How to perform an action at the end of "for each X element"

I am populating an array, then using each member in the array.

At the end of this loop I want to destroy the instance of the array.

I can't just look for the size of the array to be equal to 0 (zero) because the array starts out empty, before I fill it.

Any ideas??

Don't check if the array size is equal to 0 until you've started populating it.