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Code Issues Releases Activity

Fix references within options returned from Args (#427)

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This fixes #426
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Andrew Jones 2023-02-16 21:54:18 +00:00 committed by GitHub
parent 5c03394b31
commit 9a4cda6f35
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1 changed files with 3 additions and 3 deletions
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6
src/control-flow/match-expressions.md
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@ -23,10 +23,10 @@ See [pattern matching](../pattern-matching.md) for more details on patterns in
Rust.
<details>
* Save the match expression to a variable and print it out.
* Remove `.as_deref()` and explain the error.
* `std::env::args().next()` returns an `Option<&String>`, but we cannot match against `String`.
* `as_deref()` transforms an `Option<T>` to `Option<T::Target>`. In our case, this turns `Option<&String>` into `Option<&str>`.
* `std::env::args().next()` returns an `Option<String>`, but we cannot match against `String`.
* `as_deref()` transforms an `Option<T>` to `Option<&T::Target>`. In our case, this turns `Option<String>` into `Option<&str>`.
* We can now use pattern matching to match against the `&str` inside `Option`.
</details>