Rust

Understanding JSON Array vs JSON Object

See more JSON Examples

This example explains the difference between a JSON Array and a JSON Object. A JSON Array begins with "[" and ends with "]", whereas a JSON Object begins with "{" and ends with "}".

Elements contained in a JSON array are accessed by index, whereas elements in a JSON object are typically accessed by name (but can also be accessed by index).

Rust

// A JSON array should be loaded into a Chilkat JSON array,
// whereas a JSON object should be loaded into a Chilkat JSON object.

// A JSON array may contain objects, and a JSON object may contains arrays, but
// it is the top-level (outermost) element that defines whether the JSON
// document is an array or an object.
// An array begins and ends with "[" ... "]"
// An object begins and ends with "{" ... "}"

// For example, an array containing 2 objects:
let str_json_array = "[ { \"name\": \"Bill\" }, { \"name\": \"Ted\" } ]".to_string();

// Load it into a JSON array.
let json_a = chilkat::JsonArray::new();
let _ = json_a.load(&str_json_array).is_ok();
println!("number of array elements: {}", json_a.size());

// This is an object containing an array:
let str_json_obj = "{ \"characters\": [ \"Bill\", \"Ted\" ] }".to_string();

// Load it into a JSON object.
let json_o = chilkat::JsonObject::new();
let _ = json_o.load(&str_json_obj).is_ok();
println!("number of object members: {}", json_o.size());