Question

我有一个对象数组

var arr1 = [{
        "amount": 700,
        "hits": 4,
        "day": 1
    },
    {
        "amount": 100,
        "hits": 7,
        "day": 4
    },
    {
        "amount": 500,
        "hits": 3,
        "day": 8
    }
];

我需要的是创建一个新的对象数组，使用key＆＃34; param＆＃34;在每个对象中，以及＆＃34; param＆＃34;的值应该等于＆＃34;金额＆＃34; arr1对象中的字段。

预期产出：

var newArr = [{
        "param": 700
    },
    {
        "param": 100
    },
    {
        "param": 500
    }
];

Answer 1

您可以使用Array.prototype.map()：

var arr1 = [{"amaunt": 700,"hits": 4,"day": 1}, {"amaunt": 100,"hits": 7,"day": 4}, {"amaunt": 500,"hits": 3,"day": 8}],
    newArr = arr1.map(function(elem) {
        return {param: elem.amaunt};
    });

console.log(newArr);

Answer 2

var newArr = []
arr1.forEach(obj => {
   newArr.push({param: obj.amount});
});

Answer 3

尝试使用map：

var arr1 = [
  {
    "amaunt": 700,
    "hits":4,
    "day":1
  },
  {
    "amaunt": 100,
    "hits":7,
    "day":4
  },
  {
    "amaunt": 500,
    "hits":3,
    "day":8
  }
];
var arr2 = arr1.map(function(obj) {
  return {param: obj.amaunt};
});
console.log(arr2);

Answer 4

你可以试试这个

var arr1 = [
            {
                "amaunt": 700,
                "hits":4,
                "day":1
            },
            {
                "amaunt": 100,
                "hits":7,
                "day":4
            },
            {
                "amaunt": 500,
                "hits":3,
                "day":8
            }
        ];

    var newArr=[];
    arr1.forEach(function(item){
        newArr.push({"param":item.amaunt});
    });
    console.log(newArr);

Answer 5

试试这个

arr1.forEach(function(data){            
          var obj = {"param": data.amount};          
          newArr.push(obj);          
        })

Fiddle此处

Answer 6

另一种方法可以做到这一点

var newArr=[];  
arr1.map(function(obj) {
newArr.push("param:"+obj.amaunt);
 });

从对象数组中获取值

6 个答案: