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Serde JSON

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Reference:docs.rs

Untyped JSON ​

shell
cargo add serde_json

Instantiate a JSON:

rust
let data = serde_json::json!({
    "name": "John Doe",
    "age": 43,
});

Parse ​

Operating on untyped JSON values:

rust
use serde_json::Value;

fn main() {
    let raw_json = r#"
        {
            "name": "John Doe",
            "age": 43
        }"#;
    let data: Value = match serde_json::from_str(&raw_json) {
        Ok(result) => result,
        Err(_) => panic!("Could not parse JSON"),
    };
    println!("Name is {}, age is {}.", data["name"], data["age"])
}

Convert values into primitives:

rust
let name = data["name"].as_str().unwrap();
let number = data["age"].as_i64().unwrap();  // Integer
let number = data["age"].as_f64().unwrap();  // Float

Stringify ​

Convert a JSON type into a string.

rust
let raw_json = serde_json::to_string(&data).unwrap();