From 46121b71cf2f4da296e80fad025eaee03c67dcd5 Mon Sep 17 00:00:00 2001 From: mo8it Date: Thu, 27 Jun 2024 02:00:08 +0200 Subject: generics1 rewrite and solution --- exercises/14_generics/generics1.rs | 19 +++++++++++++++---- 1 file changed, 15 insertions(+), 4 deletions(-) (limited to 'exercises/14_generics') diff --git a/exercises/14_generics/generics1.rs b/exercises/14_generics/generics1.rs index c023e64..87ed990 100644 --- a/exercises/14_generics/generics1.rs +++ b/exercises/14_generics/generics1.rs @@ -1,7 +1,18 @@ -// This shopping list program isn't compiling! Use your knowledge of generics to -// fix it. +// `Vec` is generic over the type `T`. In most cases, the compiler is able to +// infer `T`, for example after pushing a value with a concrete type to the vector. +// But in this exercise, the compiler needs some help through a type annotation. fn main() { - let mut shopping_list: Vec = Vec::new(); - shopping_list.push("milk"); + // TODO: Fix the compiler error by annotating the type of the vector + // `Vec`. Choose `T` as some integer type that can be created from + // `u8` and `i8`. + let mut numbers = Vec::new(); + + // Don't change the lines below. + let n1: u8 = 42; + numbers.push(n1.into()); + let n2: i8 = -1; + numbers.push(n2.into()); + + println!("{numbers:?}"); } -- cgit v1.2.3