practice rust

exercises/collections/hashmap1.rs

@@ -11,17 +11,18 @@
 // Execute the command `rustlings hint hashmap1` if you need
 // hints.
 
-// I AM NOT DONE
-
 use std::collections::HashMap;
 
 fn fruit_basket() -> HashMap<String, u32> {
-    let mut basket = // TODO: declare your hash map here.
+    let mut basket = HashMap::new();// TODO: declare your hash map here.
 
     // Two bananas are already given for you :)
     basket.insert(String::from("banana"), 2);
 
     // TODO: Put more fruits in your basket here.
+    basket.insert(String::from("apple"), 12);
+    basket.insert(String::from("pear"), 22);
+    basket.insert(String::from("orange"), 32);
 
     basket
 }

exercises/collections/hashmap2.rs

@@ -12,11 +12,9 @@
 // Execute the command `rustlings hint hashmap2` if you need
 // hints.
 
-// I AM NOT DONE
-
 use std::collections::HashMap;
 
-#[derive(Hash, PartialEq, Eq)]
+#[derive(Hash, PartialEq, Eq, Debug)]
 enum Fruit {
     Apple,
     Banana,
@@ -38,6 +36,7 @@ fn fruit_basket(basket: &mut HashMap<Fruit, u32>) {
         // TODO: Put new fruits if not already present. Note that you
         // are not allowed to put any type of fruit that's already
         // present!
+        basket.entry(fruit).or_insert(50);
     }
 }
 
@@ -50,14 +49,15 @@ mod tests {
         basket.insert(Fruit::Apple, 4);
         basket.insert(Fruit::Mango, 2);
         basket.insert(Fruit::Lychee, 5);
-
         basket
     }
 
     #[test]
     fn test_given_fruits_are_not_modified() {
+       
         let mut basket = get_fruit_basket();
         fruit_basket(&mut basket);
+        println!("t1 {:?}", &basket);
         assert_eq!(*basket.get(&Fruit::Apple).unwrap(), 4);
         assert_eq!(*basket.get(&Fruit::Mango).unwrap(), 2);
         assert_eq!(*basket.get(&Fruit::Lychee).unwrap(), 5);

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)
 }
@@ -16,7 +14,6 @@ fn array_and_vec() -> ([i32; 4], Vec<i32>) {
 #[cfg(test)]
 mod tests {
     use super::*;
-
     #[test]
     fn test_array_and_vec_similarity() {
         let (a, v) = array_and_vec();

exercises/collections/vec2.rs

@@ -7,12 +7,11 @@
 // 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*=2;
     }
 
     // At this point, `v` should be equal to [4, 8, 12, 16, 20].

exercises/enums/enums1.rs

@@ -1,11 +1,10 @@
 // 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 +1,12 @@
 // 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
+    Quit,
+    Move { x: i32, y: i32 },
+    Echo(String),
+    ChangeColor(u32, u32, u32)
 }
 
 impl Message {

exercises/enums/enums3.rs

@@ -1,10 +1,11 @@
 // 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
+    Quit,
+    Move { x: u8, y: u8 },
+    Echo(String),
+    ChangeColor((u8, u8, u8)),
 }
 
 struct Point {
@@ -37,6 +38,12 @@ impl State {
 
     fn process(&mut self, message: Message) {
         // TODO: create a match expression to process the different message variants
+        match message {
+            Message::Quit => self.quit(),
+            Message::Move { x, y } => self.move_position(Point { x, y }),
+            Message::Echo(cad) => self.echo(cad),
+            Message::ChangeColor(col) => self.change_color(col),
+        }
     }
 }
 
@@ -53,7 +60,7 @@ mod tests {
         };
         state.process(Message::ChangeColor((255, 0, 255)));
         state.process(Message::Echo(String::from("hello world")));
-        state.process(Message::Move(Point { x: 10, y: 15 }));
+        state.process(Message::Move { x: 10, y: 15 });
         state.process(Message::Quit);
 
         assert_eq!(state.color, (255, 0, 255));

exercises/error_handling/errors1.rs

@@ -6,7 +6,6 @@
 // this function to have.
 // Execute `rustlings hint errors1` for hints!
 
