feat: update module2 challenge

Author: jeastham1993

.github/workflows/rust.yml

@@ -17,8 +17,8 @@ jobs:
       matrix:
         project:
           - "src/examples/module1/rust_app"
-          - "src/examples/module2/1-memory-safety/rust_app_memory_demo"
-          - "src/examples/module2/2-sustainability/rust_app"
+          - "src/demos/1-memory-safety/rust_app_memory_demo"
+          - "src/demos/2-sustainability/rust_app"
           - "src/examples/module4/rust_app"
           - "src/examples/module5/rust_app"
           - "src/examples/module6/rust_app"
@@ -27,8 +27,9 @@ jobs:
           - "src/examples/module9/rust_app"
           - "src/examples/module10/rust_app"
           - "src/solutions/module1/rust_app"
-          - "src/solutions/module2/1-memory-safety/rust_app_memory_demo"
-          - "src/solutions/module2/2-sustainability/rust_app"
+          - "src/demos/1-memory-safety/rust_app_memory_demo"
+          - "src/demos/2-sustainability/rust_app"
+          - "src/solutions/module2/rust_app"
           - "src/solutions/module3/rust_app"
           - "src/solutions/module4/rust_app"
           - "src/solutions/module5/rust_app"

docs/docs/module2/6_memory-safety.md

@@ -40,11 +40,11 @@ This approach provides:
 
 ## Analyzing the Memory Safety Examples
 
-You'll first look at specific examples from the codebase that demonstrate these differences. You can find them in [GitHub](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/tree/main/src/solutions/module2/1-memory-safety).
+You'll first look at specific examples from the codebase that demonstrate these differences. You can find them in [GitHub](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/tree/main/src/demos/1--memory-safety).
 
 ### .NET Example
 
-[.NET Sample Link](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/blob/main/src/solutions/module2/1-memory-safety/DotnetMemorySafety/Program.cs)
+[.NET Sample Link](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/blob/main/src/demos/1--memory-safety/DotnetMemorySafety/Program.cs)
 
 ```csharp showLineNumbers
 var user = new User(){
@@ -80,7 +80,7 @@ This C# code creates a `User` object and then attempts to update its name from t
 
 ### Rust Example
 
-[Rust Link](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/blob/main/src/solutions/module2/1-memory-safety/rust_app/src/main.rs)
+[Rust Link](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/blob/main/src/demos/1--memory-safety/rust_app/src/main.rs)
 
 ```rust showLineNumbers
 #[tokio::main]
@@ -111,7 +111,7 @@ async fn main() {
 The Rust example attempts something similar but with a crucial difference: it **will not compile**. You can try if you want:
 
 ```sh
-cd src/examples/module2/1-memory-safety/rust_app
+cd src/demos/1-memory-safety/rust_app
 cargo run
 ```
 

docs/docs/module2/8_challenge.md

@@ -4,6 +4,17 @@ sidebar_position: 8
 
 # Challenge
 
-There is no explicit coding challenge in this example, however, I would recommend exploring the [memory demo](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/tree/main/src/solutions/module2/1-memory-safety) and [memory efficiency](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/tree/main/src/solutions/module2/2-sustainability) demos alongside their .NET counterparts.
+## Demos
+
+There are a couple of demos as part of this module, however, I would recommend exploring the [memory demo](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/tree/main/src/demos/1--memory-safety) and [memory efficiency](https://github.com/jeastham1993/rust-for-dotnet-devs-workshop/tree/main/src/solutions/module2/2-sustainability) demos alongside their .NET counterparts.
+
+Open up Activity Monitor on Mac, or Task Manager on Windows, and then run both the .NET and Rust examples and see how it affects your local resource consumption.
+
+## Challenge
+
+The code in [src/examples/module2/rust_app](/src/examples/module2/rust_app/) contains the beginnings of a user management application. But it **doesn't compile** 🥺, your challenge is to get this small code snippet working. There are issues with borrowing, ownership and mutability.
+
+If you get past that, you can also try to better handle errors in the `update_name` function. Instead of always updating the name, let's return an error if the length of the new name is less than or equal to zero.
+
+
 
-Open up Activity Monitor on Mac, or Task Manager on Windows, and then run both the .NET and Rust examples and see how it affects your local resource consumption.