Merge pull request #4 from cgM82589933/day3

day3 (still working but figured it was a good time to merge to main)

exercises/enums/enums1.rs

@@ -1,11 +1,13 @@
 // enums1.rs
 // Make me compile! Execute `rustlings hint enums1` for hints!
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 enum Message {
     // TODO: define a few types of messages as used below
+    Quit,
+    Echo,
+    Move,
+    ChangeColor,
 }
 
 fn main() {

exercises/enums/enums2.rs

@@ -1,11 +1,13 @@
 // enums2.rs
 // Make me compile! Execute `rustlings hint enums2` for hints!
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 enum Message {
     // TODO: define the different variants used below
+    Move { x: i32, y: i32 },
+    Echo(String),
+    ChangeColor(u8, u8, u8),
+    Quit,
 }
 
 impl Message {

exercises/enums/enums3.rs

@@ -1,10 +1,18 @@
 // enums3.rs
 // Address all the TODOs to make the tests pass!
 
-// I AM NOT DONE
-
 enum Message {
     // TODO: implement the message variant types based on their usage below
+    // // solution0
+    // ChangeColor((u8, u8, u8)),
+    // Echo(String),
+    // Move(Point),
+    // Quit,
+    // solution1
+    ChangeColor { color: (u8, u8, u8) },
+    Echo { s: String },
+    Move { p: Point },
+    Quit,
 }
 
 struct Point {
@@ -37,6 +45,18 @@ impl State {
 
     fn process(&mut self, message: Message) {
         // TODO: create a match expression to process the different message variants
+        match message {
+            // // solution0
+            // Message::ChangeColor((r, g, b)) => self.change_color((r, g, b)),
+            // Message::Echo(s) => self.echo(s),
+            // Message::Move(p) => self.move_position(p),
+            // Message::Quit => self.quit(),
+            // solution1
+            Message::ChangeColor { color } => self.change_color(color),
+            Message::Echo { s } => self.echo(s),
+            Message::Move { p } => self.move_position(p),
+            Message::Quit => self.quit(),
+        }
     }
 }
 
@@ -51,9 +71,21 @@ mod tests {
             position: Point { x: 0, y: 0 },
             color: (0, 0, 0),
         };
-        state.process(Message::ChangeColor((255, 0, 255)));
+        // // solution0
-        state.process(Message::Echo(String::from("hello world")));
+        // state.process(Message::ChangeColor((255, 0, 255)));
-        state.process(Message::Move(Point { x: 10, y: 15 }));
+        // state.process(Message::Echo(String::from("hello world")));
+        // state.process(Message::Move(Point { x: 10, y: 15 }));
+        // state.process(Message::Quit);
+        // solution1
+        state.process(Message::ChangeColor {
+            color: (255, 0, 255),
+        });
+        state.process(Message::Echo {
+            s: String::from("hello world"),
+        });
+        state.process(Message::Move {
+            p: Point { x: 10, y: 15 },
+        });
         state.process(Message::Quit);
 
         assert_eq!(state.color, (255, 0, 255));

exercises/modules/modules1.rs

@@ -1,15 +1,13 @@
 // modules1.rs
 // Make me compile! Execute `rustlings hint modules1` for hints :)
 
-// I AM NOT DONE
-
 mod sausage_factory {
     // Don't let anybody outside of this module see this!
     fn get_secret_recipe() -> String {
         String::from("Ginger")
     }
 
-    fn make_sausage() {
+    pub fn make_sausage() {
         get_secret_recipe();
         println!("sausage!");
     }

exercises/modules/modules2.rs

@@ -3,13 +3,11 @@
 // 'use' and 'as' keywords. Fix these 'use' statements to make the code compile.
 // Make me compile! Execute `rustlings hint modules2` for hints :)
 
