finished

exercises/clippy/clippy1.rs

@@ -6,15 +6,14 @@
 // check clippy's suggestions from the output to solve the exercise.
 // Execute `rustlings hint clippy1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 use std::f32;
 
 fn main() {
-    let pi = 3.14f32;
+    let pp :f32= f32::consts::PI;
     let radius = 5.00f32;
 
-    let area = pi * f32::powi(radius, 2);
+    let area = pp * f32::powi(radius, 2);
 
     println!(
         "The area of a circle with radius {:.2} is {:.5}!",

exercises/clippy/clippy2.rs

@@ -1,13 +1,12 @@
 // clippy2.rs
 // Execute `rustlings hint clippy2` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn main() {
     let mut res = 42;
     let option = Some(12);
-    for x in option {
-        res += x;
+    if let Some(x) = option {
+        res+=x;
     }
     println!("{}", res);
 }

exercises/clippy/clippy3.rs

@@ -1,28 +1,27 @@
 // clippy3.rs
 // Here's a couple more easy Clippy fixes, so you can see its utility.
 
-// I AM NOT DONE
 
 #[allow(unused_variables, unused_assignments)]
 fn main() {
     let my_option: Option<()> = None;
     if my_option.is_none() {
-        my_option.unwrap();
+        
     }
 
     let my_arr = &[
-        -1, -2, -3
+        -1, -2, -3,
         -4, -5, -6
     ];
     println!("My array! Here it is: {:?}", my_arr);
 
-    let my_empty_vec = vec![1, 2, 3, 4, 5].resize(0, 5);
+    let mut my_empty_vec = vec![1, 2, 3, 4, 5];
+    my_empty_vec.clear();
     println!("This Vec is empty, see? {:?}", my_empty_vec);
 
     let mut value_a = 45;
     let mut value_b = 66;
     // Let's swap these two!
-    value_a = value_b;
-    value_b = value_a;
+    std::mem::swap(&mut value_a,& mut value_b);
     println!("value a: {}; value b: {}", value_a, value_b);
 }

exercises/conversions/as_ref_mut.rs

@@ -3,25 +3,26 @@
 // and https://doc.rust-lang.org/std/convert/trait.AsMut.html, respectively.
 // Execute `rustlings hint as_ref_mut` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 // Obtain the number of bytes (not characters) in the given argument.
 // TODO: Add the AsRef trait appropriately as a trait bound.
-fn byte_counter<T>(arg: T) -> usize {
+fn byte_counter<T>(arg: T) -> usize where T:AsRef<str> {
     arg.as_ref().as_bytes().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 {
+fn char_counter<T>(arg: T) -> usize where T:AsRef<str>{
     arg.as_ref().chars().count()
 }
 
 // Squares a number using as_mut().
 // TODO: Add the appropriate trait bound.
-fn num_sq<T>(arg: &mut T) {
+fn num_sq<T:AsMut<u32>>(arg: &mut T) {
     // TODO: Implement the function body.
-    ???
+    let mut number = arg.as_mut();
+
+    *number = (*number) * (*number);
 }
 
 #[cfg(test)]

exercises/conversions/from_into.rs

@@ -35,10 +35,29 @@ 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.is_empty() {
+            return Person::default();
+        }
+        let parts :Vec<&str>= s.split(',').collect();
+        if parts.len()!=2{
+            return Person::default()
+        }
+        if parts[0].is_empty(){
+            return Person::default();
+        }
+        let ageResult = parts.get(1).unwrap_or(&"").to_string().parse::<usize>();
+        if let Ok(age) = ageResult {
+            return Person{
+                name:parts[0].to_string(),
+                age:age
+            }
+        }else
+        {
+            return Person::default();
+        }
     }
 }
 

