Rust serde_json ,jsonから、　配列変換(array * object)で、繰り返し処理の例

main-pub.rs

//
//  Rust serde_json ,jsonから、　配列変換(array * object)で、繰り返し処理の例
//
// [dependencies]
// serde = { version = "1.0", features = ["derive"] }
// serde_json = "1.0"
//
use serde::{Deserialize, Serialize};
use serde_json::{Result, Value};


fn type_of<T>(_: T) -> &'static str {
    std::any::type_name::<T>()
}

//
pub fn test4() -> Result<()>{
    let data = r#"
    [
        {
            "name": "John Doe",
            "age": 43
        },
        {
            "name": "Joh-2",
            "age": 23
        },
        {
            "name": "Joh-3",
            "age": 28
        }
    ]
    "#; 
//    let deserialized: Value = serde_json::from_str(data)?;
    let deserialized: Value = serde_json::from_str(data).unwrap();
//    println!( "{:?}"  , deserialized );
    let max= 3;
    for i  in 0..max {
        println!( "{}, a={}"  , deserialized[i]["name"], deserialized[i]["age"] );
    }

    Ok(())
}

//
fn main() {
    //println!("Hello, world!");
    test4();
}