vue将二维数组对象转为一维数组对象

      title: [
        {
          id: 1, 
          name: '财会经济',
          children: [
            {id: 11, name: '初级会计'},
            {id: 12, name: '初级会计'}
          ]
        },
        {
          id: 2, 
          name: '建筑工程',
          children: [
            {id: 21, name: '一级建造师'},
            {id: 22, name: '二级建造师'}
          ]
        },
        {
          id: 3, 
          name: '卫生资格',
          children: [
            {id: 23, name: '内科'},
            {id: 24, name: '五官科'}
          ]
        },
      ]

    demo() {
      this.title = this.getFlatArr(this.title)
      console.log(this.title);
    },

    // 处理数据 将二维数组对象转为一维数组对象
    getFlatArr(major, i) {
      return major.reduce((array, item) => {
        if (i == 2) {
          item.name = '一 ' + item.name;
        }
        let flatArr = [...array, item];

        if (item.children) {
          flatArr = [...flatArr, ...this.getFlatArr(item.children, 2)];
        }
        return flatArr;
      }, []);
    },