I think by "different items" means different items of the array, not different values of those items. Hence values can be equal but items (indexes) must be different.

The problem statement is "The input will always be valid (numbers will be an array of length 2 or greater, and all of the items will be numbers; target will always be the sum of two different items from that array)."

The input can be repeated numbers, i.e if target is 4 , input can be [2,2,1,3] . The above solution gives (0,1) , but actual ans is(2,3) as target will always be the sum of two different items from that array.