Complete generics exercises

exercises/14_generics/generics1.rs

@@ -6,9 +6,19 @@
 // Execute `rustlings hint generics1` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
 
 fn main() {
-    let mut shopping_list: Vec<?> = Vec::new();
+    let mut shopping_list: Vec<&str> = Vec::new();
     shopping_list.push("milk");
 }
+
+
+// fn main() {
+//     let mut shopping_list: Vec<&str> = Vec::new();
+//     // shopping_list.push("milk");
+//     add_to_shopping_list(shopping_list, "milk")
+// }
+
+// fn add_to_shopping_list<T>(mut list: Vec<T>, grocery: T) {
+//     list.push(grocery);
+// }

exercises/14_generics/generics2.rs

@@ -6,14 +6,12 @@
 // Execute `rustlings hint generics2` or use the `hint` watch subcommand for a
 // hint.
 
-// I AM NOT DONE
+struct Wrapper<T> {
-
+    value: T,
-struct Wrapper {
-    value: u32,
 }
 
-impl Wrapper {
+impl<T> Wrapper<T> {
-    pub fn new(value: u32) -> Self {
+    pub fn new(value: T) -> Self {
         Wrapper { value }
     }
 }