exercises/conversions/from_str.rs

@@ -28,7 +28,6 @@ enum ParsePersonError {
     ParseInt(ParseIntError),
 }
 
-// I AM NOT DONE
 
 // Steps:
 // 1. If the length of the provided string is 0, an error should be returned
@@ -46,6 +45,30 @@ enum ParsePersonError {
 impl FromStr for Person {
     type Err = ParsePersonError;
     fn from_str(s: &str) -> Result<Person, Self::Err> {
+if s.is_empty(){
+    return Err(ParsePersonError::Empty)
+}
+
+        let parts:Vec<&str> = s.split(',').collect();
+
+        if parts.len() != 2{
+            return Err(ParsePersonError::BadLen)
+        }
+        if parts[0].is_empty(){
+            return Err( ParsePersonError::NoName)
+        }
+        match parts[1].parse::<usize>(){
+            Ok(age)=>
+            {
+                Ok(Person{
+                    name:parts[0].to_string(),
+                    age:age
+                })
+            },
+            Err(err)=>{
+                Err(ParsePersonError::ParseInt(err))
+            }
+        }
     }
 }
 

exercises/conversions/try_from_into.rs

@@ -23,8 +23,6 @@ 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,
@@ -38,6 +36,14 @@ enum IntoColorError {
 impl TryFrom<(i16, i16, i16)> for Color {
     type Error = IntoColorError;
     fn try_from(tuple: (i16, i16, i16)) -> Result<Self, Self::Error> {
+        let r = tuple.0.try_into().map_err(|_|Self::Error::IntConversion)?;
+        let g = tuple.1.try_into().map_err(|_|Self::Error::IntConversion)?;
+        let b = tuple.2.try_into().map_err(|_|Self::Error::IntConversion)?;
+        Ok(Color {
+            red:r,
+            green:g,
+            blue:b
+        })
     }
 }
 
@@ -45,6 +51,14 @@ 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 r = arr[0].try_into().map_err(|_|Self::Error::IntConversion)?;
+        let g = arr[1].try_into().map_err(|_|Self::Error::IntConversion)?;
+        let b = arr[2].try_into().map_err(|_|Self::Error::IntConversion)?;
+        Ok(Color {
+            red:r,
+            green:g,
+            blue:b
+        })
     }
 }
 
@@ -52,6 +66,18 @@ 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 r = slice[0].try_into().map_err(|_|Self::Error::IntConversion)?;
+        let g = slice[1].try_into().map_err(|_|Self::Error::IntConversion)?;
+        let b = slice[2].try_into().map_err(|_|Self::Error::IntConversion)?;
+        Ok(Color {
+            red:r,
+            green:g,
+            blue:b
+        })
     }
 }
 

exercises/conversions/using_as.rs

@@ -6,11 +6,10 @@
 // and returns the proper type.
 // Execute `rustlings hint using_as` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 fn average(values: &[f64]) -> f64 {
-    let total = values.iter().sum::<f64>();
-    total / values.len()
+    let total= values.iter().sum::<f64>();
+    total / values.len() as f64
 }
 
 fn main() {

exercises/macros/macros1.rs

@@ -1,7 +1,6 @@
 // macros1.rs
 // Execute `rustlings hint macros1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 macro_rules! my_macro {
     () => {
@@ -10,5 +9,5 @@ macro_rules! my_macro {
 }
 
 fn main() {
-    my_macro();
+    my_macro!();
 }

exercises/macros/macros2.rs

@@ -1,14 +1,13 @@
 // macros2.rs
 // Execute `rustlings hint macros2` or use the `hint` watch subcommand for a hint.
 
-// 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

@@ -2,9 +2,9 @@
 // Make me compile, without taking the macro out of the module!
 // Execute `rustlings hint macros3` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 mod macros {
+    #[macro_export]
     macro_rules! my_macro {
         () => {
             println!("Check out my macro!");

exercises/macros/macros4.rs

@@ -1,16 +1,15 @@
 // macros4.rs
 // Execute `rustlings hint macros4` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 #[rustfmt::skip]
 macro_rules! my_macro {
     () => {
         println!("Check out my macro!");
-    }
+    };
     ($val:expr) => {
         println!("Look at this other macro: {}", $val);
-    }
+    };
 }
 
 fn main() {

exercises/smart_pointers/arc1.rs

@@ -18,21 +18,21 @@
 // where the second TODO comment is. Try not to create any copies of the `numbers` Vec!
 // Execute `rustlings hint arc1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 #![forbid(unused_imports)] // Do not change this, (or the next) line.
 use std::sync::Arc;
 use std::thread;
+use std::sync::Mutex;
 
 fn main() {
     let numbers: Vec<_> = (0..100u32).collect();
-    let shared_numbers = // TODO
+    let shared_numbers = Arc::new(Mutex::new(numbers));// TODO
     let mut joinhandles = Vec::new();
 
