rust in json
fn main(){
let mut a = json! {
"a": 1,
"b": true,
"f": 1.,
"c": {
"d": 1,
"f": 2
},
"arr": [1, "aa"],
"null": null
};
a["a"] += 2.to_json_type();
println!("{a:#?}");
println!("a: {:?}", a["a"]);
}