {
    fruit = [fruit sortedArrayUsingComparator:comparator];
}

is the same as this:

apples  = [apples  sortedArrayUsingComparator:comparator];
bananas = [bananas sortedArrayUsingComparator:comparator];
oranges = [oranges sortedArrayUsingComparator:comparator];

comparator is an NSComparator.

I think they should be the same but I’m not sure how the __strong relates to the for loop in this context.

Answer 1

this is not the same code, the loop will not change the values of the variables apples, bananas and oranges

in your loop you assigning the sort-result to the local variable fruit, this will not affect the contents of the values stored in apples, bananas or oranges.

in the ‘unrolled’ code you assigning the sort-result to the original variables, therefore overwriting the content of this variables.

Also i think your loop-type Fruit is wrong, unless apples, bananas and oranges are of type Fruit and not of type NSArray which the rest of the code suggests.