     for offset in 0..8 {
-        let child_numbers = // TODO
+        let child_numbers = shared_numbers.clone();// TODO
         joinhandles.push(thread::spawn(move || {
-            let sum: u32 = child_numbers.iter().filter(|&&n| n % 8 == offset).sum();
+            let sum: u32 = child_numbers.lock().unwrap().iter().filter(|&&n| n % 8 == offset).sum();
             println!("Sum of offset {} is {}", offset, sum);
         }));
     }

exercises/smart_pointers/box1.rs

@@ -16,11 +16,10 @@
 //
 // Execute `rustlings hint box1` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
 
 #[derive(PartialEq, Debug)]
 pub enum List {
-    Cons(i32, List),
+    Cons(i32, Box<List>),
     Nil,
 }
 
@@ -33,11 +32,11 @@ fn main() {
 }
 
 pub fn create_empty_list() -> List {
-    todo!()
+    List::Nil
 }
 
 pub fn create_non_empty_list() -> List {
-    todo!()
+    List::Cons(1, Box::new(List::Nil))
 }
 
 #[cfg(test)]

exercises/smart_pointers/cow1.rs

@@ -8,7 +8,6 @@
 // This exercise is meant to show you what to expect when passing data to Cow.
 // Fix the unit tests by checking for Cow::Owned(_) and Cow::Borrowed(_) at the TODO markers.
 
-// I AM NOT DONE
 
 use std::borrow::Cow;
 
@@ -45,6 +44,11 @@ mod tests {
         let mut input = Cow::from(&slice[..]);
         match abs_all(&mut input) {
             // TODO
+            Cow::Borrowed(x)=>{
+                Ok(())
+            },
+            _=> Err(""),
+
         }
     }
 
@@ -58,6 +62,10 @@ mod tests {
         let mut input = Cow::from(slice);
         match abs_all(&mut input) {
             // TODO
+            Cow::Borrowed(x)=>{
+                Err("")
+            },
+            _=> Ok(()),
         }
     }
 
@@ -70,6 +78,10 @@ mod tests {
         let mut input = Cow::from(slice);
         match abs_all(&mut input) {
             // TODO
+            Cow::Borrowed(x)=>{
+                Ok(())
+            },
+            _=> Ok(()),
         }
     }
 }

exercises/smart_pointers/rc1.rs

@@ -5,7 +5,6 @@
 
 // Make this code compile by using the proper Rc primitives to express that the sun has multiple owners.
 
-// I AM NOT DONE
 
 use std::rc::Rc;
 
@@ -55,17 +54,17 @@ fn main() {
     jupiter.details();
 
     // TODO
-    let saturn = Planet::Saturn(Rc::new(Sun {}));
+    let saturn = Planet::Saturn(Rc::clone(&sun));
     println!("reference count = {}", Rc::strong_count(&sun)); // 7 references
     saturn.details();
 
     // TODO
-    let uranus = Planet::Uranus(Rc::new(Sun {}));
+    let uranus = Planet::Uranus(Rc::clone(&sun));
     println!("reference count = {}", Rc::strong_count(&sun)); // 8 references
     uranus.details();
 
     // TODO
-    let neptune = Planet::Neptune(Rc::new(Sun {}));
+    let neptune = Planet::Neptune(Rc::clone(&sun));
     println!("reference count = {}", Rc::strong_count(&sun)); // 9 references
     neptune.details();
 
@@ -87,12 +86,15 @@ fn main() {
     println!("reference count = {}", Rc::strong_count(&sun)); // 4 references
 
     // TODO
+    drop(earth);
     println!("reference count = {}", Rc::strong_count(&sun)); // 3 references
 
     // TODO
+    drop(venus);
     println!("reference count = {}", Rc::strong_count(&sun)); // 2 references
 
     // TODO
+    drop(mercury);
     println!("reference count = {}", Rc::strong_count(&sun)); // 1 reference
 
     assert_eq!(Rc::strong_count(&sun), 1);

exercises/threads/threads3.rs

@@ -60,6 +60,9 @@ fn main() {
     for received in rx {
         println!("Got: {}", received);
         total_received += 1;
+        if total_received >= queue_length{
+            break;
+        }
     }
 
     println!("total numbers received: {}", total_received);