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Speaker notes for Method example (#203)

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* Speaker notes for Method example

* Update example.md
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Charisee Chiw 2023-01-23 03:53:33 -08:00 committed by GitHub
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src/methods/example.md
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@ -39,3 +39,14 @@ fn main() {
race.finish();
}
```
<details>
Key Points:
* All four methods here use a different method receiver.
* You can point out how that changes what the function can do with the variable values and if/how it can be used again in `main`.
* You can showcase the error that appears when trying to call `finish` twice.
* Note, that although the method receivers are different, the non-static functions are called the same way in the main body. Rust enables automatic referencing and dereferencing when calling methods. Rust automatically adds in the `&`, `*`, `muts` so that that object matches the method signature.
* You might point out that `print_laps` is using a vector that is iterated over. We describe vectors in more detail in the afternoon.
</details>