Question

    var a=[{"id":1,"total":1000},{"id":2,"total":2000}]
    var b=[{"id":1,"credit":500},{"id":2,"credit":1000}]
    var c=[{"id":1,"reversed":500},{"id":2,"amount":1000}]

我想要这样的东西，

var newArray=[{"id":1,
                       "amount":
                         {"total":1000,"credit":500,"reversed":500}}
                       {"id":2,
                       "amount":
                         {"total":2000,"credit":1000,"reversed":1000}}
               ]

是否可以通过JavaScript函数实现此目的？

Answer 1

使用extend和each

尝试这种方式

＆＃13;

    var a=[{"id":1,"total":1000},{"id":2,"total":2000}];
    var b=[{"id":1,"credit":500},{"id":2,"credit":1000}];
    var c=[{"id":1,"reversed":500},{"id":2,"amount":1000}];
    
    
    var result = $.extend(true, {}, a, b,c);
    
    var newArray = [];
    $.each(result,function(index,value){
      var ind = value.id;
      delete value['id']; //unset id here
      var amount = value;
      newArray.push({id: ind,amount:amount});
    });

    console.log(newArray);

＆＃13;

.as-console-wrapper { max-height: 100% !important; top: 0; }

＆＃13;

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

＆＃13;

Answer 2

您可以使用哈希表作为对具有相同id的对象的引用。迭代所有数组并使用子数组获取键并将值赋给引用的对象。

使用的方法：

Array#forEach，迭代数组
Object.keys，用于获取对象的所有密钥。

＆＃13;

var array1 = [{ "id": 1, "total": 1000 }, { "id": 2, "total": 2000 }],
    array2 = [{ "id": 1, "credit": 500 }, { "id": 2, "credit": 1000 }],
    array3 = [{ "id": 1, "reversed": 500 }, { "id": 2, "amount": 1000 }],
    hash = Object.create(null),
    result = [];

[array1, array2, array3].forEach(function (a) {
    a.forEach(function (o) {
        if (!hash[o.id]) {
            hash[o.id] = {};
            result.push(hash[o.id]);
        }
        Object.keys(o).forEach(function (k) {
            hash[o.id][k] = o[k];
        });
    });
});

console.log(result);

＆＃13;

.as-console-wrapper { max-height: 100% !important; top: 0; }

＆＃13;

嵌套3个不同的对象

2 个答案: