Split out slide for IntoIterator on references - #3281
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Sep 21, 2026
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A few tweaks commented inline, but this is a good change; the flow of teaching this can be annoying with the current slides.
- Update speaker note on IntoIterator slide. - Update GridRefIter to return &u32 to be more idiomatic. - Update linked playground to match code in the slide.
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Currently the slide on
IntoIteratordemonstrates implementing it directly on a type, and then links to a playground in order to demonstrate implementingIntoIteratoron references. This PR pulls that playground out into its own slide and adds some speaker notes to guide the discussion and call out how this pattern is used in the standard library.This is how I've been teaching this section for a while, and I think it goes pretty smoothly, so it's probably worth making into an actual slide.