Question

我有来自服务器的paymentList json。我需要日期和时间。我正在使用moment.js。我正在创建一个新的属性paymentTime并在该属性中存储时间，但它没有更新。

  this.paymentList.forEach(element => {
                          console.log(moment(element.paymentDate).format("hh:mm A"));
                           console.log(moment(element.paymentDate).format("DD-MMMM-YYYY"));
                           element.paymentTime = moment(element.paymentDate).format("hh:mm A");
                           element.paymentDate = moment(element.paymentDate).format("DD-MMMM-YYYY");
                           console.log(this.paymentList);
                         });


 [
      {
        "paymentDate": "2018-01-09T09:21:13.759Z",
        "loanAmount": "918553377499",
      },
      {
        "paymentDate": "2017-12-27T09:30:41.276Z",
        "loanAmount": "9880712423",

      },
      {
        "paymentDate": "2017-12-27T07:49:09.892Z",
        "loanAmount": "7259945267",

      }

    ]

我知道如果我改变我的代码那么它会起作用，但我想要一种优雅的方式。

this.paymentList.forEach(element => {
var array = [];
var obj = {paymentTime: '', paymentDate: '', loanAmount: ''}
obj.paymentDate= moment(element.paymentDate).format("DD-MMMM-YYYY");
obj.paymentTime = moment(element.paymentDate).format("hh:mm A");
obj.loanAmount = element.loanAmount; 
array.push(obj);
this.paymentList = array;

                         });

Answer 1

你的第二个程序是好的方法，只需稍加修改即可。

    let tempPaymentList:any = [];
    this.paymentList.forEach(element => {
      let obj = {paymentTime: '', paymentDate: '', loanAmount: ''}
      obj.paymentDate= moment(element.paymentDate).format("DD-MMMM-YYYY");
      obj.paymentTime = moment(element.paymentDate).format("hh:mm A");
      obj.loanAmount = element.loanAmount;  
      tempPaymentList.push(obj);
    });
     this.paymentList = tempPaymentList;
     console.log(this.paymentList)

实际上最好是获取主列表的副本，然后根据需要修改复制的列表。

向要动态填充的每个数组对象添加一个新属性

1 个答案: