import * as jsonpath from "jsonpath-wasm";

let jsonObj = {
    "school": {
        "friends": [
            {"name": "친구1", "age": 20},
            {"name": "친구2", "age": 20}
        ]
    },
    "friends": [
        {"name": "친구3", "age": 30},
        {"name": "친구4"}
    ]
};

let ret = [
    {"name": "친구3", "age": 30},
    {"name": "친구1", "age": 20}
];

const path = '$..friends[0]';

let ret1 = jsonpath.select(jsonObj, path);
let ret2 = jsonpath.compile(path)(jsonObj);
let ret3 = jsonpath.selector(jsonObj)(path);

let selector = new jsonpath.Selector();
selector.path(path);
selector.value(jsonObj);
let ret4 = selector.select();

console.log(
    JSON.stringify(ret) == JSON.stringify(ret1),
    JSON.stringify(ret) == JSON.stringify(ret2),
    JSON.stringify(ret) == JSON.stringify(ret3),
    JSON.stringify(ret) == JSON.stringify(ret4)
);