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Lecture notes for Destructing Arrays (#266)

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* Lecture notes for Destructing Arrays

* Update destructuring-arrays.md
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Charisee Chiw 2023-02-22 04:41:12 -08:00 committed by GitHub
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src/pattern-matching/destructuring-arrays.md
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@ -6,10 +6,12 @@ You can destructure arrays, tuples, and slices by matching on their elements:
{{#include ../../third_party/rust-by-example/destructuring-arrays.rs}} {{#include ../../third_party/rust-by-example/destructuring-arrays.rs}}
``` ```
<details> <details>
* Destructuring of slices of unknown length also works with patterns of fixed length. * Destructuring of slices of unknown length also works with patterns of fixed length.
```rust,editable ```rust,editable
fn main() { fn main() {
inspect(&[0, -2, 3]); inspect(&[0, -2, 3]);
@ -26,5 +28,10 @@ fn inspect(slice: &[i32]) {
} }
} }
``` ```
* Create a new pattern using `_` to represent an element.
* Add more values to the array.
* Point out that how `..` will expand to account for different number of elements.
* Show matching against the tail with patterns `[.., b]` and `[a@..,b]` * Show matching against the tail with patterns `[.., b]` and `[a@..,b]`
</details> </details>