Implement lodash get

function _get(obj, path, _default) {
    if (typeof obj !== "object") {
        throw new Error("param 1 must be an object")
    }

    if (typeof path !== "string" && !Array.isArray(path)) {
        throw new Error("param 2 must be an object or a string")
    }

    let _path = path

    if (typeof _path === "string") {
        const pathArr = _path.split(".").map(str => {
            return str.split(/([a-zA-Z]*)\[(\d+)\]/g).filter(e => e)
        }).flat();
    }

    try {
        let tmp = obj;
        for (let i = 0; i < _path.length; i += 1) {
            tmp = tmp[_path[i]]

            if (!tmp) {
                return _default
            }
        }

        return tmp;
    } catch (error) {
        return _default;
    }
}