ReactNative json字段key的修改

需求：需要将字段"cars"，改为"data"
Car.json

 [
    {
      "cars": [
        {
          "icon": "m_9_100.png",
          "name": "奥迪"
        },
        {
          "icon": "m_97_100.png",
          "name": "阿斯顿·马丁"
        }
      ],
      "title": "A"
    },
    {
      "cars": [
        {
          "icon": "m_21_100.png",
          "name": "长城"
        },
        {
          "icon": "m_203_100.png",
          "name": "之诺"
        }
      ],
      "title": "Z"
    }
  ]

方法一：使用正则

const data = require('./Car.json').data;

let json = changeData(data, 'data', 'cars');

//属性 "g"、"i" 和 "m"，分别用于指定全局匹配、区分大小写的匹配和多行匹配
function changeData(data, newKey, oldKey) {
   let str = JSON.stringify(data);
   let reg = new RegExp(oldKey, 'a');
   let newStr = str.replace(reg, newKey);
   return JSON.parse(newStr);
 }

方法二：使用递归

const data = require('./Car.json').data;

changeData2(data, 'data', 'cars');
// console.info(data)

function changeData2(date, newKey, oldKey) {
    date.forEach(item => {
      if (item[newKey] && item[newKey].length > 0)
        changeData2(item[newKey], newKey, oldKey);
      else if (item[oldKey]) {
        item[newKey] = item[oldKey];
        delete item[oldKey];
        if (item[newKey].length) changeData2(item[newKey], newKey, oldKey);
      }
    });
  }