-// I AM NOT DONE
 
 pub fn generate_nametag_text(name: String) -> Option<String> {
     if name.len() > 0 {

exercises/error_handling/errors2.rs

@@ -16,7 +16,6 @@
 // There are at least two ways to implement this that are both correct-- but
 // one is a lot shorter! Execute `rustlings hint errors2` for hints to both ways.
 
-// I AM NOT DONE
 
 use std::num::ParseIntError;
 
@@ -24,8 +23,18 @@ pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {
     let processing_fee = 1;
     let cost_per_item = 5;
     let qty = item_quantity.parse::<i32>();
+    match qty {
+        Ok(qty) => Ok(qty *cost_per_item + processing_fee),
+        Err(error) => Err(error),
+    }
+   
+}
 
-    Ok(qty * cost_per_item + processing_fee)
+pub fn total_cost_simple(item_quantity: &str) -> Result<i32, ParseIntError> {
+    let processing_fee = 1;
+    let cost_per_item = 5;
+    let qty = item_quantity.parse::<i32>()?;
+    Ok(qty *cost_per_item + processing_fee) 
 }
 
 #[cfg(test)]
@@ -44,4 +53,18 @@ mod tests {
             "invalid digit found in string"
         );
     }
+
+    #[test]
+    fn item_quantity_is_a_valid_number_2() {
+        assert_eq!(total_cost_simple("34"), Ok(171));
+    }
+
+    #[test]
+    fn item_quantity_is_an_invalid_number_2() {
+        assert_eq!(
+            total_cost_simple("beep boop").unwrap_err().to_string(),
+            "invalid digit found in string"
+        );
+    }
+
 }

exercises/error_handling/errors3.rs

@@ -4,7 +4,7 @@
 // Why not? What should we do to fix it?
 // Execute `rustlings hint errors3` for hints!
 
-// I AM NOT DONE
+// because main function do not returns Result or Option or another type that implements std::ops::Try
 
 use std::num::ParseIntError;
 
@@ -12,14 +12,20 @@ fn main() {
     let mut tokens = 100;
     let pretend_user_input = "8";
 
-    let cost = total_cost(pretend_user_input)?;
+    let cost = total_cost(pretend_user_input);
 
-    if cost > tokens {
+    match cost {
-        println!("You can't afford that many!");
+        Ok(cost) => {
-    } else {
+            if cost > tokens {
-        tokens -= cost;
+                println!("You can't afford that many!");
-        println!("You now have {} tokens.", tokens);
+            } else {
+                tokens -= cost;
+                println!("You now have {} tokens.", tokens);
+            }
+        },
+        Err(e) => println!("Noooooo")
     }
+    
 }
 
 pub fn total_cost(item_quantity: &str) -> Result<i32, ParseIntError> {

exercises/error_handling/errors4.rs

@@ -1,8 +1,6 @@
 // errors4.rs
 // Make this test pass! Execute `rustlings hint errors4` for hints :)
 
-// I AM NOT DONE
-
 #[derive(PartialEq, Debug)]
 struct PositiveNonzeroInteger(u64);
 
@@ -14,7 +12,16 @@ enum CreationError {
 
 impl PositiveNonzeroInteger {
     fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
-        Ok(PositiveNonzeroInteger(value as u64))
+        // Ok(PositiveNonzeroInteger(value as u64))
+
+        if value > 0 {
+            Ok(PositiveNonzeroInteger(value as u64))
+        } else if value < 0 {
+            Err(CreationError::Negative)
+        } else {
+            Err(CreationError::Zero)
+        }
+        
     }
 }
 

exercises/error_handling/errors5.rs

@@ -4,14 +4,15 @@
 // It won't compile right now! Why?
 // Execute `rustlings hint errors5` for hints!
 
