How can I deserialize JSON with a top-level array using Serde?

Question

I have a some JSON data that is returned from a web service. The JSON is a top-level array:

[
    {
        \"data\": \"value1\"
    },
    {
        \"data\         


        

Answer 1

You can use a Vec:

extern crate serde;
extern crate serde_json;

#[macro_use]
extern crate serde_derive;

use serde_json::Error;

#[derive(Serialize, Deserialize, Debug)]
struct Foo {
    data: String,
}

fn typed_example() -> Result<(), Error> {
    let data = r#"[
        {
            "data": "value1"
        },
        {
            "data": "value2"
        },
        {
            "data": "value3"
        }
    ]"#;

    let array: Vec<Foo> = serde_json::from_str(data)?;

    for elem in array.iter() {
        println!("{:?}", elem);
    }
    Ok(())
}

fn main() {
    typed_example().unwrap();
}