Function permissive_json_pointer::map_leaf_values

pub fn map_leaf_values<'a>(
    value: &mut Map<String, Value>, 
    selectors: impl IntoIterator<Item = &'a str>, 
    mapper: impl FnMut(&str, &mut Value)
)

Map the selected leaf values of a json allowing you to update only the fields that were selected.

use serde_json::{Value, json};
use permissive_json_pointer::map_leaf_values;

let mut value: Value = json!({
    "jean": {
        "age": 8,
        "race": {
            "name": "bernese mountain",
            "size": "80cm",
        }
    }
});
map_leaf_values(
    value.as_object_mut().unwrap(),
    ["jean.race.name"],
    |key, value| match (value, dbg!(key)) {
        (Value::String(name), "jean.race.name") => *name = "patou".to_string(),
        _ => unreachable!(),
    },
);
assert_eq!(
    value,
    json!({
        "jean": {
            "age": 8,
            "race": {
                "name": "patou",
                "size": "80cm",
            }
        }
    })
);