-// I AM NOT DONE
-
 use std::error;
+use std::error::Error;
 use std::fmt;
-use std::num::ParseIntError;
+//use std::num::ParseIntError;
 
 // TODO: update the return type of `main()` to make this compile.
-fn main() -> Result<(), ParseIntError> {
+//fn main() -> Result<(), ParseIntError> {
+fn main() -> Result<(),  Box<dyn Error>> {
+
     let pretend_user_input = "42";
     let x: i64 = pretend_user_input.parse()?;
     println!("output={:?}", PositiveNonzeroInteger::new(x)?);

exercises/error_handling/errors6.rs

@@ -26,14 +26,15 @@ impl ParsePosNonzeroError {
     // TODO: add another error conversion function here.
 }
 
-fn parse_pos_nonzero(s: &str)
+fn parse_pos_nonzero(s: &str) -> Result<PositiveNonzeroInteger, ParsePosNonzeroError> {
-    -> Result<PositiveNonzeroInteger, ParsePosNonzeroError>
-{
     // TODO: change this to return an appropriate error instead of panicking
     // when `parse()` returns an error.
     let x: i64 = s.parse().unwrap();
-    PositiveNonzeroInteger::new(x)
+    match x {
-        .map_err(ParsePosNonzeroError::from_creation)
+        Err(e) => ParsePosNonzeroError::,
+        Ok(x) => Ok(PositiveNonzeroInteger::new(x).map_err(ParsePosNonzeroError::from_creation))
+    }
+    
 }
 
 // Don't change anything below this line.

exercises/functions/functions1.rs

@@ -1,8 +1,11 @@
 // functions1.rs
 // Make me compile! Execute `rustlings hint functions1` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
     call_me();
 }
+
+
+fn call_me() {
+
+}

exercises/functions/functions2.rs

@@ -1,13 +1,11 @@
 // functions2.rs
 // Make me compile! Execute `rustlings hint functions2` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
     call_me(3);
 }
 
-fn call_me(num:) {
+fn call_me(num:i8) {
     for i in 0..num {
         println!("Ring! Call number {}", i + 1);
     }

exercises/functions/functions3.rs

@@ -1,10 +1,8 @@
 // functions3.rs
 // Make me compile! Execute `rustlings hint functions3` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
-    call_me();
+    call_me(14);
 }
 
 fn call_me(num: u32) {

exercises/functions/functions4.rs

@@ -4,14 +4,12 @@
 // This store is having a sale where if the price is an even number, you get
 // 10 Rustbucks off, but if it's an odd number, it's 3 Rustbucks off.
 
-// I AM NOT DONE
-
 fn main() {
-    let original_price = 51;
+    let original_price:i32 = 51;
     println!("Your sale price is {}", sale_price(original_price));
 }
-
+ 
-fn sale_price(price: i32) -> {
+fn sale_price(price: i32) -> i32 {
     if is_even(price) {
         price - 10
     } else {

exercises/functions/functions5.rs

@@ -1,13 +1,11 @@
 // functions5.rs
 // Make me compile! Execute `rustlings hint functions5` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
-    let answer = square(3);
+    let answer:i32 = square(3);
     println!("The answer is {}", answer);
 }
 
 fn square(num: i32) -> i32 {
-    num * num;
+    return num * num;
 }

exercises/if/if1.rs

@@ -1,13 +1,16 @@
 // if1.rs
 
-// I AM NOT DONE
-
 pub fn bigger(a: i32, b: i32) -> i32 {
     // Complete this function to return the bigger number!
     // Do not use:
     // - another function call
     // - additional variables
     // Execute `rustlings hint if1` for hints
+    if a > b {
+        a
+    } else {
+        b
+    }
 }
 
 // Don't mind this for now :)

exercises/if/if2.rs

@@ -4,13 +4,13 @@
 // Step 2: Get the bar_for_fuzz and default_to_baz tests passing!
 // Execute the command `rustlings hint if2` if you want a hint :)
 
-// I AM NOT DONE
-
 pub fn fizz_if_foo(fizzish: &str) -> &str {
     if fizzish == "fizz" {
         "foo"
+    } else if fizzish == "fuzz" {
+        "bar"
     } else {
-        1
+        "baz"
     }
 }
 

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 +5,8 @@
 // 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 ???
+use std::time::{SystemTime, UNIX_EPOCH};
 
 fn main() {
     match SystemTime::now().duration_since(UNIX_EPOCH) {

exercises/move_semantics/move_semantics1.rs

@@ -1,18 +1,19 @@
 // move_semantics1.rs
 // Make me compile! Execute `rustlings hint move_semantics1` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
     let vec0 = Vec::new();
 
