Question

所以，我有：

"people": [
                {
                    "first": "Linda",
                    "last": "Donson",
                    "salary": "4000USD"
                },
                {
                    "first": "Mark",
                    "last": "Sullivan",
                    "salary": "3500USD"
                },
        ];

现在，我想将其转换为一个仅包含所需数据集的对象新数组。例如：

"people": [
                    {
                        "first": "Linda",
                        "salary": "4000USD"
                    },
                    {
                        "first": "Mark",
                        "salary": "3500USD"
                    },
            ];

我该怎么做？因此，它应该取出"last"键及其值，并且仅返回"first"和"last"。

谢谢

Answer 1

您可以使用map函数获取具有所需选项的新数组 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/map

var source = [ { first: 'first1', last: 'last1', property1: 'p1-1' }, { first: 'first2', last: 'last2', property1: 'p1-2' }];

var mapped = source.map( function (e) {
  return { first: e.first, property1: e.property1 }
})

console.log('mapped : ', mapped)

Answer 2

这实际上是通过map和delete或map和ES6 destructuring的一个简单的班轮，如以下两个示例所示：

var data = [{
    "first": "Linda",
    "last": "Donson",
    "salary": "4000USD"
  },
  {
    "first": "Mark",
    "last": "Sullivan",
    "salary": "3500USD"
  }
]

console.log(data.map(x => delete(x.salary) && x))

此外，如果您担心要更改对象，则可以使用ES6 destructuring和short object literal notation来实现：

Object.values(data).map(({first, last})  => ({first, last}))

Answer 3

您可以使用forEach

var peoples = [{
        "first": "Linda",
        "last": "Donson",
        "salary": "4000USD"
    },
    {
        "first": "Mark",
        "last": "Sullivan",
        "salary": "3500USD"
    },
];


// empty array 
var newPeoples = [];


peoples.forEach((people) => {

    // only push desired object inside empty array
    newPeoples.push({
        "first": people.first,
        "salary": people.salary
    });

});


// desired array of objects
console.log(newPeoples);

从对象数组中选取数据并返回新对象

3 个答案: