finish quiz2

exercises/quiz2.rs

@@ -32,11 +32,24 @@ 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 processed_string = match command {
+                Command::Uppercase => string.to_uppercase(),
+                Command::Trim => string.trim().to_string(),
+                Command::Append(n) => {
+                    let mut s = string.clone();
+                    for _ in 0..*n {
+                        s.push_str("bar");
+                    }
+                    s
+                }
+            };
+            output.push(processed_string);
+
         }
         output
     }
@@ -45,7 +58,7 @@ 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]