-// I AM NOT DONE
-
 mod delicious_snacks {
 
     // TODO: Fix these use statements
-    use self::fruits::PEAR as ???
+    pub use self::fruits::PEAR as fruit;
-    use self::veggies::CUCUMBER as ???
+    pub use self::veggies::CUCUMBER as veggie;
 
     mod fruits {
         pub const PEAR: &'static str = "Pear";

exercises/modules/modules3.rs

@@ -5,10 +5,13 @@
 // from the std::time module. Bonus style points if you can do it with one line!
 // Make me compile! Execute `rustlings hint modules3` for hints :)
 
-// I AM NOT DONE
-
 // TODO: Complete this use statement
-use ???
+// solution0
+// use std::time::SystemTime;
+// use std::time::UNIX_EPOCH;
+// solution1
+// use unix shell-style glob pattern matching
+use std::time::{SystemTime, UNIX_EPOCH};
 
 fn main() {
     match SystemTime::now().duration_since(UNIX_EPOCH) {

exercises/move_semantics/move_semantics4.rs

@@ -4,12 +4,35 @@
 // freshly created vector from fill_vec to its caller.
 // Execute `rustlings hint move_semantics4` for hints!
 
-// I AM NOT DONE
+// // original code
+// fn main() {
+//     let vec0 = Vec::new();
 
+//     let mut vec1 = fill_vec(vec0);
+
+//     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+
+//     vec1.push(88);
+
+//     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
+// }
+
+// // original code (cont'd)
+// // `fill_vec()` no longer takes `vec: Vec<i32>` as argument
+// fn fill_vec() -> Vec<i32> {
+//     let mut vec = vec;
+
+//     vec.push(22);
+//     vec.push(44);
+//     vec.push(66);
+
+//     vec
+// }
+// // end of original code
+
+// solution
 fn main() {
-    let vec0 = Vec::new();
+    let mut vec1 = fill_vec();
-
-    let mut vec1 = fill_vec(vec0);
 
     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
 
@@ -18,9 +41,11 @@ fn main() {
     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
 }
 
+// solution (cont'd)
 // `fill_vec()` no longer takes `vec: Vec<i32>` as argument
 fn fill_vec() -> Vec<i32> {
-    let mut vec = vec;
+    // create mutable vec
+    let mut vec = Vec::new();
 
     vec.push(22);
     vec.push(44);
@@ -28,3 +53,4 @@ fn fill_vec() -> Vec<i32> {
 
     vec
 }
+// end of solution

exercises/move_semantics/move_semantics5.rs

@@ -3,13 +3,23 @@
 // adding, changing or removing any of them.
 // Execute `rustlings hint move_semantics5` for hints :)
 
-// I AM NOT DONE
+// // original code
+// fn main() {
+//     let mut x = 100;
+//     let y = &mut x;
+//     let z = &mut x;
+//     *y += 100;
+//     *z += 1000;
+//     assert_eq!(x, 1200);
+// }
+// // end of orignal code
 
+// solution
 fn main() {
     let mut x = 100;
     let y = &mut x;
-    let z = &mut x;
     *y += 100;
+    let z = &mut x;
     *z += 1000;
     assert_eq!(x, 1200);
 }

exercises/move_semantics/move_semantics6.rs

@@ -2,24 +2,55 @@
 // Make me compile! `rustlings hint move_semantics6` for hints
 // You can't change anything except adding or removing references
 
-// I AM NOT DONE
+// // original code
+// fn main() {
+//     let data = "Rust is great!".to_string();
 
+//     get_char(data);
+
+//     string_uppercase(&data);
+// }
+
+// // original code (cont'd)
+// // Should not take ownership
+// fn get_char(data: String) -> char {
+//     data.chars().last().unwrap()
+// }
+
+// // original code (cont'd)
+// // Should take ownership
+// fn string_uppercase(mut data: &String) {
+//     data = &data.to_uppercase();
+
+//     println!("{}", data);
+// }
+// // end of original code
+
+// solution
 fn main() {
     let data = "Rust is great!".to_string();
 
-    get_char(data);
+    // change passed data to ref so as to not take ownership of `data`
+    get_char(&data);
 
