javascript - ES6 为多个数组运行不同的函数

Question

我有一个 sendEmail 函数，它需要根据用户在数组中的位置发送不同的电子邮件。例如，我有以下数据:

[ 
  { download: 'Release sale. 50% off!',
    user: 'test1@gmail.com' },
  { download: 'Release sale. 50% off!',
    user: 'test2@gmail.com' },
  { download: 'Release sale. 50% off!',
    user: 'test3@gmail.com' },
  { download: 'Release sale. 50% off!',
    user: 'test4@gmail.com' } 
]
[ 
  { download: 'Test',
    user: 'test5@gmail.com' 
  } 
]

对于每个数组，我需要累积所有 user 电子邮件和 download 字符串并运行以下函数:

await transporter.sendMail({
    from: '"Test" <noreply@test.com>',
    to: [email array here],
    subject: "Here is your file",
    text: `Here is your download: ${download}`
  })

Answer 1

这可以简单地通过减少来实现

const emailReduced = [ 
  { download: 'Release sale. 50% off!',
    user: 'test1@gmail.com' },
  { download: 'Release sale. 50% off!',
    user: 'test2@gmail.com' },
  { download: 'Release sale. 50% off!',
    user: 'test3@gmail.com' },
  { download: 'Release sale. 50% off!',
    user: 'test4@gmail.com' } 
].reduce((acc,{download, user}) => {
  return {
    ...acc,
    to: [...acc.to, user],
    text: `Here is your download: ${download}`
  }
}, {from: 'test <test@noreply.com>', subject: 'here is your file', to:[]})

await transporter.sendMail(emailReduced)