javascript - 如何更新数组输出

Question

输入是一个简单的对象数组(联系人)

输入:

[
  { name: "Mohan", phone: xxxxxx },
  { name: "Ramanujan", phone: xxxxxx },
  { name: "Rabindranath", phone: xxxxxx },
  { name: "Satyajit", phone: xxxxxx },
  { name: "Subhash", phone: xxxxxx },
  { name: "Bahadur", phone: xxxxxx }
];

我想要的输出:

[
  { title: "B", data: [{ name: "Bahadur", phone: xxxxxx }] },
  { title: "M", data: [{ name: "Mohan", phone: xxxxxx }] },
  {
    title: "R",
    data: [
      { name: "Ramanujan", phone: xxxxxx },
      { name: "Rabindranath", phone: xxxxxx }
    ]
  },
  {
    title: "S",
    data: [
      { name: "Satyajit", phone: xxxxxx },
      { name: "Subhash", phone: xxxxxx }
    ]
  }
];

非常感谢您投入的时间。谢谢。
即使是伪代码也可以。

Answer 1

你只需像这样映射你的数组:

const myArray = [
    {name: 'Mohan', phone: 'xxxxxx'},
    {name: 'Ramanujan', phone: 'xxxxxx'},
    {name: 'Rabindranath', phone: 'xxxxxx'},
    {name: 'Satyajit', phone: 'xxxxxx'},
    {name: 'Subhash', phone: 'xxxxxx'},
    {name: 'Bahadur', phone: 'xxxxxx'},
  ];
  const output = myArray.map(item => {
    return {
      title: item.name.charAt(0),
      data: [{name: item.name, phone: item.phone}],
    };
  });

顺便说一句，如果只有一项，数据不必是数组。数据:{name:item.name，phone:item.phone}也可以正常工作。