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Fix typo in args().next() (#400)

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* Fix typo in args().next()

Follow up on #367

* Update match-expressions.md
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Charisee Chiw 2023-02-13 13:56:38 -08:00 committed by GitHub
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src/control-flow/match-expressions.md
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@ -26,7 +26,7 @@ Rust.
* Save the match expression to a variable and print it out. * Save the match expression to a variable and print it out.
* Remove `.as_deref()` and explain the error. * Remove `.as_deref()` and explain the error.
* `std::env::Agrs().next` returns an `Option<&String>`, but we cannot match against `String`. * `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>`. * `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`. * We can now use pattern matching to match against the `&str` inside `Option`.
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