feat: updated generics1

exercises/generics/generics1.rs

@@ -1,11 +1,19 @@
-// This shopping list program isn't compiling!
-// Use your knowledge of generics to fix it.
+// generics1.rs
+// Use your knowledge of generics to fix the function signature.
 
 // Execute `rustlings hint generics1` or use the `hint` watch subcommand for a hint.
 
 // I AM NOT DONE
 
+fn last_on_list(list: &[&str]) -> &str {
+    list.last().unwrap()
+}
+
+// Do not change the main method
 fn main() {
-    let mut shopping_list: Vec<?> = Vec::new();
-    shopping_list.push("milk");
+    let names_list = vec!["maria", "jacob", "kacper"];
+    println!("last name on the list is: {}", last_on_list(&names_list));
+
+    let numbers_list = vec![1, 2, 3];
+    println!("last number on the list is: {}", last_on_list(&numbers_list));
 }

info.toml

@@ -667,8 +667,11 @@ name = "generics1"
 path = "exercises/generics/generics1.rs"
 mode = "compile"
 hint = """
-Vectors in Rust make use of generics to create dynamically sized arrays of any type.
-You need to tell the compiler what type we are pushing onto this vector."""
+Vectors in Rust use generics to create dynamically-sized arrays of any type.
+The last_on_list function takes a vector as an argument, but only accepts vectors that store the &str type.
+To allow the function to accept vectors that store any type, you can leverage your knowledge about generics.
+If you're unsure how to proceed, please refer to the Rust Book at:
+https://doc.rust-lang.org/book/ch10-01-syntax.html#in-function-definitions."""
 
 [[exercises]]
 name = "generics2"