-    string_uppercase(&data);
+    // remove ref so string_uppercase takes ownership of `data`
+    string_uppercase(data);
 }
 
+// solution (cont'd)
 // Should not take ownership
-fn get_char(data: String) -> char {
+// add ref to argument type
+fn get_char(data: &String) -> char {
     data.chars().last().unwrap()
 }
 
+// solution (cont'd)
 // Should take ownership
-fn string_uppercase(mut data: &String) {
+// remove ref from argument type
-    data = &data.to_uppercase();
+fn string_uppercase(mut data: String) {
+    // remove ref from data
+    data = data.to_uppercase();
 
     println!("{}", data);
 }
+// end of solution

exercises/primitive_types/primitive_types1.rs

@@ -2,17 +2,15 @@
 // Fill in the rest of the line that has code missing!
 // No hints, there's no tricks, just get used to typing these :)
 
-// I AM NOT DONE
-
 fn main() {
     // Booleans (`bool`)
 
-    let is_morning = true;
+    let is_morning: bool = true;
     if is_morning {
         println!("Good morning!");
     }
 
-    let // Finish the rest of this line like the example! Or make it be false!
+    let is_evening: bool = true; // Finish the rest of this line like the example! Or make it be false!
     if is_evening {
         println!("Good evening!");
     }

exercises/primitive_types/primitive_types2.rs

@@ -2,12 +2,10 @@
 // Fill in the rest of the line that has code missing!
 // No hints, there's no tricks, just get used to typing these :)
 
-// I AM NOT DONE
-
 fn main() {
     // Characters (`char`)
 
-    let my_first_initial = 'C';
+    let my_first_initial: char = 'C';
     if my_first_initial.is_alphabetic() {
         println!("Alphabetical!");
     } else if my_first_initial.is_numeric() {
@@ -16,9 +14,9 @@ fn main() {
         println!("Neither alphabetic nor numeric!");
     }
 
-    let // Finish this line like the example! What's your favorite character?
+    let your_character: char = '1'; // Finish this line like the example! What's your favorite character?
-    // Try a letter, try a number, try a special character, try a character
+                                    // Try a letter, try a number, try a special character, try a character
-    // from a different language than your own, try an emoji!
+                                    // from a different language than your own, try an emoji!
     if your_character.is_alphabetic() {
         println!("Alphabetical!");
     } else if your_character.is_numeric() {

exercises/primitive_types/primitive_types3.rs

@@ -2,10 +2,8 @@
 // Create an array with at least 100 elements in it where the ??? is.
 // Execute `rustlings hint primitive_types3` for hints!
 
-// I AM NOT DONE
-
 fn main() {
-    let a = ???
+    let a = [0; 100];
 
     if a.len() >= 100 {
         println!("Wow, that's a big array!");

exercises/primitive_types/primitive_types4.rs

@@ -2,13 +2,25 @@
 // Get a slice out of Array a where the ??? is so that the test passes.
 // Execute `rustlings hint primitive_types4` for hints!!
 
-// I AM NOT DONE
+// // original code
+// #[test]
+// fn slice_out_of_array() {
+//     let a = [1, 2, 3, 4, 5];
 
+//     let nice_slice = ???
+
+//     assert_eq!([2, 3, 4], nice_slice)
+// }
+// // end of original code
+
+// solution
 #[test]
 fn slice_out_of_array() {
     let a = [1, 2, 3, 4, 5];
 
-    let nice_slice = ???
+    // create slice from borrowed array `a`
+    let nice_slice = &a[1..4];
 
     assert_eq!([2, 3, 4], nice_slice)
 }
+// end of solution

exercises/primitive_types/primitive_types5.rs

@@ -2,11 +2,9 @@
 // Destructure the `cat` tuple so that the println will work.
 // Execute `rustlings hint primitive_types5` for hints!
 
