JS：ObservableArray筛选

Question

我有一个如下所示的observableArray，

var details = ko.observableArray([]);
details = [
      { AccName: "Jane Doe", ExpDt: '2019-01-10', Contract: "Trial" },
      { AccName: "John", ExpDt: '2018-12-30', Contract:  "Licensed"},
      { AccName: "Doe", ExpDt: '2018-09-10', Contract:  "Trial"}
];

因此，我需要根据ExpDt和Contract提取用户。

For Ex => ExpDt < today dt (2019-01-10) and having "trial" contract
Answer should be => Jane Doe

请给我一些建议。

Answer 1

使用Array#filter，destructuring，String#split，Spread operator和Date.UTC

const details=[{AccName:"Jane Doe",ExpDt:"2019-01-10",Contract:"Trial"},{AccName:"John",ExpDt:"2018-12-30",Contract:"Licensed"},{AccName:"Doe",ExpDt:"2018-09-10",Contract:"Trial"}];

const res = details.filter(({ExpDt, Contract})=>{
  const darr = ExpDt.split("-");
  //Date.UTC accepts months from 0 - 11
  darr[1] = darr[1] - 1;
  return Date.UTC(...darr) < Date.now() && Contract === "Trial";
})

console.log(res);

您会得到两个结果，因为Doe也符合要求：

ExpDt: 2018-09-10 < 2019-01-10
Contract: Trial === Trial