6 files changed, 0 insertions, 529 deletions
diff --git a/rustlings/exercises/23_conversions/README.md b/rustlings/exercises/23_conversions/README.md
deleted file mode 100644
index 619a78c..0000000
--- a/rustlings/exercises/23_conversions/README.md
+++ /dev/null
@@ -1,23 +0,0 @@
-# Type conversions
-
-Rust offers a multitude of ways to convert a value of a given type into another type.
-
-The simplest form of type conversion is a type cast expression. It is denoted with the binary operator `as`. For instance, `println!("{}", 1 + 1.0);` would not compile, since `1` is an integer while `1.0` is a float. However, `println!("{}", 1 as f32 + 1.0)` should compile. The exercise [`using_as`](using_as.rs) tries to cover this.
-
-Rust also offers traits that facilitate type conversions upon implementation. These traits can be found under the [`convert`](https://doc.rust-lang.org/std/convert/index.html) module.
-The traits are the following:
-
-- `From` and `Into` covered in [`from_into`](from_into.rs)
-- `TryFrom` and `TryInto` covered in [`try_from_into`](try_from_into.rs)
-- `AsRef` and `AsMut` covered in [`as_ref_mut`](as_ref_mut.rs)
-
-Furthermore, the `std::str` module offers a trait called [`FromStr`](https://doc.rust-lang.org/std/str/trait.FromStr.html) which helps with converting strings into target types via the `parse` method on strings. If properly implemented for a given type `Person`, then `let p: Person = "Mark,20".parse().unwrap()` should both compile and run without panicking.
-
-These should be the main ways ***within the standard library*** to convert data into your desired types.
-
-## Further information
-
-These are not directly covered in the book, but the standard library has a great documentation for it.
-
-- [conversions](https://doc.rust-lang.org/std/convert/index.html)
-- [`FromStr` trait](https://doc.rust-lang.org/std/str/trait.FromStr.html)
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);
-    }
-}
diff --git a/rustlings/exercises/23_conversions/from_into.rs b/rustlings/exercises/23_conversions/from_into.rs
deleted file mode 100644
index bc2783a..0000000
--- a/rustlings/exercises/23_conversions/from_into.rs
+++ /dev/null
@@ -1,130 +0,0 @@
-// The `From` trait is used for value-to-value conversions. If `From` is
-// implemented, an implementation of `Into` is automatically provided.
-// You can read more about it in the documentation:
-// https://doc.rust-lang.org/std/convert/trait.From.html
-
-#[derive(Debug)]
-struct Person {
-    name: String,
-    age: u8,
-}
-
-// We implement the Default trait to use it as a fallback when the provided
-// string is not convertible into a `Person` object.
-impl Default for Person {
-    fn default() -> Self {
-        Self {
-            name: String::from("John"),
-            age: 30,
-        }
-    }
-}
-
-// TODO: Complete this `From` implementation to be able to parse a `Person`
-// out of a string in the form of "Mark,20".
-// Note that you'll need to parse the age component into a `u8` with something
-// like `"4".parse::<u8>()`.
-//
-// Steps:
-// 1. Split the given string on the commas present in it.
-// 2. If the split operation returns less or more than 2 elements, return the
-//    default of `Person`.
-// 3. Use the first element from the split operation as the name.
-// 4. If the name is empty, return the default of `Person`.
-// 5. Parse the second element from the split operation into a `u8` as the age.
-// 6. If parsing the age fails, return the default of `Person`.
-impl From<&str> for Person {
-    fn from(s: &str) -> Self {}
-}
-
-fn main() {
-    // Use the `from` function.
-    let p1 = Person::from("Mark,20");
-    println!("{p1:?}");
-
-    // Since `From` is implemented for Person, we are able to use `Into`.
-    let p2: Person = "Gerald,70".into();
-    println!("{p2:?}");
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn test_default() {
-        let dp = Person::default();
-        assert_eq!(dp.name, "John");
-        assert_eq!(dp.age, 30);
-    }
-
-    #[test]
-    fn test_bad_convert() {
-        let p = Person::from("");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_good_convert() {
-        let p = Person::from("Mark,20");
-        assert_eq!(p.name, "Mark");
-        assert_eq!(p.age, 20);
-    }
-
-    #[test]
-    fn test_bad_age() {
-        let p = Person::from("Mark,twenty");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_missing_comma_and_age() {
-        let p: Person = Person::from("Mark");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_missing_age() {
-        let p: Person = Person::from("Mark,");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_missing_name() {
-        let p: Person = Person::from(",1");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_missing_name_and_age() {
-        let p: Person = Person::from(",");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_missing_name_and_invalid_age() {
-        let p: Person = Person::from(",one");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_trailing_comma() {
-        let p: Person = Person::from("Mike,32,");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-
-    #[test]
-    fn test_trailing_comma_and_some_string() {
-        let p: Person = Person::from("Mike,32,dog");
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 30);
-    }
-}
diff --git a/rustlings/exercises/23_conversions/from_str.rs b/rustlings/exercises/23_conversions/from_str.rs
deleted file mode 100644
index ec6d3fd..0000000
--- a/rustlings/exercises/23_conversions/from_str.rs
+++ /dev/null
@@ -1,113 +0,0 @@
-// This is similar to the previous `from_into` exercise. But this time, we'll
-// implement `FromStr` and return errors instead of falling back to a default
-// value. Additionally, upon implementing `FromStr`, you can use the `parse`
-// method on strings to generate an object of the implementor type. You can read
-// more about it in the documentation:
-// https://doc.rust-lang.org/std/str/trait.FromStr.html
-
-use std::num::ParseIntError;
-use std::str::FromStr;
-
-#[derive(Debug, PartialEq)]
-struct Person {
-    name: String,
-    age: u8,
-}
-
-// We will use this error type for the `FromStr` implementation.
-#[derive(Debug, PartialEq)]
-enum ParsePersonError {
-    // Incorrect number of fields
-    BadLen,
-    // Empty name field
-    NoName,
-    // Wrapped error from parse::<u8>()
-    ParseInt(ParseIntError),
-}
-
-// TODO: Complete this `FromStr` implementation to be able to parse a `Person`
-// out of a string in the form of "Mark,20".
-// Note that you'll need to parse the age component into a `u8` with something
-// like `"4".parse::<u8>()`.
-//
-// Steps:
-// 1. Split the given string on the commas present in it.
-// 2. If the split operation returns less or more than 2 elements, return the
-//    error `ParsePersonError::BadLen`.
-// 3. Use the first element from the split operation as the name.
-// 4. If the name is empty, return the error `ParsePersonError::NoName`.
-// 5. Parse the second element from the split operation into a `u8` as the age.
-// 6. If parsing the age fails, return the error `ParsePersonError::ParseInt`.
-impl FromStr for Person {
-    type Err = ParsePersonError;
-
-    fn from_str(s: &str) -> Result<Self, Self::Err> {}
-}
-
-fn main() {
-    let p = "Mark,20".parse::<Person>();
-    println!("{p:?}");
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use ParsePersonError::*;
-
-    #[test]
-    fn empty_input() {
-        assert_eq!("".parse::<Person>(), Err(BadLen));
-    }
-
-    #[test]
-    fn good_input() {
-        let p = "John,32".parse::<Person>();
-        assert!(p.is_ok());
-        let p = p.unwrap();
-        assert_eq!(p.name, "John");
-        assert_eq!(p.age, 32);
-    }
-
-    #[test]
-    fn missing_age() {
-        assert!(matches!("John,".parse::<Person>(), Err(ParseInt(_))));
-    }
-
-    #[test]
-    fn invalid_age() {
-        assert!(matches!("John,twenty".parse::<Person>(), Err(ParseInt(_))));
-    }
-
-    #[test]
-    fn missing_comma_and_age() {
-        assert_eq!("John".parse::<Person>(), Err(BadLen));
-    }
-
-    #[test]
-    fn missing_name() {
-        assert_eq!(",1".parse::<Person>(), Err(NoName));
-    }
-
-    #[test]
-    fn missing_name_and_age() {
-        assert!(matches!(",".parse::<Person>(), Err(NoName | ParseInt(_))));
-    }
-
-    #[test]
-    fn missing_name_and_invalid_age() {
-        assert!(matches!(
-            ",one".parse::<Person>(),
-            Err(NoName | ParseInt(_)),
-        ));
-    }
-
-    #[test]
-    fn trailing_comma() {
-        assert_eq!("John,32,".parse::<Person>(), Err(BadLen));
-    }
-
-    #[test]
-    fn trailing_comma_and_some_string() {
-        assert_eq!("John,32,man".parse::<Person>(), Err(BadLen));
-    }
-}
diff --git a/rustlings/exercises/23_conversions/try_from_into.rs b/rustlings/exercises/23_conversions/try_from_into.rs
deleted file mode 100644
index f3ae80a..0000000
--- a/rustlings/exercises/23_conversions/try_from_into.rs
+++ /dev/null
@@ -1,177 +0,0 @@
-// `TryFrom` is a simple and safe type conversion that may fail in a controlled
-// way under some circumstances. Basically, this is the same as `From`. The main
-// difference is that this should return a `Result` type instead of the target
-// type itself. You can read more about it in the documentation:
-// https://doc.rust-lang.org/std/convert/trait.TryFrom.html
-
-#![allow(clippy::useless_vec)]
-use std::convert::{TryFrom, TryInto};
-
-#[derive(Debug, PartialEq)]
-struct Color {
-    red: u8,
-    green: u8,
-    blue: u8,
-}
-
-// We will use this error type for the `TryFrom` conversions.
-#[derive(Debug, PartialEq)]
-enum IntoColorError {
-    // Incorrect length of slice
-    BadLen,
-    // Integer conversion error
-    IntConversion,
-}
-
-// TODO: Tuple implementation.
-// Correct RGB color values must be integers in the 0..=255 range.
-impl TryFrom<(i16, i16, i16)> for Color {
-    type Error = IntoColorError;
-
-    fn try_from(tuple: (i16, i16, i16)) -> Result<Self, Self::Error> {}
-}
-
-// TODO: Array implementation.
-impl TryFrom<[i16; 3]> for Color {
-    type Error = IntoColorError;
-
-    fn try_from(arr: [i16; 3]) -> Result<Self, Self::Error> {}
-}
-
-// TODO: Slice implementation.
-// This implementation needs to check the slice length.
-impl TryFrom<&[i16]> for Color {
-    type Error = IntoColorError;
-
-    fn try_from(slice: &[i16]) -> Result<Self, Self::Error> {}
-}
-
-fn main() {
-    // Using the `try_from` function.
-    let c1 = Color::try_from((183, 65, 14));
-    println!("{c1:?}");
-
-    // Since `TryFrom` is implemented for `Color`, we can use `TryInto`.
-    let c2: Result<Color, _> = [183, 65, 14].try_into();
-    println!("{c2:?}");
-
-    let v = vec![183, 65, 14];
-    // With slice we should use the `try_from` function
-    let c3 = Color::try_from(&v[..]);
-    println!("{c3:?}");
-    // or put the slice within round brackets and use `try_into`.
-    let c4: Result<Color, _> = (&v[..]).try_into();
-    println!("{c4:?}");
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use IntoColorError::*;
-
-    #[test]
-    fn test_tuple_out_of_range_positive() {
-        assert_eq!(Color::try_from((256, 1000, 10000)), Err(IntConversion));
-    }
-
-    #[test]
-    fn test_tuple_out_of_range_negative() {
-        assert_eq!(Color::try_from((-1, -10, -256)), Err(IntConversion));
-    }
-
-    #[test]
-    fn test_tuple_sum() {
-        assert_eq!(Color::try_from((-1, 255, 255)), Err(IntConversion));
-    }
-
-    #[test]
-    fn test_tuple_correct() {
-        let c: Result<Color, _> = (183, 65, 14).try_into();
-        assert!(c.is_ok());
-        assert_eq!(
-            c.unwrap(),
-            Color {
-                red: 183,
-                green: 65,
-                blue: 14,
-            }
-        );
-    }
-
-    #[test]
-    fn test_array_out_of_range_positive() {
-        let c: Result<Color, _> = [1000, 10000, 256].try_into();
-        assert_eq!(c, Err(IntConversion));
-    }
-
-    #[test]
-    fn test_array_out_of_range_negative() {
-        let c: Result<Color, _> = [-10, -256, -1].try_into();
-        assert_eq!(c, Err(IntConversion));
-    }
-
-    #[test]
-    fn test_array_sum() {
-        let c: Result<Color, _> = [-1, 255, 255].try_into();
-        assert_eq!(c, Err(IntConversion));
-    }
-
-    #[test]
-    fn test_array_correct() {
-        let c: Result<Color, _> = [183, 65, 14].try_into();
-        assert!(c.is_ok());
-        assert_eq!(
-            c.unwrap(),
-            Color {
-                red: 183,
-                green: 65,
-                blue: 14
-            }
-        );
-    }
-
-    #[test]
-    fn test_slice_out_of_range_positive() {
-        let arr = [10000, 256, 1000];
-        assert_eq!(Color::try_from(&arr[..]), Err(IntConversion));
-    }
-
-    #[test]
-    fn test_slice_out_of_range_negative() {
-        let arr = [-256, -1, -10];
-        assert_eq!(Color::try_from(&arr[..]), Err(IntConversion));
-    }
-
-    #[test]
-    fn test_slice_sum() {
-        let arr = [-1, 255, 255];
-        assert_eq!(Color::try_from(&arr[..]), Err(IntConversion));
-    }
-
-    #[test]
-    fn test_slice_correct() {
-        let v = vec![183, 65, 14];
-        let c: Result<Color, _> = Color::try_from(&v[..]);
-        assert!(c.is_ok());
-        assert_eq!(
-            c.unwrap(),
-            Color {
-                red: 183,
-                green: 65,
-                blue: 14,
-            }
-        );
-    }
-
-    #[test]
-    fn test_slice_excess_length() {
-        let v = vec![0, 0, 0, 0];
-        assert_eq!(Color::try_from(&v[..]), Err(BadLen));
-    }
-
-    #[test]
-    fn test_slice_insufficient_length() {
-        let v = vec![0, 0];
-        assert_eq!(Color::try_from(&v[..]), Err(BadLen));
-    }
-}
diff --git a/rustlings/exercises/23_conversions/using_as.rs b/rustlings/exercises/23_conversions/using_as.rs
deleted file mode 100644
index c131d1f..0000000
--- a/rustlings/exercises/23_conversions/using_as.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-// Type casting in Rust is done via the usage of the `as` operator.
-// Note that the `as` operator is not only used when type casting. It also helps
-// with renaming imports.
-
-fn average(values: &[f64]) -> f64 {
-    let total = values.iter().sum::<f64>();
-    // TODO: Make a conversion before dividing.
-    total / values.len()
-}
-
-fn main() {
-    let values = [3.5, 0.3, 13.0, 11.7];
-    println!("{}", average(&values));
-}
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-
-    #[test]
-    fn returns_proper_type_and_value() {
-        assert_eq!(average(&[3.5, 0.3, 13.0, 11.7]), 7.125);
-    }
-}