-    let vec1 = fill_vec(vec0);
+    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);
+    
+    //esto no lo puedo hacer pq fill_vec() vec0 se ha movido a otra var, y en consecencia no existe ya vec0
+    //println!("{} has length {} content `{:?}`", "vec", vec0.len(), vec0);
 }
 
 fn fill_vec(vec: Vec<i32>) -> Vec<i32> {

exercises/move_semantics/move_semantics2.rs

@@ -2,27 +2,22 @@
 // Make me compile without changing line 13!
 // Execute `rustlings hint move_semantics2` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
-    let vec0 = Vec::new();
+    let mut vec0 = Vec::new();
+    //let vec0 = vec![1, 2, 3];
+    vec0.push(11);
+    vec0.push(33);
+    vec0.push(55);
 
-    let mut vec1 = fill_vec(vec0);
+    fill_vec(&mut vec0); //mutable reference
 
     // Do not change the following line!
     println!("{} has length {} content `{:?}`", "vec0", vec0.len(), vec0);
 
-    vec1.push(88);
-
-    println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
 }
 
-fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
+fn fill_vec(vec: &mut Vec<i32>) {
-    let mut vec = vec;
-
     vec.push(22);
     vec.push(44);
     vec.push(66);
-
-    vec
 }

exercises/move_semantics/move_semantics3.rs

@@ -3,21 +3,19 @@
 // (no lines with multiple semicolons necessary!)
 // Execute `rustlings hint move_semantics3` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
-    let vec0 = Vec::new();
+    let mut vec0 = Vec::new();
 
     let mut vec1 = fill_vec(vec0);
 
     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
-
+    // ya no existe vec0, movido
     vec1.push(88);
 
     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
 }
 
-fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
+fn fill_vec(mut vec: Vec<i32>) -> Vec<i32> {
     vec.push(22);
     vec.push(44);
     vec.push(66);

exercises/move_semantics/move_semantics4.rs

@@ -4,12 +4,10 @@
 // freshly created vector from fill_vec to its caller.
 // Execute `rustlings hint move_semantics4` for hints!
 
-// I AM NOT DONE
-
 fn main() {
-    let vec0 = Vec::new();
+   
 
-    let mut vec1 = fill_vec(vec0);
+    let mut vec1: Vec<i32> = fill_vec();
 
     println!("{} has length {} content `{:?}`", "vec1", vec1.len(), vec1);
 
@@ -20,7 +18,7 @@ fn main() {
 
 // `fill_vec()` no longer takes `vec: Vec<i32>` as argument
 fn fill_vec() -> Vec<i32> {
-    let mut vec = vec;
+    let mut vec = Vec::new();
 
     vec.push(22);
     vec.push(44);

exercises/move_semantics/move_semantics5.rs

@@ -3,13 +3,14 @@
 // adding, changing or removing any of them.
 // Execute `rustlings hint move_semantics5` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
     let mut x = 100;
     let y = &mut x;
+   
+    *y += 100;   //suma 100 a x, x=200
+
     let z = &mut x;
-    *y += 100;
+    *z += 1000; //suma 1000 a x, x=1200
-    *z += 1000;
+    
     assert_eq!(x, 1200);
 }

exercises/primitive_types/primitive_types1.rs

@@ -2,8 +2,6 @@
 // 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`)
 
@@ -12,7 +10,7 @@ fn main() {
         println!("Good morning!");
     }
 
-    let // Finish the rest of this line like the example! Or make it be false!
+    let is_evening = false; // 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

@@ -2,8 +2,6 @@
 // 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`)
 
@@ -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 = '-'; // 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 +2,9 @@
 // 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 +2,16 @@
 // 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
-
 #[test]
 fn slice_out_of_array() {
     let a = [1, 2, 3, 4, 5];
 
-    let nice_slice = ???
+    let nice_slice = &a[1..4];
 
