On Mon, 17 Jun 2024 13:22:43 +0100, Pavel Begunkov wrote: > On 6/17/24 04:16, Chenliang Li wrote: >> Actually here it does account an entire folio. The j is just >> array index. > > Hmm, indeed. Is iteration the only difference here? Yes, but I'll try make this less confusing. Thanks, Chenliang Li