Json對象點路徑轉換成全路徑

/**
 * Json對象點路徑轉換成全路徑
 * @param {Object} obj 
 */
formatJson(obj) {
  Object.keys(obj).forEach(k => {
    if (k.includes('.')) {
      let arr = k.split('.');
      if (arr.length > 1) {
        obj[arr[0]] = {};
        obj[arr[0]][arr.splice(1).join('.')] = obj[k];
        this.formatJson(obj[arr[0]]);
        delete obj[k];
      }
    }
  })
}