Module 25: Json

Practice Tasks

Complete these tasks to reinforce what you learned in this module.

Task 1: Deserialize JSON string

Define a struct Person with name: String and age: u32. Deserialize the string r#"{"name": "Alice", "age": 30}"# with serde_json::from_str and print both fields.

Expected Output:

Program prints `name = Alice, age = 30` (or equivalent).

Hint: Define a struct with fields matching the JSON keys and derive Deserialize. Use serde_json::from_str on the JSON string; handle the Result.

Starter Code:

task.rs

// Task 1: Deserialize JSON. See tasks/TASKS.md.

fn main() {
    todo!("Deserialize Person from JSON string, print");
}

Task 2: Serialize to JSON

Define a struct Product with id: i32 and name: String. Create an instance, serialize it with serde_json::to_string, and print the JSON string.

Expected Output:

Output is valid JSON, e.g. `{"id":1,"name":"Widget"}`.

Hint: Derive Serialize on the struct. Use the serde_json function that turns a value into a JSON string; handle the Result.

Starter Code:

task.rs

// Task 2: Serialize to JSON. See tasks/TASKS.md.

fn main() {
    todo!("Serialize Product to JSON string, print");
}