update 6

Author: Velnam

exercises/quiz1.rs

@@ -16,14 +16,11 @@
 
 // Put your function here!
 fn calculate_price_of_apples(number: i32) -> i32 {
-
-    if number > 40 {
-        number
-    } else {
-        number * 2
-    }
+    let price_per_apple = if number > 40 { 1 } else { 2 };
+    number * price_per_apple
 }
 
+
 // Don't modify this function!
 #[test]
 fn verify_test() {

exercises/quiz2.rs

@@ -20,8 +20,6 @@
 //
 // No hints this time!
 
-// I AM NOT DONE
-
 pub enum Command {
     Uppercase,
     Trim,
@@ -32,11 +30,23 @@ mod my_module {
     use super::Command;
 
     // TODO: Complete the function signature!
-    pub fn transformer(input: ???) -> ??? {
+    pub fn transformer(input: Vec<(String, Command)>) -> Vec<String> {
         // TODO: Complete the output declaration!
-        let mut output: ??? = vec![];
+        let mut output: Vec<String> = vec![];
+
         for (string, command) in input.iter() {
-            // TODO: Complete the function body. You can do it!
+            let transformed = match command {
+                Command::Uppercase => string.to_uppercase(),
+                Command::Trim => string.trim().to_string(),
+                Command::Append(times) => {
+                    let mut s = string.clone();
+                    for _ in 0..*times {
+                        s.push_str("bar");
+                    }
+                    s
+                }
+            };
+            output.push(transformed);
         }
         output
     }
@@ -45,7 +55,7 @@ mod my_module {
 #[cfg(test)]
 mod tests {
     // TODO: What do we need to import to have `transformer` in scope?
-    use ???;
+    use super::my_module::transformer;
     use super::Command;
 
     #[test]

exercises/quiz3.rs

@@ -16,18 +16,20 @@
 //
 // Execute `rustlings hint quiz3` or use the `hint` watch subcommand for a hint.
 
-// I AM NOT DONE
+use std::fmt::Display;
 
-pub struct ReportCard {
-    pub grade: f32,
+pub struct ReportCard<T: Display> {
+    pub grade: T,
     pub student_name: String,
     pub student_age: u8,
 }
 
-impl ReportCard {
+impl<T: Display> ReportCard<T> {
     pub fn print(&self) -> String {
-        format!("{} ({}) - achieved a grade of {}",
-            &self.student_name, &self.student_age, &self.grade)
+        format!(
+            "{} ({}) - achieved a grade of {}",
+            &self.student_name, &self.student_age, &self.grade
+        )
     }
 }
 
@@ -50,9 +52,8 @@ mod tests {
 
     #[test]
     fn generate_alphabetic_report_card() {
-        // TODO: Make sure to change the grade here after you finish the exercise.
         let report_card = ReportCard {
-            grade: 2.1,
+            grade: "A+",
             student_name: "Gary Plotter".to_string(),
             student_age: 11,
         };

exercises/variables/variables1.rs

@@ -10,3 +10,4 @@ fn main() {
     let x = 5;
     println!("x has the value {}", x);
 }
+