done

exercises/advanced_errors/advanced_errs1.rs

@@ -7,8 +7,6 @@
 // Make this code compile! Execute `rustlings hint advanced_errs1` for
 // hints :)
 
-// I AM NOT DONE
-
 use std::num::ParseIntError;
 use std::str::FromStr;
 
@@ -24,6 +22,15 @@ impl From<CreationError> for ParsePosNonzeroError {
     fn from(e: CreationError) -> Self {
         // TODO: complete this implementation so that the `?` operator will
         // work for `CreationError`
+        ParsePosNonzeroError::Creation(e)
+    }
+}
+
+impl From<ParseIntError> for ParsePosNonzeroError {
+    fn from(e: ParseIntError) -> Self {
+        // TODO: complete this implementation so that the `?` operator will
+        // work for `CreationError`
+        ParsePosNonzeroError::ParseInt(e)
     }
 }
 

exercises/advanced_errors/advanced_errs2.rs

@@ -16,8 +16,6 @@
 // 4. Complete the partial implementation of `Display` for
 //    `ParseClimateError`.
 
-// I AM NOT DONE
-
 use std::error::Error;
 use std::fmt::{self, Display, Formatter};
 use std::num::{ParseFloatError, ParseIntError};
@@ -47,11 +45,13 @@ impl From<ParseIntError> for ParseClimateError {
 impl From<ParseFloatError> for ParseClimateError {
     fn from(e: ParseFloatError) -> Self {
         // TODO: Complete this function
+        Self::ParseFloat(e)
     }
 }
 
 // TODO: Implement a missing trait so that `main()` below will compile. It
 // is not necessary to implement any methods inside the missing trait.
+impl Error for ParseClimateError {}
 
 // The `Display` trait allows for other code to obtain the error formatted
 // as a user-visible string.
@@ -62,8 +62,11 @@ impl Display for ParseClimateError {
         // Imports the variants to make the following code more compact.
         use ParseClimateError::*;
         match self {
+            Empty => write!(f, "empty input"),
             NoCity => write!(f, "no city name"),
+            ParseInt(e) => write!(f, "error parsing year: {}", e),
             ParseFloat(e) => write!(f, "error parsing temperature: {}", e),
+            Badlen => write!(f, "incorrect number of fields"),
             _ => write!(f, "unhandled error!"),
         }
     }
@@ -89,11 +92,21 @@ impl FromStr for Climate {
     // TODO: Complete this function by making it handle the missing error
     // cases.
     fn from_str(s: &str) -> Result<Self, Self::Err> {
-        let v: Vec<_> = s.split(',').collect();
+        if s.len() == 0 {
+            return Err(ParseClimateError::Empty);
+        }
+
+        let v: Vec<&str> = s.split(',').collect();
+
         let (city, year, temp) = match &v[..] {
             [city, year, temp] => (city.to_string(), year, temp),
             _ => return Err(ParseClimateError::BadLen),
         };
+
+        if city.len() == 0 {
+            return Err(ParseClimateError::NoCity);
+        }
+
         let year: u32 = year.parse()?;
         let temp: f32 = temp.parse()?;
         Ok(Climate { city, year, temp })

exercises/clippy/clippy1.rs

@@ -6,8 +6,6 @@
 // check clippy's suggestions from the output to solve the exercise.
 // Execute `rustlings hint clippy1` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
     let x = 1.2331f64;
     let y = 1.2332f64;

exercises/clippy/clippy2.rs

@@ -1,13 +1,13 @@
 // clippy2.rs
 // Make me compile! Execute `rustlings hint clippy2` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
     let mut res = 42;
     let option = Some(12);
-    for x in option {
+
+    if let Some(x) = option {
         res += x;
     }
+
     println!("{}", res);
 }

exercises/collections/vec1.rs

@@ -4,11 +4,9 @@
 // Make me compile and pass the test!
 // Execute the command `rustlings hint vec1` if you need hints.
 
