Question

如何更改students[0]＆＃39; John＆＃39;发给：NickName

  var students = [];

  students.push( { Name: 'John', Track: 'HTML', Score: 2000 } );

  students.push( { Name: 'Ron', Track: 'CSS', Score: 2400 } );

  students.push( { Name: 'Jim', Track: 'javaScript', Score: 2800 } );

所以它看起来像这样：

{ NickName: 'John', Track: 'HTML', Score: 2000 }

Answer 1

students[0].NickName = students[0].Name;
delete students[0].Name;

Answer 2

避免使用delete。阅读this

只需使用map

即可

students = students.map(student => ({
    NickName: student.Name,
    Track: student.Track,
    Score: student.Score,
}))

或使用JS ES6 +

students.map(({ Name: NickName, ...student }) => ({ NickName, ...student }))

仅适用于一个指数

students = students.reduce((acc, curr, index) => {
    if (index !== 0)
        return curr

    return ({
        NickName: curr.Name,
        Track: curr.Track,
        Score: curr.Score,
    })
}, [])

Answer 3

正如this thread中所述，简单的非优化方式是：

students[0].NickName = students[0].Name;
delete students[0].Name;

但是有更多优化和聪明的方法来实现它，我让你在提到的线程中发现它们。

Answer 4

如果你想把它当作效用函数：

function convertNameToNickName(obj) {
  obj.NickName = obj.Name;
  delete obj.Name;
}

convertNameToNickName(students[0]);

Answer 5

我试过这个解决方案，它有效！谢谢！ :) obj.NickName = obj.Name; 删除obj.Name;

Answer 6

var students = [];
students.push( { Name: 'John', Track: 'HTML', Score: 2000 } );
students.push( { Name: 'Ron', Track: 'CSS', Score: 2400 } );
students.push( { Name: 'Jim', Track: 'javaScript', Score: 2800 } );
Object.prototype.renameProperty = function (oldName, newName) {
    // Check for the old property name to avoid a ReferenceError in strict mode.
    if (this.hasOwnProperty(oldName)) {
        this[newName] = this[oldName];
        delete this[oldName];
    }
    return this;
};

students.forEach(function(ele) {
    ele.renameProperty('Name','Nickname')
})
console.log(students)

Answer 7

使用.map()我们可以轻松实现这一目标

var newArray = students.map((currentValue, index, array) => {
  currentValue['NickName'] =currentValue['Name'];
  delete currentValue['Name'];
  return currentValue;
})

console.log(newArray)

将密钥更改为另一个值javascript

7 个答案: