javascript数据转换

Question

如何把c数组形式的数据转换为a形式的数据？

    let b = [{
    createdAt: '2014-12-21 23:12:00',
    date: '2014-12-24 23:12:00',
    name: `This is production name 1`,
    upgradeNum: 'Upgraded: 56',
    data: {
      name: 'aa',
      platform: 'iOS1',
      version: '10.3.4.5654',
      upgradeNum: 500,
      creator: 'Jack',
    }
  }, {
    createdAt: '2014-12-22 23:12:00',
    date: '2014-12-24 23:12:00',
    name: `This is production name 2`,
    upgradeNum: 'Upgraded: 57',
    data: {
      name: 'aa',
      platform: 'iOS1',
      version: '10.3.4.5654',
      upgradeNum: 500,
      creator: 'Jack',
    }
  }, {
    createdAt: '2014-12-23 23:12:00',
    date: '2014-12-24 23:12:00',
    name: `This is production name 3`,
    upgradeNum: 'Upgraded: 58',
    data: {
      name: 'aa',
      platform: 'iOS1',
      version: '10.3.4.5654',
      upgradeNum: 500,
      creator: 'Jack',
    }
  }, {
    createdAt: '2014-12-11 23:12:00',
    date: '2014-12-24 23:12:00',
    name: `This is production name 1`,
    upgradeNum: 'Upgraded: 1',
    data: {
      name: 'bb',
      platform: 'iOS2',
      version: '10.3.4.5654',
      upgradeNum: 600,
      creator: 'Tom',
    }
  }, {
    createdAt: '2014-12-22 23:12:00',
    date: '2014-12-24 23:12:00',
    name: `This is production name 2`,
    upgradeNum: 'Upgraded: 2',
    data: {
      name: 'bb',
      platform: 'iOS2',
      version: '10.3.4.5654',
      upgradeNum: 600,
      creator: 'Tom',
    }
  }]
  let c = [{
    key:1,
    name: 'aa',
    platform: 'iOS1',
    version: '10.3.4.5654',
    upgradeNum: 500,
    creator: 'Jack',
    children: [{
      key:3,
      createdAt: '2014-12-21 23:12:00',
      date: '2014-12-24 23:12:00',
      name: `This is production name 1`,
      upgradeNum: 'Upgraded: 56',
    }, {
      key:4,
      createdAt: '2014-12-22 23:12:00',
      date: '2014-12-24 23:12:00',
      name: `This is production name 2`,
      upgradeNum: 'Upgraded: 57',
    }, {
      key:5,
      createdAt: '2014-12-23 23:12:00',
      date: '2014-12-24 23:12:00',
      name: `This is production name 3`,
      upgradeNum: 'Upgraded: 58',
    }]
  }, {
    key:2,
    name: 'bb',
    platform: 'iOS2',
    version: '10.3.4.5654',
    upgradeNum: 600,
    creator: 'Tom',
    children: [{
      key:6,
      createdAt: '2014-12-11 23:12:00',
      date: '2014-12-24 23:12:00',
      name: `This is production name 1`,
      upgradeNum: 'Upgraded: 1',
    }, {
      key:7,
      createdAt: '2014-12-22 23:12:00',
      date: '2014-12-24 23:12:00',
      name: `This is production name 2`,
      upgradeNum: 'Upgraded: 2',
    }]
  }]
 

Answer 1

上个回复的代码不行吗？json对象中同一个节点中不能出现2个一样的键名称，要不前面的值会被后面的覆盖。
name: This is production name 1,这个最好换个键名称，比如proName

    let b = [{
        createdAt: '2014-12-21 23:12:00',
        date: '2014-12-24 23:12:00',
        name: `This is production name 1`,
        upgradeNum: 'Upgraded: 56',
        data: {
            name: 'aa',
            platform: 'iOS1',
            version: '10.3.4.5654',
            upgradeNum: 500,
            creator: 'Jack',
        }
    }, {
        createdAt: '2014-12-22 23:12:00',
        date: '2014-12-24 23:12:00',
        name: `This is production name 2`,
        upgradeNum: 'Upgraded: 57',
        data: {
            name: 'aa',
            platform: 'iOS1',
            version: '10.3.4.5654',
            upgradeNum: 500,
            creator: 'Jack',
        }
    }, {
        createdAt: '2014-12-23 23:12:00',
        date: '2014-12-24 23:12:00',
        name: `This is production name 3`,
        upgradeNum: 'Upgraded: 58',
        data: {
            name: 'aa',
            platform: 'iOS1',
            version: '10.3.4.5654',
            upgradeNum: 500,
            creator: 'Jack',
        }
    }, {
        createdAt: '2014-12-11 23:12:00',
        date: '2014-12-24 23:12:00',
        name: `This is production name 1`,
        upgradeNum: 'Upgraded: 1',
        data: {
            name: 'bb',
            platform: 'iOS2',
            version: '10.3.4.5654',
            upgradeNum: 600,
            creator: 'Tom',
        }
    }, {
        createdAt: '2014-12-22 23:12:00',
        date: '2014-12-24 23:12:00',
        name: `This is production name 2`,
        upgradeNum: 'Upgraded: 2',
        data: {
            name: 'bb',
            platform: 'iOS2',
            version: '10.3.4.5654',
            upgradeNum: 600,
            creator: 'Tom',
        }
    }]
    //==========下面为主要代码
    let c = [];
    let keys = Array.from(new Set(b.map(i => i.data.name)));
    let subKeyStart = keys.length + 1;
    keys.forEach((key,index) => {
        let children = b.filter(i => i.data.name == key);
        let cItem = { key: index + 1, ...children[0].data };
        cItem.children = children.map(i => {
            var item = { ...i, key: subKeyStart++ };
            delete item.data;
            return item;
        })
        c.push(cItem);
    });

    console.log(c);