-// I AM NOT DONE
-
 fn array_and_vec() -> ([i32; 4], Vec<i32>) {
     let a = [10, 20, 30, 40]; // a plain array
-    let v = // TODO: declare your vector here with the macro for vectors
+    let v = vec![10, 20, 30, 40];// TODO: declare your vector here with the macro for vectors
 
     (a, v)
 }

exercises/collections/vec2.rs

@@ -7,12 +7,9 @@
 // Execute the command `rustlings hint vec2` if you need
 // hints.
 
-// I AM NOT DONE
-
 fn vec_loop(mut v: Vec<i32>) -> Vec<i32> {
     for i in v.iter_mut() {
-        // TODO: Fill this up so that each element in the Vec `v` is
-        // multiplied by 2.
+        *i = *i * 2
     }
 
     // At this point, `v` should be equal to [4, 8, 12, 16, 20].

exercises/conversions/as_ref_mut.rs

@@ -2,17 +2,15 @@
 // 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.
 
-// I AM NOT DONE
-
 // Obtain the number of bytes (not characters) in the given argument
 // Add the AsRef trait appropriately as a trait bound
-fn byte_counter<T>(arg: T) -> usize {
+fn byte_counter<T: AsRef<str>>(arg: T) -> usize {
     arg.as_ref().as_bytes().len()
 }
 
 // Obtain the number of characters (not bytes) in the given argument
 // Add the AsRef trait appropriately as a trait bound
-fn char_counter<T>(arg: T) -> usize {
+fn char_counter<T: AsRef<str>>(arg: T) -> usize {
     arg.as_ref().chars().count()
 }
 

exercises/conversions/from_into.rs

@@ -33,10 +33,33 @@ impl Default for Person {
 // If while parsing the age, something goes wrong, then return the default of Person
 // Otherwise, then return an instantiated Person object with the results
 
-// I AM NOT DONE
-
 impl From<&str> for Person {
     fn from(s: &str) -> Person {
+        if s.len() == 0 {
+            return Person::default();
+        }
+
+        let mut s = s.split(",").collect::<Vec<&str>>();
+
+        if s.len() != 2 {
+            return Person::default();
+        }
+
+        let name = s[0].to_string();
+
+        if name.len() <= 0 {
+            return Person::default()
+        }
+
+        let age = match s[1].parse::<usize>() {
+                Ok(val) => val,
+                Err(_) => { return Person::default() },
+        };
+
+        Person {
+            name,
+            age,
+        }
     }
 }
 

exercises/conversions/from_str.rs

@@ -26,8 +26,6 @@ enum ParsePersonError {
     ParseInt(ParseIntError),
 }
 
-// I AM NOT DONE
-
 // Steps:
 // 1. If the length of the provided string is 0, an error should be returned
 // 2. Split the given string on the commas present in it
@@ -41,6 +39,30 @@ enum ParsePersonError {
 impl FromStr for Person {
     type Err = ParsePersonError;
     fn from_str(s: &str) -> Result<Person, Self::Err> {
+        if s.len() == 0 {
+            return Err(Self::Err::Empty);
+        }
+
+        let mut s = s.split(",").collect::<Vec<&str>>();
+
+        if s.len() != 2 {
+            return Err(Self::Err::BadLen);
+        }
+
+        let name = s[0].to_string();
+
+        if name.len() <= 0 {
+            return Err(Self::Err::NoName);
+        }
+
+        let age = match s[1].parse::<usize>() {
+            Ok(val) => val,
+            Err(err) => {
+                return Err(Self::Err::ParseInt(err));
+            }
+        };
+
+        Ok(Person { name, age })
     }
 }
 

exercises/conversions/try_from_into.rs

@@ -21,8 +21,6 @@ enum IntoColorError {
     IntConversion,
 }
 
-// I AM NOT DONE
-
 // Your task is to complete this implementation
 // and return an Ok result of inner type Color.
 // You need to create an implementation for a tuple of three integers,
@@ -36,6 +34,25 @@ enum IntoColorError {
 impl TryFrom<(i16, i16, i16)> for Color {
     type Error = IntoColorError;
     fn try_from(tuple: (i16, i16, i16)) -> Result<Self, Self::Error> {
+        let red = if tuple.0 >= 0 && tuple.0 <= 255 {
+            tuple.0 as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        let green = if tuple.1 >= 0 && tuple.1 <= 255 {
+            tuple.1 as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        let blue = if tuple.2 >= 0 && tuple.2 <= 255 {
+            tuple.2 as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        Ok(Color { red, green, blue })
     }
 }
 