-// I AM NOT DONE
-
 fn main() {
     let cat = ("Furry McFurson", 3.5);
-    let /* your pattern here */ = cat;
+    let (name, age)/* your pattern here */ = cat;
 
     println!("{} is {} years old.", name, age);
 }

exercises/primitive_types/primitive_types6.rs

@@ -3,14 +3,12 @@
 // You can put the expression for the second element where ??? is so that the test passes.
 // Execute `rustlings hint primitive_types6` for hints!
 
-// I AM NOT DONE
-
 #[test]
 fn indexing_tuple() {
     let numbers = (1, 2, 3);
     // Replace below ??? with the tuple indexing syntax.
-    let second = ???;
+    // let second = ???;
+    let second = numbers.1;
 
-    assert_eq!(2, second,
+    assert_eq!(2, second, "This is not the 2nd number in the tuple!")
-        "This is not the 2nd number in the tuple!")
 }

exercises/structs/structs1.rs

@@ -1,13 +1,13 @@
 // structs1.rs
 // Address all the TODOs to make the tests pass!
 
-// I AM NOT DONE
-
 struct ColorClassicStruct {
     // TODO: Something goes here
+    name: String,
+    hex: String,
 }
 
-struct ColorTupleStruct(/* TODO: Something goes here */);
+struct ColorTupleStruct(String, String /* TODO: Something goes here */);
 
 #[derive(Debug)]
 struct UnitStruct;
@@ -19,7 +19,10 @@ mod tests {
     #[test]
     fn classic_c_structs() {
         // TODO: Instantiate a classic c struct!
-        // let green =
+        let green = ColorClassicStruct {
+            name: String::from("green"),
+            hex: String::from("#00FF00"),
+        };
 
         assert_eq!(green.name, "green");
         assert_eq!(green.hex, "#00FF00");
@@ -28,7 +31,7 @@ mod tests {
     #[test]
     fn tuple_structs() {
         // TODO: Instantiate a tuple struct!
-        // let green =
+        let green = ColorTupleStruct(String::from("green"), String::from("#00FF00"));
 
         assert_eq!(green.0, "green");
         assert_eq!(green.1, "#00FF00");
@@ -37,7 +40,7 @@ mod tests {
     #[test]
     fn unit_structs() {
         // TODO: Instantiate a unit struct!
-        // let unit_struct =
+        let unit_struct = UnitStruct;
         let message = format!("{:?}s are fun!", unit_struct);
 
         assert_eq!(message, "UnitStructs are fun!");

exercises/structs/structs2.rs

@@ -1,8 +1,6 @@
 // structs2.rs
 // Address all the TODOs to make the tests pass!
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 struct Order {
     name: String,
@@ -34,7 +32,12 @@ mod tests {
     fn your_order() {
         let order_template = create_order_template();
         // TODO: Create your own order using the update syntax and template above!
-        // let your_order =
+        let your_order = Order {
+            name: String::from("Hacker in Rust"),
+            count: 1,
+            ..order_template
+        };
+
         assert_eq!(your_order.name, "Hacker in Rust");
         assert_eq!(your_order.year, order_template.year);
         assert_eq!(your_order.made_by_phone, order_template.made_by_phone);

exercises/structs/structs3.rs

@@ -4,8 +4,6 @@
 // Make the code compile and the tests pass!
 // If you have issues execute `rustlings hint structs3`
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 struct Package {
     sender_country: String,
@@ -17,6 +15,7 @@ impl Package {
     fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
         if weight_in_grams <= 0 {
             // panic statement goes here...
+            panic!("Panic!")
         } else {
             Package {
                 sender_country,
@@ -26,12 +25,14 @@ impl Package {
         }
     }
 
-    fn is_international(&self) -> ??? {
+    fn is_international(&self) -> bool {
         // Something goes here...
+        self.sender_country.ne(&self.recipient_country)
     }
 
-    fn get_fees(&self, cents_per_gram: i32) -> ??? {
+    fn get_fees(&self, cents_per_gram: i32) -> i32 {
         // Something goes here...
+        cents_per_gram * self.weight_in_grams
     }
 }