rustHow to iterate throught JSON in Rust

Iterating through JSON in Rust can be done using the serde_json crate. This crate provides a Value type which can be used to represent any valid JSON value. To iterate through a JSON object, you can use the for loop and the as_object method to access the underlying HashMap of the JSON object.

Example code

use serde_json::Value;

let json_str = r#"
    {
        "name": "John Doe",
        "age": 43,
        "phones": [
            "+44 1234567",
            "+44 2345678"
        ]
    }
"#;

let json_value: Value = serde_json::from_str(json_str).unwrap();

for (key, value) in json_value.as_object().unwrap() {
    println!("key: {} value: {}", key, value);
}

Output example

key: name value: "John Doe"
key: age value: 43
key: phones value: [
    "+44 1234567",
    "+44 2345678"
]

Code explanation

• serde_json crate: provides a Value type which can be used to represent any valid JSON value
• for loop: used to iterate through the JSON object
• as_object method: used to access the underlying HashMap of the JSON object
• unwrap method: used to convert the Value type to a HashMap

Helpful links

• serde_json crate
• JSON and Serde in Rust

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