@@ -43,6 +60,25 @@ impl TryFrom<(i16, i16, i16)> for Color {
 impl TryFrom<[i16; 3]> for Color {
     type Error = IntoColorError;
     fn try_from(arr: [i16; 3]) -> Result<Self, Self::Error> {
+        let red = if arr[0] >= 0 && arr[0] <= 255 {
+            arr[0] as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        let green = if arr[1] >= 0 && arr[1] <= 255 {
+            arr[1] as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        let blue = if arr[2] >= 0 && arr[2] <= 255 {
+            arr[2] as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        Ok(Color { red, green, blue })
     }
 }
 
@@ -50,6 +86,30 @@ impl TryFrom<[i16; 3]> for Color {
 impl TryFrom<&[i16]> for Color {
     type Error = IntoColorError;
     fn try_from(slice: &[i16]) -> Result<Self, Self::Error> {
+
+        if slice.len() != 3 {
+            return Err(Self::Error::BadLen);
+        }
+
+        let red = if slice[0] >= 0 && slice[0] <= 255 {
+            slice[0] as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        let green = if slice[1] >= 0 && slice[1] <= 255 {
+            slice[1] as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        let blue = if slice[2] >= 0 && slice[2] <= 255 {
+            slice[2] as u8
+        } else {
+            return Err(Self::Error::IntConversion);
+        };
+
+        Ok(Color { red, green, blue })
     }
 }
 

exercises/conversions/using_as.rs

@@ -5,11 +5,9 @@
 // The goal is to make sure that the division does not fail to compile
 // and returns the proper type.
 
-// I AM NOT DONE
-
 fn average(values: &[f64]) -> f64 {
     let total = values.iter().fold(0.0, |a, b| a + b);
-    total / values.len()
+    total / values.len() as f64
 }
 
 fn main() {

exercises/macros/macros1.rs

@@ -1,8 +1,6 @@
 // macros1.rs
 // Make me compile! Execute `rustlings hint macros1` for hints :)
 
-// I AM NOT DONE
-
 macro_rules! my_macro {
     () => {
         println!("Check out my macro!");
@@ -10,5 +8,5 @@ macro_rules! my_macro {
 }
 
 fn main() {
-    my_macro();
+    my_macro!();
 }

exercises/macros/macros2.rs

@@ -1,14 +1,13 @@
 // macros2.rs
 // Make me compile! Execute `rustlings hint macros2` for hints :)
 
-// I AM NOT DONE
-
-fn main() {
-    my_macro!();
-}
-
 macro_rules! my_macro {
     () => {
         println!("Check out my macro!");
     };
 }
+
+fn main() {
+    my_macro!();
+}
+

exercises/macros/macros3.rs

@@ -2,14 +2,15 @@
 // Make me compile, without taking the macro out of the module!
 // Execute `rustlings hint macros3` for hints :)
 
-// I AM NOT DONE
-
 mod macros {
+    #[macro_export]
     macro_rules! my_macro {
         () => {
             println!("Check out my macro!");
         };
     }
+
+    pub(crate) use my_macro;
 }
 
 fn main() {

exercises/macros/macros4.rs

@@ -1,12 +1,10 @@
 // macros4.rs
 // Make me compile! Execute `rustlings hint macros4` for hints :)
 
-// I AM NOT DONE
-
 macro_rules! my_macro {
     () => {
         println!("Check out my macro!");
-    }
+    };
     ($val:expr) => {
         println!("Look at this other macro: {}", $val);
     }

exercises/quiz4.rs

@@ -5,7 +5,16 @@
 
 // Write a macro that passes the quiz! No hints this time, you can do it!
 
-// I AM NOT DONE
+mod macros {
+    #[macro_export]
+    macro_rules! my_macro {
+        ($val:expr) => {
+            format!("Hello {}", $val)
+        };
+    }
+
+    pub(crate) use my_macro;
+}
 
 #[cfg(test)]
 mod tests {