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| author | Hunter Kvalevog <hunter@kvog.sh> | 2026-10-02 21:53:51 -0500 |
|---|---|---|
| committer | Hunter Kvalevog <hunter@kvog.sh> | 2026-10-02 21:53:51 -0500 |
| commit | 4dfc11d74ab02ac5765ae5d08fb750c91f4744b4 (patch) | |
| tree | 17ba62056d6b691dd0217b0e8f1b3a5826dce0f6 /rustlings/exercises/23_conversions/as_ref_mut.rs | |
| parent | 02d8f1c62896576e1266553a56980eddbc2a88d7 (diff) | |
rustlings: move to rust/
Diffstat (limited to 'rustlings/exercises/23_conversions/as_ref_mut.rs')
| -rw-r--r-- | rustlings/exercises/23_conversions/as_ref_mut.rs | 62 |
1 files changed, 0 insertions, 62 deletions
diff --git a/rustlings/exercises/23_conversions/as_ref_mut.rs b/rustlings/exercises/23_conversions/as_ref_mut.rs deleted file mode 100644 index d7892dd..0000000 --- a/rustlings/exercises/23_conversions/as_ref_mut.rs +++ /dev/null @@ -1,62 +0,0 @@ -// AsRef and AsMut allow for cheap reference-to-reference conversions. Read more -// about them at https://doc.rust-lang.org/std/convert/trait.AsRef.html and -// https://doc.rust-lang.org/std/convert/trait.AsMut.html, respectively. - -// Obtain the number of bytes (not characters) in the given argument -// (`.len()` returns the number of bytes in a string). -// TODO: Add the `AsRef` trait appropriately as a trait bound. -fn byte_counter<T>(arg: T) -> usize { - arg.as_ref().len() -} - -// Obtain the number of characters (not bytes) in the given argument. -// TODO: Add the `AsRef` trait appropriately as a trait bound. -fn char_counter<T>(arg: T) -> usize { - arg.as_ref().chars().count() -} - -// Squares a number using `as_mut()`. -// TODO: Add the appropriate trait bound. -fn num_sq<T>(arg: &mut T) { - // TODO: Implement the function body. -} - -fn main() { - // You can optionally experiment here. -} - -#[cfg(test)] -mod tests { - use super::*; - - #[test] - fn different_counts() { - let s = "Café au lait"; - assert_ne!(char_counter(s), byte_counter(s)); - } - - #[test] - fn same_counts() { - let s = "Cafe au lait"; - assert_eq!(char_counter(s), byte_counter(s)); - } - - #[test] - fn different_counts_using_string() { - let s = String::from("Café au lait"); - assert_ne!(char_counter(s.clone()), byte_counter(s)); - } - - #[test] - fn same_counts_using_string() { - let s = String::from("Cafe au lait"); - assert_eq!(char_counter(s.clone()), byte_counter(s)); - } - - #[test] - fn mut_box() { - let mut num: Box<u32> = Box::new(3); - num_sq(&mut num); - assert_eq!(*num, 9); - } -} |