control flow, primitive types and vectors

exercises/06_move_semantics/move_semantics1.rs

@@ -1,6 +1,6 @@
 // TODO: Fix the compiler error in this function.
 fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
-    let vec = vec;
+    let mut vec = vec;
 
     vec.push(88);
 

exercises/06_move_semantics/move_semantics2.rs

@@ -20,7 +20,7 @@ mod tests {
     fn move_semantics2() {
         let vec0 = vec![22, 44, 66];
 
-        let vec1 = fill_vec(vec0);
+        let vec1 = fill_vec(vec0.clone());
 
         assert_eq!(vec0, [22, 44, 66]);
         assert_eq!(vec1, [22, 44, 66, 88]);

exercises/06_move_semantics/move_semantics3.rs

@@ -1,5 +1,5 @@
 // TODO: Fix the compiler error in the function without adding any new line.
-fn fill_vec(vec: Vec<i32>) -> Vec<i32> {
+fn fill_vec(mut vec: Vec<i32>) -> Vec<i32> {
     vec.push(88);
 
     vec

exercises/06_move_semantics/move_semantics4.rs

@@ -10,8 +10,8 @@ mod tests {
     fn move_semantics4() {
         let mut x = Vec::new();
         let y = &mut x;
-        let z = &mut x;
         y.push(42);
+        let z = &mut x;
         z.push(13);
         assert_eq!(x, [42, 13]);
     }

exercises/06_move_semantics/move_semantics5.rs

@@ -4,12 +4,12 @@
 // removing references (the character `&`).
 
 // Shouldn't take ownership
-fn get_char(data: String) -> char {
+fn get_char(data: &String) -> char {
     data.chars().last().unwrap()
 }
 
 // Should take ownership
-fn string_uppercase(mut data: &String) {
+fn string_uppercase(mut data: String) {
     data = data.to_uppercase();
 
     println!("{data}");
@@ -18,7 +18,7 @@ fn string_uppercase(mut data: &String) {
 fn main() {
     let data = "Rust is great!".to_string();
 
-    get_char(data);
+    get_char(&data);
 
-    string_uppercase(&data);
+    string_uppercase(data);
 }