-    assert_eq!([2, 3, 4], nice_slice)
+    assert_eq!([2, 3, 4], nice_slice);
+
+    let x = ['a','e','i','o','u'];
+    assert_eq!(['a'], &x[0..1]);
+
+    assert_eq!(['o','u'], &x[3..5]);
 }

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) = cat;
 
     println!("{} is {} years old.", name, age);
 }

exercises/primitive_types/primitive_types6.rs

@@ -3,13 +3,11 @@
 // 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 = numbers.1;
 
     assert_eq!(2, second,
         "This is not the 2nd number in the tuple!")

exercises/quiz1.rs

@@ -7,10 +7,15 @@
 // more than 40 at once, each apple only costs 1! Write a function that calculates
 // the price of an order of apples given the quantity bought. No hints this time!
 
-// I AM NOT DONE
-
 // Put your function here!
-// fn calculate_apple_price {
+const APPLE_PRICE:i32 = 2;
+fn calculate_apple_price (cant:i32) -> i32 {
+    if cant > 40 {
+        1 * cant
+    } else {
+        APPLE_PRICE * cant
+    }
+}
 
 // Don't modify this function!
 #[test]

exercises/quiz2.rs

@@ -7,8 +7,6 @@
 // you think each value is. That is, add either `string_slice` or `string`
 // before the parentheses on each line. If you're right, it will compile!
 
-// I AM NOT DONE
-
 fn string_slice(arg: &str) {
     println!("{}", arg);
 }
@@ -17,14 +15,14 @@ fn string(arg: String) {
 }
 
 fn main() {
-    ???("blue");
+    string_slice("blue");
-    ???("red".to_string());
+    string("red".to_string());
-    ???(String::from("hi"));
+    string(String::from("hi"));
-    ???("rust is fun!".to_owned());
+    string("rust is fun!".to_owned());
-    ???("nice weather".into());
+    string("nice weather".into());
-    ???(format!("Interpolation {}", "Station"));
+    string(format!("Interpolation {}", "Station"));
-    ???(&String::from("abc")[0..1]);
+    string_slice(&String::from("abc")[0..1]);
-    ???("  hello there ".trim());
+    string_slice("  hello there ".trim());
-    ???("Happy Monday!".to_string().replace("Mon", "Tues"));
+    string("Happy Monday!".to_string().replace("Mon", "Tues"));
-    ???("mY sHiFt KeY iS sTiCkY".to_lowercase());
+    string("mY sHiFt KeY iS sTiCkY".to_lowercase());
 }

exercises/strings/strings1.rs

@@ -2,13 +2,11 @@
 // Make me compile without changing the function signature!
 // Execute `rustlings hint strings1` for hints ;)
 
-// I AM NOT DONE
-
 fn main() {
     let answer = current_favorite_color();
     println!("My current favorite color is {}", answer);
 }
 
 fn current_favorite_color() -> String {
-    "blue"
+    "blue".to_string()
 }

exercises/strings/strings2.rs

@@ -2,15 +2,21 @@
 // Make me compile without changing the function signature!
 // Execute `rustlings hint strings2` for hints :)
 
-// I AM NOT DONE
-
 fn main() {
-    let word = String::from("green"); // Try not changing this line :)
+    let mut word = String::from("green"); // Try not changing this line :)
-    if is_a_color_word(word) {
+    if is_a_color_word(&word) {
-        println!("That is a color word I know!");
+        println!("That is a color word ({}) I know!", &word);
     } else {
         println!("That is not a color word I know.");
     }
+
+    word = String::from("red");
+    if is_a_color_word(&word) {
+        println!("That is a color word ({}) I know!", &word);
+    } else {
+        println!("That is not a color word I know.");
+    }
+
 }
 
 fn is_a_color_word(attempt: &str) -> bool {

exercises/structs/structs1.rs

@@ -1,13 +1,12 @@
 // 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);
 
