What is Iterator?
Walks through a collection one item at a time without exposing how it is stored inside.
next() · item 3 · box stays shut
Iterator lets you traverse…
Write it in your own words in the app.
In real work
Iterator: for item in playlist walks the list so the UI does not care if storage is an array or a link.
In the illustration
Each pull of NEXT pushes one track card out of the slot, 1, 2, then 3; the magazine lid stays shut, so you never see whether it is stacked or chained inside.
Expose the paginated API results in your coding agent through an iterator so callers write for page in results and never see the cursor.
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