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Code Issues Releases Activity

Add link to GridRefIter example (#2633)

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Nicole L 2025-02-07 11:04:32 -08:00 committed by GitHub
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src/iterators/intoiterator.md
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@ -76,8 +76,9 @@ The example iterates over all combinations of x and y coordinates.
Try iterating over the grid twice in `main`. Why does this fail? Note that Try iterating over the grid twice in `main`. Why does this fail? Note that
`IntoIterator::into_iter` takes ownership of `self`. `IntoIterator::into_iter` takes ownership of `self`.
Fix this issue by implementing `IntoIterator` for `&Grid` and storing a Fix this issue by implementing `IntoIterator` for `&Grid` and creating a
reference to the `Grid` in `GridIter`. `GridRefIter` that iterates by reference. A version with both `GridIter` and
`GridRefIter` is available [in this playground][1].
The same problem can occur for standard library types: `for e in some_vector` The same problem can occur for standard library types: `for e in some_vector`
will take ownership of `some_vector` and iterate over owned elements from that will take ownership of `some_vector` and iterate over owned elements from that
@ -85,3 +86,5 @@ vector. Use `for e in &some_vector` instead, to iterate over references to
elements of `some_vector`. elements of `some_vector`.
</details> </details>
[1]: https://play.rust-lang.org/?version=stable&mode=debug&edition=2021&gist=947e371c7295af758504f01f149023a1