 #[derive(Debug)]
 struct UnitStruct;
@@ -19,7 +18,10 @@ mod tests {
     #[test]
     fn classic_c_structs() {
         // TODO: Instantiate a classic c struct!
-        // let green =
+        let green = ColorClassicStruct {
+            name: "green".to_string(),
+            hex: "#00FF00".to_string()
+        };
 
         assert_eq!(green.name, "green");
         assert_eq!(green.hex, "#00FF00");
@@ -28,7 +30,7 @@ mod tests {
     #[test]
     fn tuple_structs() {
         // TODO: Instantiate a tuple struct!
-        // let green =
+        let green = ColorTupleStruct ("green".to_string(), "#00FF00".to_string());
 
         assert_eq!(green.0, "green");
         assert_eq!(green.1, "#00FF00");
@@ -37,7 +39,7 @@ 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 +32,18 @@ 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 mut your_order = Order {
+            //name: String::from("Hacker in Rust"), 
+            name: "Hacker in Rust".to_string(),
+            count: 1,
+            year: order_template.year,
+            // made_by_phone: order_template.made_by_phone,
+            // made_by_mobile: order_template.made_by_mobile,
+            // made_by_email: order_template.made_by_email,
+            // item_number: order_template.item_number,
+            ..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,
@@ -16,7 +14,7 @@ struct Package {
 impl Package {
     fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
         if weight_in_grams <= 0 {
-            // Something goes here...
+            panic!("crash and burn");
         } else {
             return Package {
                 sender_country,
@@ -26,12 +24,12 @@ impl Package {
         }
     }
 
-    fn is_international(&self) -> ??? {
+    fn is_international(&self) -> bool {
-        // Something goes here...
+        self.sender_country != self.recipient_country
     }
 
-    fn get_fees(&self, cents_per_gram: i32) -> ??? {
+    fn get_fees(&self, cents_per_gram: i32) -> i32 {
-        // Something goes here...
+        self.weight_in_grams * cents_per_gram
     }
 }
 
@@ -73,7 +71,7 @@ mod tests {
         let sender_country = String::from("Spain");
         let recipient_country = String::from("Spain");
 
-        let cents_per_gram = ???;
+        let cents_per_gram = 3;
 
         let package = Package::new(sender_country, recipient_country, 1500);
 

exercises/variables/variables1.rs

@@ -6,9 +6,7 @@
 // even after you already figured it out. If you got everything working and
 // feel ready for the next exercise, remove the `I AM NOT DONE` comment below.
 
-// I AM NOT DONE
-
 fn main() {
-    x = 5;
+    let x = 5;
     println!("x has the value {}", x);
 }

exercises/variables/variables2.rs

@@ -1,10 +1,9 @@
 // variables2.rs
 // Make me compile! Execute the command `rustlings hint variables2` if you want a hint :)
 
-// I AM NOT DONE
 
 fn main() {
-    let x;
+    let x:i32 = 9;
     if x == 10 {
         println!("Ten!");
     } else {

exercises/variables/variables3.rs

@@ -1,10 +1,8 @@
 // variables3.rs
 // Make me compile! Execute the command `rustlings hint variables3` if you want a hint :)
 
-// I AM NOT DONE
-
 fn main() {
-    let x = 3;
+    let mut x:i8 = 3;
     println!("Number {}", x);
     x = 5; // don't change this line
     println!("Number {}", x);

exercises/variables/variables4.rs

@@ -1,9 +1,7 @@
 // variables4.rs
 // Make me compile! Execute the command `rustlings hint variables4` if you want a hint :)
 
-// I AM NOT DONE
-
 fn main() {
-    let x: i32;
+    let x: i32=989898;
     println!("Number {}", x);
 }

exercises/variables/variables5.rs

@@ -1,11 +1,9 @@
 // variables5.rs
 // Make me compile! Execute the command `rustlings hint variables5` if you want a hint :)
 
-// I AM NOT DONE
-
 fn main() {
     let number = "T-H-R-E-E"; // don't change this line
     println!("Spell a Number : {}", number);
-    number = 3;
+    let number = 3;
     println!("Number plus two is : {}", number + 2);
 }

exercises/variables/variables6.rs

@@ -1,9 +1,7 @@
 // variables6.rs
 // Make me compile! Execute the command `rustlings hint variables6` if you want a hint :)
 
-// I AM NOT DONE
+const NUMBER:usize = 3;
-
-const NUMBER = 3;
 fn main() {
     println!("Number {}", NUMBER);
 }