Function jsonpath_lib::select

pub fn select(json: &Value, path: &str) -> Result<Value, String>

This function compile a jsonpath everytime and it convert serde_json's Value to jsonpath's RefValue everytime and then it return a serde_json::value::Value.

extern crate jsonpath_lib as jsonpath;
#[macro_use] extern crate serde_json;

let json_obj = json!({
"school": {
   "friends": [
        {"name": "친구1", "age": 20},
        {"name": "친구2", "age": 20}
    ]
},
"friends": [
    {"name": "친구3", "age": 30},
    {"name": "친구4"}
]});

let json = jsonpath::select(&json_obj, "$..friends[0]").unwrap();

let ret = json!([
    {"name": "친구3", "age": 30},
    {"name": "친구1", "age": 20}
]);
assert_eq!(json, ret);