Question

我正在尝试转换给定的数组

[ { slug: 'invoice',
    display: 'Invoice',
    channels: { sms: true, email: false } },
  { slug: 'payment',
    display: 'Payment',
    channels: { sms: true, email: true } },
  { slug: 'manual_reminder',
    display: 'Manual Reminder',
    channels: { sms: true, email: false } },
  { slug: 'automatic_reminder',
    display: 'Automatic Reminder',
    channels: { sms: true, email: false } } ]

进入这个数组

{"10": 1, "20": 3, "30": 1, "31": 1}

我编写了将上面的数组转换为此数组的代码但我仍然没有得到正确的输出

const NotificationChannels = {
  SMS: 1, // 01
  EMAIL: 2 // 10
  // BOTH: 3
};

const NotificationItems = {
  INVOICE: 10,
  PAYMENT: 20,
  MANUAL_REMINDER: 30,
  AUTOMATIC_REMINDER: 31
};

const getVal = channels => {
  if (channels.sms === true && channels.email === false)
    return NotificationChannels.SMS;

  if (channels.sms === false && channels.email === true)
    return NotificationChannels.EMAIL;

  if (channels.sms === true && channels.email === true)
    return NotificationChannels.EMAIL | NotificationChannels.SMS;
};

let arr = req.body.notification_settings;
console.log(arr);
for (let i = 0; i < arr.length; i++) {
  console.log(arr[i].channels);

  console.log(getVal(arr[i].channels));

  var x = NotificationItems[arr[i].slug.toString().toUpperCase()];
  console.log(x);

  // databaseObject.x = getVal(arr[i].channels);

  // console.log(arr[i].slug.toString().toUpperCase());
  // console.log(arr[i].channels);
}

＆＃13;

const req = {
	body: {
  	notification_settings: [
    	{ slug: 'invoice', display: 'Invoice', channels: { sms: true, email: false } },
    	{ slug: 'payment', display: 'Payment', channels: { sms: true, email: true } },
    	{ slug: 'manual_reminder', display: 'Manual Reminder', channels: { sms: true, email: false } },
    	{ slug: 'automatic_reminder', display: 'Automatic Reminder', channels: { sms: true, email: false } }
  	]
  }
};

const NotificationChannels = {
  SMS: 1, // 01
  EMAIL: 2 // 10
  // BOTH: 3
};

const NotificationItems = {
  INVOICE: 10,
  PAYMENT: 20,
  MANUAL_REMINDER: 30,
  AUTOMATIC_REMINDER: 31
};

const getVal = channels => {
  if (channels.sms === true && channels.email === false)
    return NotificationChannels.SMS;

  if (channels.sms === false && channels.email === true)
    return NotificationChannels.EMAIL;

  if (channels.sms === true && channels.email === true)
    return NotificationChannels.EMAIL | NotificationChannels.SMS;
};


let arr = req.body.notification_settings;
for (let i = 0; i < arr.length; i++) {
  console.log(arr[i].channels);

  console.log(getVal(arr[i].channels));

  var x = NotificationItems[arr[i].slug.toString().toUpperCase()];
  console.log(x);
}

＆＃13;

我是JavaScript的新手，我成功获取了我必须转换为JavaScript对象的值，但我得到了正确的输出。我评论的那些行没有给我正确的结果。请给出一些提示。在此先感谢!!

Answer 1

这应该使用Array.prototype.reduce()：

const result = data.reduce((a, v) => {
  a[NotificationItems[v.slug.toUpperCase()]] = (v.channels.sms ? 1 : 0) +
                                               (v.channels.email ? 2 : 0);
  return a;
}, {});

或者让它完全动态：

const result = data.reduce((a, v) => {
  a[NotificationItems[v.slug.toUpperCase()]] = Object.keys(v.channels).reduce((b, w) => b + (v.channels[w] ? NotificationChannels[w.toUpperCase()] : 0), 0)
  return a;
}, {});

完整代码段

const NotificationChannels = {
  SMS: 1, // 01
  EMAIL: 2 // 10
  // BOTH: 3
};

const NotificationItems = {
  INVOICE: 10,
  PAYMENT: 20,
  MANUAL_REMINDER: 30,
  AUTOMATIC_REMINDER: 31
};

const data = [{
    slug: 'invoice',
    display: 'Invoice',
    channels: {
      sms: true,
      email: false
    }
  },
  {
    slug: 'payment',
    display: 'Payment',
    channels: {
      sms: true,
      email: true
    }
  },
  {
    slug: 'manual_reminder',
    display: 'Manual Reminder',
    channels: {
      sms: true,
      email: false
    }
  },
  {
    slug: 'automatic_reminder',
    display: 'Automatic Reminder',
    channels: {
      sms: true,
      email: false
    }
  }
];

const result = data.reduce((a, v) => {
  a[NotificationItems[v.slug.toUpperCase()]] = Object.keys(v.channels).reduce((b, w) => b + (v.channels[w] ? NotificationChannels[w.toUpperCase()] : 0), 0)
  return a;
}, {});

console.log(result);

尝试将对象数组转换为JavaScript对象

1 个答案: